573 results on '"Hongyu, Wang"'
Search Results
2. Bisphenol A: Unveiling Its Role in Glioma Progression and Tumor Growth
- Author
-
Liang Niu, Juan Jia, Hu Yang, Shangyu Liu, Hongyu Wang, Yunji Yan, Qiao Li, Qiang Dong, He Zhang, Guoming Zhao, Junqiang Dai, Guoqiang Yuan, and Yawen Pan
- Subjects
bisphenol A (BPA) ,glioma ,cell proliferation ,melatonin ,Biology (General) ,QH301-705.5 ,Chemistry ,QD1-999 - Abstract
Gliomas represent the most common and lethal category of primary brain tumors. Bisphenol A (BPA), a widely recognized endocrine disruptor, has been implicated in the progression of cancer. Despite its established links to various cancers, the association between BPA and glioma progression remains to be clearly defined. This study aimed to shed light on the impact of BPA on glioma cell proliferation and overall tumor progression. Our results demonstrate that BPA significantly accelerates glioma cell proliferation in a time- and dose-dependent manner. Furthermore, BPA has been found to enhance the invasive and migratory capabilities of glioma cells, potentially promoting epithelial–mesenchymal transition (EMT) characteristics within these tumors. Employing bioinformatics approaches, we devised a risk assessment model to gauge the potential glioma hazards associated with BPA exposure. Our comprehensive analysis revealed that BPA not only facilitates glioma invasion and migration but also inhibits apoptotic processes. In summary, our study offers valuable insights into the mechanisms by which BPA may promote tumorigenesis in gliomas, contributing to the understanding of its broader implications in oncology.
- Published
- 2024
- Full Text
- View/download PDF
3. Flame‐Retardant Additive/Co‐Solvent Contained in Organic Solution for Safe Second Batteries: A Review
- Author
-
Dr. Dandan Zhu, Dr. Yanbiao Ren, Dr. Yanxin Yu, Dr. Lincai Zhang, Dr. Yuqin Wan, Prof. Hongyu Wang, Dr. Wentong Gao, Prof. Bing Han, and Dr. Lei Zhang
- Subjects
Safe electrolyte solution ,trimethyl phosphate ,phosphate ,all fluorinated solvent ,ionic liquids ,Industrial electrochemistry ,TP250-261 ,Chemistry ,QD1-999 - Abstract
Abstract With the increased demands of energy density boosting the electrochemical performance of the rechargeable alkali metal ion batteries, the safe operation of second batteries is attracting much attention and needs to be especially considered during their further development, which is essential in view of the well‐known fire incidents of the lithium‐ion batteries. These dangerous events in the lithium‐ion batteries are as a consequence of the exothermic chemical reactions between the flammable carbonate‐based solutions and the electrode active material under the terrible working conditions. Under this circumstance, some series of flame‐retardant organic liquid‐based solutions have demonstrated the potential towards safer rechargeable batteries with the minimal injurious or the advantageous effect on the batteries’ performance. This article reviews the flame‐retardant organic liquid‐based solutions for the rechargeable batteries, providing the reader with an overview of the safe solutions with flame‐retardant additive/co‐solvent involving trimethyl phosphate and its derivative, P‐containing amide/phosphazene, all fluorinated solvent, and ionic liquids, in which the method of adapting concentrated and locally concentrated electrolyte solution are merged in the text content. Moreover, the functionality and purpose of the constituents in some flame‐retardant mixtures are discussed and many flame‐retardant electrolyte solutions are displayed to offer improved cycling and rate performance of different electrodes compared to traditional electrolyte solutions.
- Published
- 2023
- Full Text
- View/download PDF
4. Correction to 'Microstructure of Heavy Oil Components and Mechanism of Influence on Viscosity of Heavy Oil'
- Author
-
Qiuxia Wang, Wei Zhang, Cheng Wang, Xiaodong Han, Hongyu Wang, and Hua Zhang
- Subjects
Chemistry ,QD1-999 - Published
- 2023
- Full Text
- View/download PDF
5. A Novel Ca-Modified Biochar for Efficient Recovery of Phosphorus from Aqueous Solution and Its Application as a Phosphorus Biofertilizer
- Author
-
Yue Xu, Huan Liao, Jing Zhang, Haijun Lu, Xinghua He, Yi Zhang, Zhenbin Wu, Hongyu Wang, and Minghua Lu
- Subjects
phosphorous ,oyster shell ,peanut shell ,biochar ,P biofertilizer ,Chemistry ,QD1-999 - Abstract
Recovery phosphorus (P) from P-contaminated wastewater is an efficient and environmentally friendly mean to prevent water pollution and alleviate the P shortage crisis. In this study, oyster shell as calcium sources and peanut shells as carbon sources (mass ratio 1:1) were used to prepare a novel Ca-modified biochar (OBC) via co-pyrolysis, and its potential application after P adsorption as a P biofertilizer for soil was also investigated. The results shown that OBC had a remarkable P adsorption capacity from wastewater in a wide range of pH 4–12. The maximum P adsorption capacity of OBC was about 168.2 mg/g with adsorbent dosage 1 g/L, which was about 27.6 times that of the unmodified biochar. The adsorption isotherm and kinetic data were better described by Langmuir isotherm model (R2 > 0.986) and the pseudo second-order model (R2 > 0.975), respectively. Characterization analysis of OBC before and after P adsorption by scanning electron microscopy (SEM), X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), and specific surface area and porosity analyzer (BET) indicated that the remarkable P adsorption capacity of OBC was mainly ascribed to chemical precipitation, electrostatic adsorption, and hydrogen bonding. Pot experiment results showed that OBC after P adsorption could significantly promote the germination and growth of Spinacia, which manifested that OBC after P adsorption exhibited a good ability to be reused as P fertilizer for soil.
- Published
- 2022
- Full Text
- View/download PDF
6. Improve the Midpoint Voltage and Structural Stability of Li-Rich Manganese-Based Cathode Material by Increasing the Nickel Content
- Author
-
Hongyu Wang, Feng Zhan, Haiqing Zhan, and Xianquan Ming
- Subjects
Li-rich layered oxide ,LiNiO2 composition ,cation mix ,cyclic stability ,Chemical technology ,TP1-1185 ,Chemistry ,QD1-999 - Abstract
Lithium-rich manganese is a promising new-generation cathode material for lithium-ion batteries. However, it has the common problems of serious discharge capacity decline, poor rate performance, and faster midpoint voltage decay. In this experiment, a sol-gel method was used to synthesize a high-nickel, lithium-rich layered oxide (1 − x)Li1.2Mn0.54Co0.13Ni0.13O2 − xLiNiO2 (x = 0, 1.0, 2.0, 3.0 and 4.0) that was characterized by XRD, SEM, XPS, TEM, and charge-discharge performance tests. The research results show that increasing Ni content can improve the stability of the material structure and enhance the electrochemical performance of the cathode material. When the LiNiO2 is 0.3, the electrochemical performance is better, the capacity retention rate is 100.3% after 60 cycles at a current density of 0.2 C, and the capacity retention rate for 100 cycles at 0.5 C is 99.0%.
- Published
- 2022
- Full Text
- View/download PDF
7. An endoplasmic reticulum-targeted organic photothermal agent for enhanced cancer therapy
- Author
-
Kaiye Wang, Bo Tang, Na Li, Yanan Xiang, Wei Pan, and Hongyu Wang
- Subjects
Intracellular signal transduction ,chemistry.chemical_classification ,chemistry ,In vivo ,Endoplasmic reticulum ,Protein biosynthesis ,Biophysics ,Immunogenic cell death ,Peptide ,General Chemistry ,Photothermal therapy ,In vitro - Abstract
Developing selectively targeted photothermal agents to reduce side effects in photothermal therapy remains a great challenge. Inspired by the key role of endoplasmic reticulum in the protein synthesis and intracellular signal transduction, particularly for the immunogenic cell death induced by endoplasmic reticulum stress, we developed an endoplasmic reticulum-targeted organic photothermal agent (Ts-PT-RGD) for enhancing photothermal therapy of tumor. The photothermal agent was covalently attached with 4-methylbenzenesulfonamide and cyclic Arg-Gly-Asp (cRGD) peptide for realizing the targeting of endoplasmic reticulum and tumor cell. Owing to its amphiphilic properties, it readily self-assembles in water to form nanoparticles. The photothermal agent possesses excellent photophysical properties and biological compatibility. In vitro and in vivo experiments demonstrate that it can actively target endoplasmic reticulum and effectively ablate tumor with near-infrared laser.
- Published
- 2022
8. Asymmetric Dieckmann Condensation towards Spirocyclic Oxindoles Catalyzed by Amino Acid‐Derived Phosphonium Salts
- Author
-
Lijun Xu, Hongyu Wang, Jun Liu, Yufei Wu, Changwu Zheng, Gang Zhao, and Longhui Yu
- Subjects
chemistry.chemical_classification ,chemistry.chemical_compound ,chemistry ,Organic chemistry ,General Chemistry ,Phosphonium ,Dieckmann condensation ,Amino acid ,Catalysis - Published
- 2021
9. Response of aerobic sludge to AHL-mediated QS: Granulation, simultaneous nitrogen and phosphorus removal performance
- Author
-
Jia Shuai, Wenbin Guo, Xiaoling Hu, Bin Wang, Hongyu Wang, Wanlin Lyu, Dao Zhou, and Rongfan Chen
- Subjects
biology ,Phosphorus ,food and beverages ,chemistry.chemical_element ,General Chemistry ,Human decontamination ,biology.organism_classification ,Granulation ,Quorum sensing ,Activated sludge ,Extracellular polymeric substance ,Wastewater ,chemistry ,Food science ,Bacteria - Abstract
The effects of different species and concentrations’ signal molecules on aerobic activated sludge system were investigated through batch experiments. Results showed that the fastest NH4+-N oxidization rate and the most extracellular polymeric substances (EPS) secretion were obtained by adding 5 nmol/L N-hexanoyl-L-homoserine lactone (C6-HSL) into the aerobic activated sludge. Further study investigated the correlation among N-acyl-homoserine lactones-mediated quorum sensing (AHLs-mediated QS), nutrient removal performances and microbial communities with the long-term addition of 5 nmol/L C6-HSL. It was found that C6-HSL-manipulation could enhance the stability and optimize the decontamination performance of aerobic granular sludge (AGS) system. Microbial compositions considerably shifted with long-term C6-HSL-manipulation. Exogenous C6-HSL-manipulation inhibited quorum quenching-related (QQ-related) activities and enhanced QS-related activities during the stable period. The proposed C6-HSL-manipulation might be a potential technology to inhibit the growth of harmful bacteria in AGS, which could provide a theoretical foundation for the realization of more stable biological wastewater treatments.
- Published
- 2021
10. Determination of 12 quinolones in honey by vortex-assisted dispersive liquid liquid microextraction performed in syringe based on deep eutectic solvent combine with ultra performance liquid chromatography-mass spectrometry
- Author
-
Hongyu Wang, Daowen Li, Cun Li, Zhao Sijun, Zhang Wei, Linyan Yang, Liuan Li, Yixia Wang, Cuiping Song, and Chang Liu
- Subjects
Detection limit ,Chromatography ,Materials science ,Extraction (chemistry) ,Aqueous two-phase system ,General Chemistry ,Mass spectrometry ,Biochemistry ,Industrial and Manufacturing Engineering ,Deep eutectic solvent ,Solvent ,chemistry.chemical_compound ,chemistry ,Liquid chromatography–mass spectrometry ,Sample preparation ,Food Science ,Biotechnology - Abstract
A novel vortex-assisted dispersive liquid–liquid microextraction method based on deep eutectic solvent (VA–DLLME–DES) completed in syringe has been established to extract 12 quinolones from honey. This method is an improvement of traditional DLLME. In this work, the green DES prepared with heptanoic acid and thymol was used for extractant rather than traditional organic extraction solvent. Without centrifugation, the phases were separated in the way of removing aqueous phase by pushing the syringe and extractant phase was collected for ultra performance liquid chromatography-mass spectrometry (UPLC–MS) analysis. The stability of DES and some experimental parameters (type, molar ratios and volume of extraction solvent, type and volume of dispersant, vortex time and effect of pH and NaCl) were evaluated. In the range of 2–100 ng/mL, the proposed method showed good linearities (r2 ranged from 0.996 to 0.999). The extraction recoveries were obtained in the range of 75.01%–117.05% and relative standard deviations were less than 13.83% for inter- (n = 6) and intra-day (n = 3) precisions. The limits of detection and quantification were 3 ng g−1 and 10 ng g−1, respectively. The developed method with the advantages of simple operation, short extraction time and less consumption organic solvent provides a technical idea for green, simple and time-saving sample preparation methods.
- Published
- 2021
11. Automatic Identification of Sedimentary Facies Based on a Support Vector Machine in the Aryskum Graben, Kazakhstan
- Author
-
Xiao Ai, Hongyu Wang, and Baitao Sun
- Subjects
machine learning ,support vector machine ,south turgay basin ,aryskum graben ,depositional subfacies ,automatic identification model ,data mining ,Technology ,Engineering (General). Civil engineering (General) ,TA1-2040 ,Biology (General) ,QH301-705.5 ,Physics ,QC1-999 ,Chemistry ,QD1-999 - Abstract
The Aryskum Depression in the South Turgay Basin has shown improving exploration prospects for subtle reservoirs, due to investment in the exploration workload and more comprehensive geological research. Among them, lithologic stratigraphic reservoirs have gradually become one of the focuses of oil and gas exploration. At present, deduction of the sedimentary characteristics of the target layer through core wells using artificial exploration has become an urgent problem to be solved. We selected 16 artificially interpreted coring wells in the Aryskum Graben for this study. Using the parameters of the gamma-ray (GR) curve of coring wells and support vector machine (SVM) classification algorithms, we developed an automatic identification model of sedimentary facies in the study area. The application of the SVM includes the following steps: Firstly, using the GR curve of 16 coring wells, six quantitative indexes defined as standard deviation, relative gravity, curve amplitude ratio, average median, average slope, and mutation amplitude, are selected to quantify the logging curve in the study area, thus realizing the description of the logging curve form. Secondly, training samples are selected to establish an SVM classification model. Finally, a quantitative discrimination model based on the SVM algorithm is established to realize the classification of depositional facies. Field application shows that this solution can be effectively used in uncored wells to identify depositional facies with a rate of accuracy approaching 70%. Our results provide new methods for the identification of sedimentary facies in the study area. The results will also provide a theoretical basis, as well as data basis, for further fine division of microfacies in the study area.
- Published
- 2019
- Full Text
- View/download PDF
12. Improving the Diffusion of Lithium and Enhancing the Electrochemical Performance of Layered Li1.2Mn0.54Ni0.13Co0.13O2 Cathode by YPO4 Coating
- Author
-
Hongyu Wang
- Subjects
Materials science ,General Chemical Engineering ,chemistry.chemical_element ,engineering.material ,Electrochemistry ,Industrial and Manufacturing Engineering ,Cathode ,law.invention ,chemistry ,Coating ,X-ray photoelectron spectroscopy ,law ,Phase (matter) ,engineering ,Surface modification ,General Materials Science ,Lithium ,Composite material ,Layer (electronics) - Abstract
Because of its high energy density, the manganese-rich lithium layered material is a potential cathode material for power batteries. In order to effectively strengthen the comprehensive performance of lithium-rich layered material, different amounts of YPO4 compounds were used to wet chemically coat the cathode materials. The LMNCO, 0.5-YPO4, 1.0-YO4 and 3.0-YPO4 cathode materials are tested by XRD, SEM, TEM, XPS, constant current charge and discharge test, and EIS. Facts show that the positive electrode material coated with YPO4 has better cycle performance and rate performance. The 1.0-YPO4 sample material has the best performance. After 50 cycles of 0.5 C, its discharge capacity can still be as high as 207.4 mAhg-1.The comprehensive performance of the cathode material is improved after being coated with YPO4, which is owing to the coating of YPO4. The YPO4 layer weakens the electron transfer resistance, and suppress the phase transformation of the Electrode material and the formation of the SEI film.
- Published
- 2021
13. A magnetic nanoparticle-based lateral flow immunochromatography assay for the rapid detection of fluoroquinolones in milk
- Author
-
Yi Ma, Daowen Li, Zhang Wei, Cun Li, Liuan Li, Linyan Yang, Hongyu Wang, and Chang Liu
- Subjects
Detection limit ,Analyte ,Chromatography ,Chemistry ,Phosphate buffered saline ,Nanoparticle ,General Chemistry ,Mass spectrometry ,Biochemistry ,Rapid detection ,Industrial and Manufacturing Engineering ,Milk sample ,Quantitative analysis (chemistry) ,Food Science ,Biotechnology - Abstract
A magnetic nanoparticle (MNP)-based lateral flow immunochromatography assay (LFIA) was established to detect fluoroquinolones (FQs) in milk. This method is an improvement of traditional Au nanoparticle (AuNP)-based LFIA. Compared with AuNP-labeled antibody, the combination between MNPs and antibody is stronger and more stable, and the preparation process is convenient. In this study, the color intensity of MNPs-LFIA test strip was analyzed, which laid a research foundation for magnetic quantitative analysis and high sensitivity analysis of LFIA. The limits of detection (LODs) for 10 FQs in phosphate buffer (PB) solution ranged from 1 to 5 ng/mL, and in milk ranged from 2 to 20 ng/mL. The recovery in spiked milk sample ranged from 16.47 to 83.67%. The log functions of analyte concentration and T/C value were fitted into a linear equation. The specificity of the MNPs-LFIA is satisfactory, without cross-reaction with antibiotics from other chemical classes. The results of this method are consistent with those of ultra-performance liquid chromatography-mass spectrometry, indicating the MNPs-LFIA method is reliable and accurate. As far as we know, this is the first time that MNPs-LIFA has been applied to the detection of FQs in milk.
- Published
- 2021
14. Combining Experiments and Theoretical Calculations to Investigate the Intercalation Behavior of Bis(trifluoromethanesulfonimide) Anion into Graphite Electrodes from Alkyl Phosphates
- Author
-
Zhijian Wu, Ying Wang, Lei Zhang, and Hongyu Wang
- Subjects
chemistry.chemical_classification ,Materials science ,Intercalation (chemistry) ,Inorganic chemistry ,Alkyl phosphate ,chemistry.chemical_element ,Electrolyte ,Electrochemistry ,chemistry.chemical_compound ,chemistry ,General Materials Science ,Tributyl phosphate ,Lithium ,Graphite ,Alkyl - Abstract
In dual-ion batteries (DIBs) utilizing organic electrolyte solutions, the combinations of electrolyte salt and solvent serve as a determiner of the electrochemical performance of graphite electrode partially because solvent participates in the anion intercalation procedure. In this case, every solvated-anion@graphite intercalation compound possesses the characteristic intercalated gallery height. However, in Li/graphite DIBs with concentrated LiTFSI (lithium bis(trifluoromethanesulfonimide))-alkyl phosphates (ca. trimethyl, triethyl, tripropyl, tributyl phosphate) solutions, solvated-TFSI-@graphite intercalation compounds have the nearly identical intercalated gallery height of about 0.803 nm, which may be mainly attributed to both the big size of TFSI- anion and the rigid PO4 framework of these alkyl phosphate solvents.
- Published
- 2021
15. Intercalation of multiply solvated hexafluorophospate anion into graphite electrode from mixtures of methyl acetate, ethyl methyl and ethylene carbonates
- Author
-
Hongyu Wang and Lei Zhang
- Subjects
chemistry.chemical_compound ,Fuel Technology ,Ethylene ,chemistry ,Methyl acetate ,Polymer chemistry ,Intercalation (chemistry) ,Electrochemistry ,Energy Engineering and Power Technology ,Energy (miscellaneous) ,Ion ,Graphite electrode - Published
- 2021
16. Olefin Functionalization/Isomerization Enables Stereoselective Alkene Synthesis
- Author
-
Ming Joo Koh, Osvaldo Gutierrez, Robert T. Martin, Chen-Fei Liu, Hongyu Wang, and Haonan Zhao
- Subjects
chemistry.chemical_classification ,Steric effects ,Olefin fiber ,Chemistry ,Alkene ,Process Chemistry and Technology ,Bioengineering ,Biochemistry ,Combinatorial chemistry ,Article ,Catalysis ,Heck reaction ,Electrophile ,Stereoselectivity ,Isomerization - Abstract
Despite tremendous efforts aimed at devising methods for stereoselective alkene synthesis, critical challenges are yet to be addressed. Direct access to a diverse range of 1-aryl(boryl)-1-methyl-functionalized tri- and tetrasubstituted trans alkenes, entities that are prevalent in many important molecules, through a catalytic manifold from readily available α-olefin substrates remains elusive. Here, we demonstrate that catalytic amounts of a non-precious N-heterocyclic carbene–Ni(I) complex in conjunction with a sterically bulky base promote site- and trans-selective union of monosubstituted olefins with a wide array of electrophilic reagents to deliver tri- and tetrasubstituted alkenes in up to 92% yield and >98% regio- and stereoselectivity. The protocol is amenable to the preparation of carbon- and heteroatom-substituted C=C bonds, providing distinct advantages over existing transformations. Utility is highlighted through concise stereoselective synthesis of biologically active compounds. Stereoselective synthesis of tri-and tetrasubstituted olefins is challenging due to the usually low energy difference between their E/Z isomers. Now, access to these molecules in high E:Z ratios from monosubstituted olefins is achieved through a sequential nickel-catalysed Heck reaction and alkene migration.
- Published
- 2022
17. Catalytic Regioselective Olefin Hydroarylation(alkenylation) by Sequential Carbonickelation-Hydride Transfer
- Author
-
Hongyu Wang, Chen-Fei Liu, Ming Joo Koh, and Xiaohua Luo
- Subjects
chemistry.chemical_classification ,Olefin fiber ,Alkene ,Hydride ,Aryl ,Regioselectivity ,General Chemistry ,010402 general chemistry ,01 natural sciences ,Biochemistry ,Combinatorial chemistry ,Catalysis ,0104 chemical sciences ,chemistry.chemical_compound ,Colloid and Surface Chemistry ,chemistry ,Yield (chemistry) ,Alkoxide - Abstract
Alkene hydrocarbofunctionalization represents one of the most important classes of chemical transformations, but related branched-selective examples with unactivated olefins are scarce. Here, we report that catalytic amounts of a dimeric Ni(I) complex and an exogenous alkoxide base promote Markovnikov-selective hydroarylation(alkenylation) of unactivated and activated olefins using organo bromides or triflates derived from widely available phenols and ketones. Products bearing aryl- and alkenyl-substituted tertiary and quaternary centers could be isolated in up to 95% yield and >99:1 regioisomeric ratios. Contrary to previous dual-catalytic methods that rely on metal-hydride atom transfer (MHAT) to the olefin prior to carbofunctionalization with a cocatalyst, our mechanistic evidence points toward a nonradical reaction pathway that begins with site-selective carbonickelation across the C═C bond followed by hydride transfer using alkoxide as the hydride source. Utility of the single-catalyst protocol is highlighted through the synthesis of medicinally relevant scaffolds.
- Published
- 2021
18. Tungsten Suboxide Nanoneedles as an Effective Thermal Shield through Near-Infrared Reflection and Absorption
- Author
-
Hongyu Wang, Zhen Quan Cavin Ng, Jiaxin Yan, Stephen J. Pennycook, Ashutosh Rath, and Daniel H. C. Chua
- Subjects
Suboxide ,Materials science ,business.industry ,Near-infrared spectroscopy ,chemistry.chemical_element ,Tungsten ,Surfaces, Coatings and Films ,Electronic, Optical and Magnetic Materials ,General Energy ,Reflection (mathematics) ,chemistry ,Shield ,Thermal ,Optoelectronics ,Physical and Theoretical Chemistry ,Absorption (electromagnetic radiation) ,business - Published
- 2021
19. Hexafluorophosphate Intercalation into the Graphite Electrode from Mixed Cyclic Carbonates
- Author
-
Boyu Wang, Yuhao Huang, Lei Zhang, Shunchao Ma, Yunju Wang, and Hongyu Wang
- Subjects
chemistry.chemical_compound ,Materials science ,chemistry ,Hexafluorophosphate ,Intercalation (chemistry) ,Inorganic chemistry ,Materials Chemistry ,Electrochemistry ,Energy Engineering and Power Technology ,Chemical Engineering (miscellaneous) ,Electrolyte ,Electrical and Electronic Engineering ,Graphite electrode - Abstract
The storage of anions in the graphite electrode depends upon the composition of electrolyte solutions. LiPF6 and cyclic carbonates are the most common components of nonaqueous electrolyte solutions...
- Published
- 2021
20. Efficient and Facile Synthesis of High-Quality Palladium Nanoparticles
- Author
-
Hongyu Wang, He Liang, Tianyi Wang, Liu Mingkun, and Hao Wang
- Subjects
Freeze-drying ,chemistry.chemical_compound ,Materials science ,Reaction temperature ,Chemical engineering ,chemistry ,Oleylamine ,Palladium nanoparticles ,Nanoparticle ,Physical and Theoretical Chemistry - Abstract
Palladium nanoparticles were prepared via solvothermal method using Na2PdCl4, AgNO3, and oleylamine. By choosing the optimal reaction time and reaction temperature, palladium nanoparticles with regular morphology and size within 10 nm were prepared. A vacuum freeze drying was applied to prevent aggregation of nanoparticles.
- Published
- 2021
21. A non-wetting and conductive polyethylene dioxothiophene hole transport layer for scalable and flexible perovskite solar cells
- Author
-
Lin Zhang, Li Rao, Chenxiang Gong, Ting Hu, Xiaotian Hu, Xiangchuan Meng, Zhi Xing, Yiwang Chen, Zengqi Huang, Licheng Tan, and Hongyu Wang
- Subjects
Materials science ,business.industry ,Doping ,02 engineering and technology ,General Chemistry ,Conductivity ,Polyethylene ,010402 general chemistry ,021001 nanoscience & nanotechnology ,01 natural sciences ,0104 chemical sciences ,law.invention ,chemistry.chemical_compound ,Crystallinity ,chemistry ,law ,Optoelectronics ,Crystallization ,0210 nano-technology ,business ,Layer (electronics) ,Electrical conductor ,Perovskite (structure) - Abstract
The regulated crystallization of perovskite and highly repeatable preparation are decisive challenges for large-scale flexible perovskite solar cells (PSCs). Herein, we synthesize an oil-soluble poly(3,4-ethylenedioxythiophene) (Oil-PEDOT) as a hole transport layer (HTL). The non-wetting Oil-PEDOT HTL can promote the quality of large-area flexible perovskite films because of its optimized crystallinity and printability. The Oil-PEDOT layer also delivers desirable conductivity and charge transport without a complex doping. Consequently, the flexible PSCs with Oil-PEDOT HTL achieve an efficiency of 19.51% and 16.70% based on 1.05 and 22.50 cm2, respectively. Moreover, these large-scale flexible PSCs demonstrate remarkable mechanical robustness, and the efficiency exhibits 93% retention after 7,000 bending cycles. These results show that the Oil-PEDOT is a potentially efficient HTL for fabricating efficient large-scale flexible PSCs.
- Published
- 2021
22. PF6– Intercalation into Graphite Electrode from Propylene Carbonate
- Author
-
Hui Fan, Hongyu Wang, and Dandan Zhu
- Subjects
Materials science ,Inorganic chemistry ,Intercalation (chemistry) ,Energy Engineering and Power Technology ,Compatibility (geochemistry) ,Ion ,chemistry.chemical_compound ,chemistry ,Hexafluorophosphate ,Electrode ,Propylene carbonate ,Materials Chemistry ,Electrochemistry ,Chemical Engineering (miscellaneous) ,Carbonate ,Graphite ,Electrical and Electronic Engineering - Abstract
LiPF6-propylene carbonate (PC) solutions show some compatibility with the graphite positive electrode in dual-ion batteries. The relationship between the anion storage capacity and LiPF6 concentrat...
- Published
- 2021
23. X-aptamers targeting Thy-1 membrane glycoprotein in pancreatic ductal adenocarcinoma
- Author
-
David W. Dawson, Ru Chen, Sheng Pan, Lisa A. Lai, Kimberly A. Kelly, Xin Li, Hongyu Wang, and Teresa A. Brentnall
- Subjects
0301 basic medicine ,Glycosylation ,Aptamer ,Quantitative proteomics ,Context (language use) ,urologic and male genital diseases ,Biochemistry ,Article ,Flow cytometry ,03 medical and health sciences ,chemistry.chemical_compound ,Drug Delivery Systems ,Cell Line, Tumor ,medicine ,Humans ,030102 biochemistry & molecular biology ,medicine.diagnostic_test ,biology ,Chemistry ,General Medicine ,Aptamers, Nucleotide ,Neoplasm Proteins ,Biomarker (cell) ,Pancreatic Neoplasms ,030104 developmental biology ,biology.protein ,Thy-1 Antigens ,Thy-1 Membrane Glycoprotein ,Antibody ,Carcinoma, Pancreatic Ductal - Abstract
Modified DNA aptamers incorporated with amino-acid like side chains or drug-like ligands can offer unique advantages and enhance specificity as affinity ligands. Thy-1 membrane glycoprotein (THY1 or CD90) was previously identified as a biomarker candidate of neovasculature in pancreatic ductal adenocarcinoma (PDAC). The current study developed and evaluated modified DNA X-aptamers targeting THY1 in PDAC. The expression and glycosylation of THY1 in PDAC tumor tissues were assessed using immunohistochemistry and quantitative proteomics. Bead-based X-aptamer library that contains 10(8) different sequences was used to screen for high affinity THY1 X-aptamers. The sequences of the X-aptamers were analyzed with the next-generation sequencing. The affinities of the selected X-aptamers to THY1 were quantitatively evaluated with flow cytometry. Three high affinity THY1 X-aptamers, including XA-B217, XA-B216 and XA-A9, were selected after library screening and affinity binding evaluation. These three X-aptamers demonstrated a high binding affinity and specificity to THY1 protein and the THY1 expressing cell lines, using THY1 antibody as a comparison. The development of these X-aptamers provides highly specific and non-immunogenic affinity ligands for THY1 binding in the context of biomarker development and clinical applications. They could be further exploited to assist molecular imaging of PDAC targeting THY1.
- Published
- 2021
24. Organophosphine bearing multiple hydrogen-bond donors for asymmetric Michael addition reaction of 1-oxoindane-2-carboxylic acid ester via dual-reagent catalysis
- Author
-
Hongyu Wang, Yongjia Shang, Changwu Zheng, Gang Zhao, and Haoran Hong
- Subjects
chemistry.chemical_classification ,Dipeptide ,Hydrogen bond ,Carboxylic acid ,02 engineering and technology ,General Chemistry ,010402 general chemistry ,021001 nanoscience & nanotechnology ,01 natural sciences ,Combinatorial chemistry ,0104 chemical sciences ,Catalysis ,chemistry.chemical_compound ,Nucleophile ,chemistry ,Reagent ,Michael reaction ,Indene ,0210 nano-technology - Abstract
Multiple hydrogen bonds containing nucleophilic phosphines derived from dipeptide dual-reagents catalyzed asymmetric Michael addition reactions between indene esters and activated olefins in high yields and good to excellent enantioselectivities under mild reaction conditions. The success of current highly selective reactions should provide inspiration for expansion to other reactions and would open up new paradigms for the synthesis of indanone derivatives bearing chiral quaternary carbon centers.
- Published
- 2021
25. Robust Storage of Chinese Language in a Pool of Small Single-Stranded DNA Rings and Its Facile Reading-Out
- Author
-
Hui Chen, Hongfang Liu, Xiangyu Gong, Ran An, Jing Wang, Jiaojiao Tao, Wang Chenru, Hongyu Wang, Xingguo Liang, Makoto Komiyama, Ning Huang, Taiwei Yang, and Zhihao Song
- Subjects
business.industry ,Chemistry ,media_common.quotation_subject ,Information technology ,Archival storage ,General Chemistry ,World Wide Web ,chemistry.chemical_compound ,Reading (process) ,Chinese language ,Nanopore sequencing ,business ,DNA ,media_common - Abstract
Archival storage in DNA is one of the most challenging themes in rapidly growing information technology. In addition, its practical applications are more difficult due to complicated data analysis,...
- Published
- 2021
26. Hydrogen abstraction/addition reactions in soot surface growth
- Author
-
Qingzhao Chu, Dongping Chen, Hongyu Wang, Baolu Shi, and Lijuan Liao
- Subjects
Surface diffusion ,chemistry.chemical_classification ,Chemistry ,Radical ,General Physics and Astronomy ,Polycyclic aromatic hydrocarbon ,02 engineering and technology ,010402 general chemistry ,021001 nanoscience & nanotechnology ,medicine.disease_cause ,Hydrogen atom abstraction ,Photochemistry ,01 natural sciences ,Soot ,0104 chemical sciences ,Collision theory ,Molecular dynamics ,chemistry.chemical_compound ,Monomer ,Reaction rate constant ,medicine ,Density functional theory ,Physical and Theoretical Chemistry ,0210 nano-technology - Abstract
The hydrogen abstraction (HB) and addition reactions (HD) by H radicals are examined on a series of polycyclic aromatic hydrocarbon (PAH) monomers and models of quasi-surfaces using quasi-classical trajectory (QCT) method. The QCT results reproduce the rate constants of HB reactions on PAH monomers from density function theory (DFT) in the range of 1500-2700 K. The PAH size has a minor impact on the rates of HB reactions especially at temperatures beyond 2100 K. By contrast, HD reactions have a clear size dependence and a larger PAH yields a higher rate. It is also found that the preferred reaction pathway changing from HB to HD reactions at ~1900 K. The rates of surface HB and HD reactions exceed those in the gas phase by nearly a factor of magnitude. Further analysis on the detailed trajectory of QCT method reveals that about 50% of the surface reactions can be attributed to the events of surface diffusion, which depends on the local energy transfer in the gas-surface interactions. However, this phenomenon is not preferred in PAH monomers as expected. Our finding here highlights the misinterpretation of surface reactions as the product of the first collision between gaseous species and particle surface, and surface diffusion induced reactions should be accounted for in the rates of surface HB and HD reactions. Rate constants of HB and HD reactions on each reactive site (surface zig-zag, surface free-edge and pocket free-edge sites) are calculated by QCT method, which are recommended for the further development of surface chemistry models in soot formation.
- Published
- 2021
27. Novel natural inhibitors targeting B-RAF(V600E) by computational study
- Author
-
Bo Wu, Gaojing Dou, Zhiyun Zhang, Hongyu Wang, Haoqun Xie, Dong Zhu, Junliang Ge, and Xiaye Lv
- Subjects
Proto-Oncogene Proteins B-raf ,Drug ,CYP2D6 ,discovery studio ,media_common.quotation_subject ,Bioengineering ,Computational biology ,Molecular Dynamics Simulation ,Applied Microbiology and Biotechnology ,Mice ,Drug Discovery ,medicine ,Animals ,Humans ,B-raf(v600e) ,Distribution (pharmacology) ,Vemurafenib ,Protein Kinase Inhibitors ,ADME ,media_common ,Virtual screening ,Chemistry ,drug treatment ,General Medicine ,virtual screening ,Rats ,TP248.13-248.65 ,Databases, Chemical ,V600E ,Research Article ,Research Paper ,Biotechnology ,medicine.drug ,Discovery Studio - Abstract
The aim of this research was to screen the ZINC15 database to select lead compounds and drug candidates which can inhibit B-RAF (V600E). In order to identify drugs potentially inhibited B-RAF (V600E), numerous modules of Discovery Studio 4.5 were employed. Structure-based screening using LibDock was carried out followed by ADME (absorption, distribution, metabolism, excretion) and toxicity prediction. CDOCKER was performed to demonstrate the binding affinity and mechanism between ligands and B-RAF(V600E). To evaluate whether ligand-receptor complexes were stable, molecular dynamics were employed. Two novel natural compounds (ZINC000100168592 and ZINC000049784088) from ZINC15 database were found binding to B-RAF(V600E) with more favorable interaction energy in comparison with the reference drug Vemurafenib. Also, they were predicted with less ames mutagenicity, rodent carcinogenicity, non-developmental toxic potential and tolerance to cytochrome P450 2D6 (CYP2D6). The molecular dynamics simulation analysis indicated that the compound-B-RAF(V600E) complexes had more favorable potential energy compared with Vemurafenib and they can exist in natural environments stably. The result of this study shows that ZINC000100168592 and ZINC000049784088 are ideal leading potential compounds to inhibit B-RAF(V600E). The findings of this study and these selected drug candidates greatly contributed to the medication design and improvement of B-RAF(V600E) and other proteins., Graphical abstract
- Published
- 2021
28. Enantioselectivity switch in asymmetric Michael addition reactions using phosphonium salts
- Author
-
Changwu Zheng, Gang Zhao, Guo-Sheng Fang, Hongyu Wang, and Lu Pan
- Subjects
chemistry.chemical_classification ,Dipeptide ,General method ,010405 organic chemistry ,Organic Chemistry ,010402 general chemistry ,01 natural sciences ,Biochemistry ,Combinatorial chemistry ,0104 chemical sciences ,Amino acid ,Catalysis ,chemistry.chemical_compound ,chemistry ,Michael reaction ,Salts ,Phosphonium ,Physical and Theoretical Chemistry ,Enantiomer - Abstract
Efficient access to two enantiomers of one chiral compound is critical for the discovery of drugs. However, it is still a challenging problem owing to the difficulty in obtaining two enantiomers of one chiral catalyst. Here, we report a general method to obtain both enantiomeric products via fine tuning the hydrogen-bonding interactions of phosphonium salts. Amino acid derived phosphonium salts and dipeptide derived phosphonium salts exhibited different properties for controlling the transition state, which could efficiently promote the Michael addition reaction to give opposite configurations of products with high yields and enantioselectivities. Preliminary investigations on the mechanism of the reaction and applications of the products were also performed.
- Published
- 2021
29. Surface properties of heterogeneous polycyclic aromatic hydrocarbon clusters
- Author
-
Laura Pascazio, Dongping Chen, Kimberly Bowal, Markus Kraft, and Hongyu Wang
- Subjects
Materials science ,Hydrogen ,Mechanical Engineering ,General Chemical Engineering ,chemistry.chemical_element ,medicine.disease_cause ,Small molecule ,Soot ,Molecular dynamics ,chemistry ,Chemical physics ,Surface roughness ,medicine ,Molecule ,Particle ,Physics::Chemical Physics ,Physical and Theoretical Chemistry ,Carbon - Abstract
In this paper we investigate the impact of molecular inhomogeneity on the surface properties of soot particles. Using replica exchange molecular dynamics and solvent-excluded surface analysis, we evaluate detailed surface properties directly from particles containing polycyclic aromatic hydrocarbon molecules of different sizes. The temperature-dependent behaviour of surface roughness and number densities of reactive sites are evaluated for particles from 1–5 nm in diameter. The percentage of carbon atoms and zig-zag sites on the particle surface are found to be independent of molecular composition, while molecule heterogeneity influences the accessible hydrogen atoms and free-edge sites. These relationships allow the prediction of surface composition for a given particle diameter. The surface densities of carbon and hydrogen atoms are explained by the morphological changes and molecule size contributions for solid-like and liquid-like configurations. Small molecules contribute significantly to the particle surface properties at low temperatures, regardless of the proportion of molecule sizes, which results in an increased density of accessible carbon atoms for heterogeneous particles. Interestingly, the surface density of edge carbon atoms and free-edge sites can be predicted from the average molecule size alone. The density of hydrogen atoms on the surface follows the average expected values from the constituent molecule sizes, suggesting that for particles containing many different molecule sizes the α parameter corresponding to the HACA mechanism converges to a linear temperature-dependent trend. This quantitative evaluation of the accessibility of reactive sites for heterogeneous particles provides important information for understanding soot particle growth and oxidation.
- Published
- 2021
30. Revealing the optical properties of polycyclic aromatic hydrocarbon clusters with surface formyl groups
- Author
-
Zhengshe Kang, Hongliang Li, Dongping Chen, and Hongyu Wang
- Subjects
chemistry.chemical_classification ,Chemistry ,Mechanical Engineering ,General Chemical Engineering ,Polycyclic aromatic hydrocarbon ,Coronene ,chemistry.chemical_compound ,X-ray photoelectron spectroscopy ,Quantum dot ,Surface modification ,Pyrene ,Physical chemistry ,Physical and Theoretical Chemistry ,HOMO/LUMO ,Basis set - Abstract
Soot particles from flames were found to have quantum confinement behavior in recent UV–visible absorption measurements. However, the impact of surface functionalization was not considered in the previous interpretation. In this work, polycyclic aromatic hydrocarbon (PAH) clusters was selected as a model system of soot to explore the impact of surface functionalization on the optical properties. The HOMO–LUMO gap of PAH clusters with formyl group (–CHO) substitutions was computed using the B3LYP method with the 6-31G(d) basis set. The results showed that the HOMO–LUMO gaps of PAH clusters strongly depend on the surface coverage of –CHO groups on particle, and a higher coverage always yield a reduced gap value. Combining the observation from X-ray photoelectron spectroscopy measurements, the impact of functional groups was computed as 0.27–0.71 eV. Detailed analysis on the electronic structures of HOMO and LUMO reveals that the –CHO groups lower the LUMO energy to a great extent, while they have limited impact on the HOMO energy. Furthermore, we use the LUMO composition as a key descriptor to evaluate the impact of functionalization on LUMO energy, and a theoretical limit of gap reduction was calculated as 1.1 eV for both pyrene and coronene clusters.
- Published
- 2021
31. An in situ bifacial passivation strategy for flexible perovskite solar module with mechanical robustness by roll-to-roll fabrication
- Author
-
Hongyu Wang, Runsheng Wu, Zengqi Huang, Chenxiang Gong, Shuqin Xiao, Zhi Xing, Li Rao, Licheng Tan, Shaohua Zhang, Xiaotian Hu, Xiangchuan Meng, Yiwang Chen, and Ting Hu
- Subjects
Fabrication ,Materials science ,Passivation ,Renewable Energy, Sustainability and the Environment ,business.industry ,Energy conversion efficiency ,chemistry.chemical_element ,02 engineering and technology ,General Chemistry ,010402 general chemistry ,021001 nanoscience & nanotechnology ,01 natural sciences ,0104 chemical sciences ,Roll-to-roll processing ,Nickel ,chemistry ,Optoelectronics ,General Materials Science ,Work function ,0210 nano-technology ,business ,Layer (electronics) ,Perovskite (structure) - Abstract
The inevitable interfacial defects in the under layer of perovskite films still hinder the power conversion efficiency (PCE) and stability of perovskite solar cells (PSCs), especially of large-area flexible devices up-scaled by roll-to-roll (R2R) technology. Herein, we demonstrate an in situ bifacial passivation strategy via a simple hydroiodic acid (HI) soaking of NiOx-based hole transport layer during R2R printing. Concretely, the trivalent nickel compound on the film surface is reduced to nickel iodide (NiI2) by a HI redox reaction, thereby optimizing the interface contact and ameliorating the work function. Meanwhile, NiI2 coordinates with lead atoms in the perovskite to form a Pb–I bond, which induces the orderly growth of the perovskite lattice and enhances the quality of the crystalline film. Consequently, the PCE of the optimized flexible devices reaches up to 19.04% (1 cm2) and 16.15% (15 cm2). Moreover, the stability and mechanical property of these devices are also improved. This work provides a deep understanding of the NiOx/perovskite interface and an approach for printable interface optimization.
- Published
- 2021
32. Chiral Phase-Transfer Catalysts with Hydrogen Bond: A Powerful Tool in the Asymmetric Synthesis
- Author
-
Hongyu Wang
- Subjects
phase-transfer catalysis ,asymmetric synthesis ,hydrogen bond ,bifunctional catalysts ,asymmetric phase-transfer catalysis ,Chemical technology ,TP1-1185 ,Chemistry ,QD1-999 - Abstract
Asymmetric phase-transfer catalysis has been widely applied into organic synthesis for efficiently creating chiral functional molecules. In the past decades, chiral phase-transfer catalysts with proton donating groups are emerging as an extremely significant strategy in the design of novel catalysts, and a large number of enantioselective reactions have been developed. In particular, the proton donating groups including phenol, amide, and (thio)-urea exhibited unique properties for cooperating with the phase-transfer catalysts, and great advances on this field have been made in the past few years. This review summarizes the seminal works on the design, synthesis, and applications of chiral phase-transfer catalysts with strong hydrogen bonding interactions.
- Published
- 2019
- Full Text
- View/download PDF
33. Spiderweb-Like Fe-Co Prussian Blue Analogue Nanofibers as Efficient Catalyst for Bisphenol-A Degradation by Activating Peroxymonosulfate
- Author
-
Hongyu Wang, Chaohai Wang, Junwen Qi, Yubo Yan, Ming Zhang, Xin Yan, Xiuyun Sun, Lianjun Wang, and Jiansheng Li
- Subjects
Fe-Co Prussian blue analogues ,electrospinning ,peroxymonosulfate ,BPA ,Chemistry ,QD1-999 - Abstract
Prussian blue and its analogues (PBA) based nanomaterials have been widely applied to removing pollutants in the recent years. However, easy aggregation and poor recycling largely limit their practical applications. In this work, spiderweb-like Fe-Co Prussian blue analogue/polyacrylonitrile (FCPBA/PAN) nanofibers were prepared by electrospinning and applied to degrading bisphenol-A (BPA) by activating peroxymonosulfate (PMS). Detailed characterization demonstrated that a high loading of FCPBA (86% of FCPBA in FCPBA/PAN) was successfully fixed on the PAN nanofibers. 67% of BPA was removed within 240 min when 500 mg·L−1 PMS and 233 mg·L−1 FCPBA/PAN were introduced in 20 mg·L−1 BPA solution at initial pH of 2.8. Electron paramagnetic resonance (EPR) and radical inhibition experiments were performed to identify the possible degradation mechanism. For comparison, a low loading of FCPBA nanofibers (0.6FCPBA/PAN nanofibers, 43% of FCPBA in FCPBA/PAN) were also prepared and tested the catalytic performance. The results showed that the activity of FCPBA/PAN was much higher than 0.6FCPBA/PAN. Furthermore, a FCPBA/PAN packed column was made as a reactor to demonstrate the reusability and stability of FCPBA/PAN nanofibers, which also exhibited the bright future for the industrial application. This work makes it possible to fabricate efficient PBA nanocatalysts with excellent recyclability and promotes the application of PBA in industrial areas.
- Published
- 2019
- Full Text
- View/download PDF
34. Intercalation Behavior of Tetrafluoroborate Anion in a Graphite Electrode from Mixed Cyclic Carbonates
- Author
-
Dandan Zhu, Yuhao Huang, Yunju Wang, Lei Zhang, Shufang Zhao, and Hongyu Wang
- Subjects
Battery (electricity) ,Tetrafluoroborate ,Materials science ,Inorganic chemistry ,Intercalation (chemistry) ,Energy Engineering and Power Technology ,Electrolyte ,chemistry.chemical_compound ,chemistry ,Propylene carbonate ,Electrode ,Materials Chemistry ,Electrochemistry ,Chemical Engineering (miscellaneous) ,Graphite ,Electrical and Electronic Engineering ,Ethylene carbonate - Abstract
In a dual-ion battery with an electrolyte solution, the anion storage behavior of graphite positive electrode is heavily dependent on anion solvation. In 1 M LiBF4 solutions dissolved in cyclic car...
- Published
- 2020
35. Anion Intercalation into a Graphite Electrode from Trimethyl Phosphate
- Author
-
Hongyu Wang and Lei Zhang
- Subjects
Materials science ,Inorganic chemistry ,Intercalation (chemistry) ,Lithium tetrafluoroborate ,chemistry.chemical_element ,02 engineering and technology ,Lithium hexafluorophosphate ,010402 general chemistry ,021001 nanoscience & nanotechnology ,Electrochemistry ,01 natural sciences ,0104 chemical sciences ,Trimethyl phosphate ,chemistry.chemical_compound ,chemistry ,Electrode ,General Materials Science ,Lithium ,Graphite ,0210 nano-technology - Abstract
Trimethyl phosphate (TMP) is a flame-retardant solvent frequently used in nonaqueous electric energy storage devices. Anions can hardly intercalate into a graphite positive electrode from neat TMP at ordinary conditions. In TMP solutions, dissolving lithium hexafluorophosphate (LiPF6), lithium tetrafluoroborate (LiBF4), lithium bis(fluorosulfonyl)imide (LiFSI), and lithium bis(trifluoromethanesulfonimide) (LiTFSI), by means of increasing lithium salt concentration or increasing the charge cutoff voltage of Li/graphite cells, the TMP-solvated anions can successfully intercalate into graphite positive electrodes. Moreover, the effect of TFSI- activation on a graphite electrode is addressed. Ex situ X-ray diffraction measurements in combination with traditional electrochemical tests are employed to investigate the crystal structure change and electrochemical performance of graphite electrodes, respectively. Nuclear magnetic resonance, Fourier-transform infrared, and Raman spectroscopy are employed to characterize the TMP solutions.
- Published
- 2020
36. Tetrafluoroborate Anion Intercalation into Graphite Electrode from Sulfolane
- Author
-
Yuhao Huang, Hongyu Wang, and Yunju Wang
- Subjects
Tetrafluoroborate ,010405 organic chemistry ,Inorganic chemistry ,Lithium tetrafluoroborate ,General Chemistry ,Electrolyte ,Anion intercalation ,010402 general chemistry ,01 natural sciences ,0104 chemical sciences ,Ion ,chemistry.chemical_compound ,chemistry ,Electrode ,Graphite ,Sulfolane - Abstract
Electrolyte solutions of lithium tetrafluoroborate dissolved in sulfolane are applied in dual-ion batteries. A graphite positive electrode in this kind of solutions delivers a reversible anion stor...
- Published
- 2021
37. Removal of Organic Micropollutants from Water by Macrocycle‐Containing Covalent Polymer Networks
- Author
-
Xiaofan Ji, Hu Wang, Hongyu Wang, Tian Zhao, Zachariah A. Page, Niveen M. Khashab, and Jonathan L. Sessler
- Subjects
chemistry.chemical_classification ,ComputingMilieux_THECOMPUTINGPROFESSION ,Polymers ,010405 organic chemistry ,InformationSystems_INFORMATIONSYSTEMSAPPLICATIONS ,Supramolecular chemistry ,Water ,Portable water purification ,General Medicine ,General Chemistry ,Polymer ,010402 general chemistry ,01 natural sciences ,GeneralLiterature_MISCELLANEOUS ,Catalysis ,Water Purification ,0104 chemical sciences ,chemistry ,Chemical engineering ,Covalent bond ,Self-assembly ,Science, technology and society ,Water Pollutants, Chemical ,MathematicsofComputing_DISCRETEMATHEMATICS - Abstract
Access to clean drinking water is a recognized societal need that touches on the health and livelihood of millions of people worldwide. This is providing an incentive to develop new water-treatment technologies. Traditional technologies, while widespread, are usually inefficient at removing organic pollutants from sewage or so-called grey water. Macrocycle-containing covalent polymer networks have begun to attract attention in the context of water treatment owing to the inherent stability provided by the polymer backbones and their ability to capture micropollutant guests as the result of tunable macrocycle-based host-guest interactions. In this Minireview, we summarize recent advances (from 2016 to mid-2020) involving the removal of organic micropollutants from water using macrocycle-containing covalent polymer networks. An overview of future challenges within this subfield is also provided.
- Published
- 2020
38. Improving the Fill Factor of Perovskite Solar Cells by Employing an Amine-tethered Diketopyrrolopyrrole-Based Polymer as the Dopant-free Hole Transport Layer
- Author
-
Weibo Gao, Hongyu Wang, Maria Khalil, Mu Zhu, Wenbo Liu, Wei-Shi Li, Yiming Ma, Zongrui Wang, Qichun Zhang, Weijun Fan, and Jiandong Wang
- Subjects
chemistry.chemical_classification ,Materials science ,Dopant ,Doping ,Energy Engineering and Power Technology ,Hole transport layer ,Polymer ,Chemical engineering ,chemistry ,Materials Chemistry ,Electrochemistry ,Chemical Engineering (miscellaneous) ,Fill factor ,Amine gas treating ,Electrical and Electronic Engineering ,Perovskite (structure) - Abstract
Although rapid progress has been witnessed recently in regular perovskite solar cells (PSCs), one of the bottlenecks to delay their industrialization is the complicated and poor reproducible doping...
- Published
- 2020
39. Lithium Difluorophosphate as an Effective Additive for Improving the Initial Coulombic Efficiency of a Silicon Anode
- Author
-
Deliang Chen, Weicheng Zhu, Zhenyu Yang, Chao Li, Yongjun Xu, Huibin Yin, Xiangxuan Huang, Hongyu Wang, and Banggui Lao
- Subjects
chemistry.chemical_compound ,Materials science ,chemistry ,Chemical engineering ,Electrochemistry ,chemistry.chemical_element ,Silicon anode ,Lithium ,Difluorophosphate ,Catalysis ,Faraday efficiency - Published
- 2020
40. Microwave‐Synthesized TiO 2 Nanotube as a Durable Li + ‐Storage Electrode Material
- Author
-
Hongyu Wang and Xiaohong Wang
- Subjects
Electrode material ,Materials science ,Chemical engineering ,chemistry ,Tio2 nanotube ,chemistry.chemical_element ,Lithium ,General Chemistry ,Microwave - Published
- 2020
41. Cooperation of Dimethyl and Diethyl Carbonates in Hexafluorophosphate Anion Intercalation into Graphite Electrode
- Author
-
Hongyu Wang and Yuhao Huang
- Subjects
Materials science ,Inorganic chemistry ,Intercalation (chemistry) ,Diethyl carbonate ,02 engineering and technology ,Surfaces and Interfaces ,Electrolyte ,010402 general chemistry ,021001 nanoscience & nanotechnology ,Condensed Matter Physics ,Electrochemistry ,01 natural sciences ,0104 chemical sciences ,chemistry.chemical_compound ,chemistry ,Hexafluorophosphate ,Carbonate ,General Materials Science ,Graphite ,Dimethyl carbonate ,0210 nano-technology ,Spectroscopy - Abstract
In dual-ion batteries, electrolyte solutions must comply with the positive electrodes of anion graphite intercalation compounds. The solutions of LiPF6 dissolved into ethylmethyl carbonate (EMC) cater to this need. In this paper, the mixtures of dimethyl carbonate (DMC) and diethyl carbonate (DEC) are employed in charge of EMC. The storage of PF6- synergistically solvated by both DMC and DEC in graphite has been identified by in/ex situ XRD measurements and conventional electrochemical tests. An optimized electrochemical performance in the solution of LiPF6-DEC/DMC is achieved if the volume ratio of DEC/DMC equals to 4. The solvation states in the LiPF6-DMC/DEC solutions are characterized by IR spectra analysis.
- Published
- 2020
42. Fabrication and growth mechanism of ultra-crystalline C60 on silicon substrate in vacuum
- Author
-
Stephen J. Pennycook, Shu Hearn Yu, Hongyu Wang, Meng Seng Tan, Ashutosh Rath, and Daniel H. C. Chua
- Subjects
Materials science ,Fabrication ,Silicon ,Scanning electron microscope ,Energy Engineering and Power Technology ,chemistry.chemical_element ,02 engineering and technology ,010402 general chemistry ,01 natural sciences ,Inorganic Chemistry ,symbols.namesake ,X-ray photoelectron spectroscopy ,Materials Chemistry ,Renewable Energy, Sustainability and the Environment ,business.industry ,Process Chemistry and Technology ,Organic Chemistry ,Recrystallization (metallurgy) ,021001 nanoscience & nanotechnology ,0104 chemical sciences ,chemistry ,Transmission electron microscopy ,Ceramics and Composites ,symbols ,Optoelectronics ,0210 nano-technology ,business ,Raman spectroscopy ,Powder diffraction - Abstract
We report a simple procedure to fabricate single crystals 3D C60 having an FCC structure on silicon substrates using a vapour–solid set-up in vacuum conditions. The morphology of the deposited film can be tuned by controlling the temperature and position of the substrate. The as-fabricated samples are extensively characterised by transmission electron microscopy, scanning electron microscope, X-ray powder diffraction, Raman spectroscopy, X-ray photoelectron spectroscopy and nano-indentation, which allow us to shed light on the recrystallization process of the C60. In addition, the growth mechanism of the formation of crystalline 3D structure of the C60 film is discussed in detail. Based on the newly gained knowledge of mechanism and its unique properties, fullerene has shown huge potential as a solid lubricant on various kinds of substrates.
- Published
- 2020
43. Carbon nano-beads collected from candle soot as an anode material with a highly pseudocapacitive Na+ storage capability for dual-ion batteries
- Author
-
Hongyu Wang, Li Qi, and Xiaohong Wang
- Subjects
Battery (electricity) ,Materials science ,General Chemical Engineering ,General Engineering ,General Physics and Astronomy ,chemistry.chemical_element ,02 engineering and technology ,Electrolyte ,010402 general chemistry ,021001 nanoscience & nanotechnology ,Electrochemistry ,01 natural sciences ,Cathode ,Pseudocapacitance ,0104 chemical sciences ,law.invention ,Anode ,Chemical engineering ,chemistry ,law ,General Materials Science ,Graphite ,0210 nano-technology ,Carbon - Abstract
Candle soot has been collected and applied as an active material for Na+-storage anode. The candle soot anode exhibits high reversible capacity and superior rate performance, and this is mainly determined by the pseudocapacitance of Na+ cations. The pre-sodiated candle soot anode is coupled with a graphite cathode using a Na-based organic electrolyte to construct a dual-ion battery. Dual-ion batteries display a wide potential window (0–4.7 V), superior cyclic stability (1400 cycles with the retention of 92.3%), and an outstanding rate capability (111 mAh g−1 at a current density of 2 A g−1).
- Published
- 2020
44. Enantioselective Vinylogous Mannich‐Type Reactions to Construct CF 3 S‐Containing Stereocenters Catalysed by Chiral Quaternary Phosphonium Salts
- Author
-
Changwu Zheng, Jun Liu, Lijun Xu, Hongyu Wang, Longhui Yu, and Gang Zhao
- Subjects
chemistry.chemical_compound ,chemistry ,Stereochemistry ,Enantioselective synthesis ,General Chemistry ,Phosphonium ,Stereocenter - Published
- 2020
45. Engaging α-Fluorocarboxylic Acids Directly in Decarboxylative C–C Bond Formation
- Author
-
Yee Ann Ho, Osvaldo Gutierrez, Chen-Fei Liu, Mingbin Yuan, Zhihui Song, Hongyu Wang, and Ming Joo Koh
- Subjects
010405 organic chemistry ,Decarboxylation ,chemistry.chemical_element ,General Chemistry ,Bond formation ,010402 general chemistry ,01 natural sciences ,Medicinal chemistry ,Chemical synthesis ,Catalysis ,0104 chemical sciences ,Organic molecules ,chemistry ,Fluorine - Abstract
Fluorine-containing organic molecules, particularly those that bear (sp3)C–F bonds, are rapidly gaining prominence in modern chemical synthesis. Although extensive studies have been devoted to the ...
- Published
- 2020
46. Investigation on electrochemical behavior and surface conductivity of titanium carbide modified Ti bipolar plate of PEMFC
- Author
-
Jiefu Shi, Xinyu Wang, Yingshui Yu, Juncai Sun, Pengchao Zhang, Hongyu Wang, and Yuetong Han
- Subjects
congenital, hereditary, and neonatal diseases and abnormalities ,Materials science ,Titanium carbide ,Renewable Energy, Sustainability and the Environment ,Contact resistance ,Energy Engineering and Power Technology ,Proton exchange membrane fuel cell ,02 engineering and technology ,010402 general chemistry ,021001 nanoscience & nanotechnology ,Condensed Matter Physics ,Microstructure ,Electrochemistry ,01 natural sciences ,0104 chemical sciences ,Contact angle ,Surface conductivity ,chemistry.chemical_compound ,Fuel Technology ,chemistry ,mental disorders ,Composite material ,0210 nano-technology ,Polarization (electrochemistry) - Abstract
The titanium carbide (TiC) modified layer is prepared by plasma surface modification technology on the surface of Ti plate (TA1) to meet the performance requirements of bipolar plate of PEMFC. The microstructure characterization confirms that a compact and defectless TiC modified layer is formed on the surface of Ti bipolar plate. The corrosion current density of TiC modified plate in simulated PEMFC environment is reduced by approximately an order of magnitude and the self-corrosion potential is significantly improved compared with bare Ti plate. The interfacial contact resistance (ICR) of TiC modified plate (7.5 mΩ cm2, under loading pressure of 140 N) is evidently lower than bare Ti plate (98.1 mΩ cm2). Even after potentiostatic polarization, the ICR of TiC modified plate still remains at satisfactory values. Furthermore, the contact angle of TiC modified plate reaches a higher value of 112°, which is beneficial to the water discharge of PEMFC.
- Published
- 2020
47. The Relationship Between Serum Bilirubin Levels and Peripheral Arterial Disease and Gender Difference in Patients With Hypertension: BEST Study
- Author
-
Yang Lan, Jinbo Liu, Huan Liu, Hongwei Zhao, and Hongyu Wang
- Subjects
Male ,China ,medicine.medical_specialty ,Arterial disease ,Bilirubin ,030204 cardiovascular system & hematology ,Gastroenterology ,Peripheral Arterial Disease ,03 medical and health sciences ,chemistry.chemical_compound ,Sex Factors ,0302 clinical medicine ,Internal medicine ,Humans ,Medicine ,Ankle Brachial Index ,In patient ,030212 general & internal medicine ,business.industry ,Venous blood ,Odds ratio ,Middle Aged ,Confidence interval ,Peripheral ,chemistry ,Hypertension ,Female ,Cardiology and Cardiovascular Medicine ,business ,Biomarkers ,TBIL - Abstract
We evaluated the relationship between serum bilirubin levels and ankle-brachial index (ABI) to determine whether gender affected the relationship between bilirubin levels and peripheral arterial disease (PAD) in patients with hypertension. A total of 543 patients were included in our studies (78 patients with PAD and 465 without PAD). Peripheral arterial disease was defined as ABI
- Published
- 2020
48. Degradable Carbon–Silica Nanocomposite with Immunoadjuvant Property for Dual-Modality Photothermal/Photodynamic Therapy
- Author
-
Shuang Liu, Qipeng Yuan, Huiyu Liu, Fengrong Zhang, Jie Ma, Xueting Pan, Hongyu Wang, Kai Gu, Zhijun Huang, Xiaotong Wang, Heyun Shen, Weiwei Wang, and Wei Yuan
- Subjects
Cell Survival ,Surface Properties ,medicine.medical_treatment ,Cancer therapy ,Mice, Nude ,General Physics and Astronomy ,Breast Neoplasms ,Photodynamic therapy ,02 engineering and technology ,010402 general chemistry ,01 natural sciences ,Immunoadjuvant ,Nanocomposites ,Mice ,Adjuvants, Immunologic ,Antigens, Neoplasm ,In vivo ,Cell Line, Tumor ,medicine ,Animals ,General Materials Science ,Silica nanocomposite ,Particle Size ,Mice, Inbred BALB C ,Photosensitizing Agents ,Nanocomposite ,Chemistry ,Optical Imaging ,General Engineering ,Mammary Neoplasms, Experimental ,Dendritic Cells ,Phototherapy ,Photothermal therapy ,Silicon Dioxide ,021001 nanoscience & nanotechnology ,Carbon ,0104 chemical sciences ,Photochemotherapy ,Cancer research ,Dual modality ,0210 nano-technology - Abstract
Carbon nanomaterials have flourished for cancer therapy for decades. However, their practical applications on clinical bases still pose a challenge to address the dilemma of metabolism in vivo. In this study, an attempt is made to design a degradable carbon-silica nanocomposite (CSN) with immunoadjuvant property, which could undergo an enzyme-free degradation process into small particles (∼5 nm) and facilitate its clinical application. CSN harbors photothermal and photodynamic properties and as an immunoadjuvant would help to generate tumor-associated antigens and mature dendritic cells (DCs). Potent antitumor effects have been achieved in both 4T1 and patient-derived xenograft tumor models with tumor inhibition efficiencies of 93.2% and 92.5%, respectively. We believe that this strategy will benefit the possible clinical translation and carbon-silica-nanomaterial-based cancer therapy.
- Published
- 2020
49. Controllable Fe/HCS catalysts in the Fischer-Tropsch synthesis: Effects of crystallization time
- Author
-
Yifei Wang, Xinsheng Teng, Hongyu Wang, Qiao Zhao, Shouying Huang, Yue Wang, Xinbin Ma, and Jian Wang
- Subjects
Materials science ,Hydrogen ,General Chemical Engineering ,chemistry.chemical_element ,Fischer–Tropsch process ,02 engineering and technology ,010402 general chemistry ,021001 nanoscience & nanotechnology ,01 natural sciences ,0104 chemical sciences ,Catalysis ,law.invention ,Adsorption ,chemistry ,Chemical engineering ,law ,Crystallization ,0210 nano-technology ,Spectroscopy ,Carbon ,Syngas - Abstract
The Fischer-Tropsch synthesis (FTS) continues to be an attractive alternative for producing a broad range of fuels and chemicals through the conversion of syngas (H2 and CO), which can be derived from various sources, such as coal, natural gas, and biomass. Among iron carbides, Fe2C, as an active phase, has barely been studied due to its thermodynamic instability. Here, we fabricated a series of Fe2C embedded in hollow carbon sphere (HCS) catalysts. By varying the crystallization time, the shell thickness of the HCS was manipulated, which significantly influenced the catalytic performance in the FTS. To investigate the relationship between the geometric structure of the HCS and the physic-chemical properties of Fe species, transmission electron microscopy, X-ray diffraction, N2 physical adsorption, X-ray photo-electron spectroscopy, hydrogen temperature-programmed reduction, Raman spectroscopy, and Mossbauer spectroscopy techniques were employed to characterize the catalysts before and after the reaction. Evidently, a suitable thickness of the carbon layer was beneficial for enhancing the catalytic activity in the FTS due to its high porosity, appropriate electronic environment, and relatively high Fe2C content.
- Published
- 2020
50. DNA Logic Multiplexing Using Toehold-Mediated Strand Displacement
- Author
-
Jin Xu, Hongyu Wang, Enqiang Zhu, Xiaolong Shi, and Congzhou Chen
- Subjects
demultiplexer ,General Computer Science ,Computer science ,Reliability (computer networking) ,02 engineering and technology ,Integrated circuit ,010402 general chemistry ,01 natural sciences ,Multiplexer ,Multiplexing ,law.invention ,chemistry.chemical_compound ,DNA computing ,law ,DNA strand displacement ,logic circuits ,Electronic engineering ,General Materials Science ,Electrical and Electronic Engineering ,Hardware_ARITHMETICANDLOGICSTRUCTURES ,INHIBIT gate ,Electronic circuit ,General Engineering ,021001 nanoscience & nanotechnology ,0104 chemical sciences ,chemistry ,Logic gate ,lcsh:Electrical engineering. Electronics. Nuclear engineering ,0210 nano-technology ,lcsh:TK1-9971 ,DNA ,Hardware_LOGICDESIGN - Abstract
Since the discovery of the DNA Strand Displacement mechanism, researchers have implemented a lot of applications, such as DNA computing, DNA Circuits, Logic gates, and Chemical Reaction network. To achieve those functions, a well-designed system is essential, among which the toehold domains and migration domains play a vital role. In this paper, we designed three basic logic gates based on the toehold mediates DNA strand displacement mechanism, and utilized them to struct a three-layer multiplexer DNA logic circuit. However, the traditional INHIBIT gate annihilated all the inputs strands which obscure the multiplexer in further applications. Therefore, we improved the INHIBIT gate, so the desired input strand can be selected, and the corresponding output strand can be identified. Lastly, we adjusted the multiplexer and realized a cyclic DNA circuit. The simulation results verified the efficiency and reliability of our multiplexer DNA logic circuits. Our method has the ability in architecting complex DNA integrated circuits.
- Published
- 2020
Catalog
Discovery Service for Jio Institute Digital Library
For full access to our library's resources, please sign in.