27 results on '"Song, Zhao"'
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2. Modification of BiVO4 with partially covered α-Fe2O3 spindles serving as hole-transport channels for significantly improved photoelectrochemical performance
- Author
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Li, Jinglin, Li, Jiaxin, Yuan, Hao, Zhang, Wenjie, Jiao, Zhengbo, and Song Zhao, Xiu
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- 2020
- Full Text
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3. Fluorinated metal–organic frameworks for enhanced stability and iodine adsorption selectivity under humid conditions
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Wen Zhang, Jian Zhang, Xiuting Dong, Menglin Li, Qing He, Song Zhao, and Lixin Xie
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General Chemical Engineering ,Environmental Chemistry ,General Chemistry ,Industrial and Manufacturing Engineering - Published
- 2023
4. Waste-cellulose-derived porous carbon adsorbents for methyl orange removal
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Xiu Song Zhao, Hongliang Li, Xuehua Liu, Chuanhui Zhang, Yanan Yuan, Baofen Sun, Fuan Guo, Kean Wang, and Xingyun Li
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Langmuir ,General Chemical Engineering ,chemistry.chemical_element ,02 engineering and technology ,General Chemistry ,010402 general chemistry ,021001 nanoscience & nanotechnology ,01 natural sciences ,6. Clean water ,Industrial and Manufacturing Engineering ,0104 chemical sciences ,chemistry.chemical_compound ,Cellulose fiber ,Adsorption ,chemistry ,Chemical engineering ,Specific surface area ,Methyl orange ,Environmental Chemistry ,Freundlich equation ,Cellulose ,0210 nano-technology ,Carbon - Abstract
High-performance nitrogen-doped porous carbon adsorbents were prepared from waste cellulose fibers using the spray-drying method and used to remove methyl orange (MO) from water. The carbon adsorbents possessed a honeycomb-like turbostratic microstructure with hierarchical pores. Such waste-cellulose-derived carbon adsorbents were found to exhibit a fast adsorption rate towards MO. A sample thermally treated at 800 °C with the highest specific surface area (about 1259.4 m2/g) and total pore volume (about 2.7 cm3/g) exhibited the best MO adsorption capacity (337.8 mg/g), which is significantly higher than that of ZnCl2-activated carbon. The effect of MO initial concentration, pH and temperature on the carbon adsorption was investigated systematically. It was found that the adsorption system is heterogeneous while the isotherm data on the carbon sample can be well described by both Langmuir and Freundlich isotherm models. The high-performance and cost-effective carbon adsorbent described in this paper holds a great promise for dye removal from aqueous solutions.
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- 2019
5. Electrocapacitive desalination with nitrogen-doped hierarchically structured carbon prepared using a sustainable salt-template method
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Kaige Sun, Chao Wang, Mike Tebyetekerwa, and Xiu Song Zhao
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General Chemical Engineering ,Environmental Chemistry ,General Chemistry ,Industrial and Manufacturing Engineering - Published
- 2022
6. Functional metal–organic framework as high-performance adsorbent for selective enrichment of pharmaceutical contaminants in aqueous samples
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Xiaodong Bi, Ling-Xi Zhao, Meng Xie, Chong Zhang, Jin-Ming Lin, and Ru-Song Zhao
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General Chemical Engineering ,Environmental Chemistry ,General Chemistry ,Industrial and Manufacturing Engineering - Published
- 2022
7. Nanofiltration membrane with crown ether as exclusive Li+ transport channels achieving efficient extraction of lithium from salt lake brine
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Hongwei Li, Ying Wang, Tingyu Li, Xiang-Kui Ren, Jixiao Wang, Zhi Wang, and Song Zhao
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General Chemical Engineering ,Environmental Chemistry ,General Chemistry ,Industrial and Manufacturing Engineering - Published
- 2022
8. Facile room-temperature synthesis of a spherical mesoporous covalent organic framework for ultrasensitive solid-phase microextraction of phenols prior to gas chromatography-tandem mass spectrometry
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Ru-Song Zhao, Li-Zong Chen, Lei Li, Jin-Ming Lin, Wei-Kun Meng, Guiju Xu, Lu Liu, Xia Wang, and Ming-Lin Wang
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Aqueous solution ,Gas Chromatography/Tandem Mass Spectrometry ,Chemistry ,General Chemical Engineering ,02 engineering and technology ,General Chemistry ,010402 general chemistry ,021001 nanoscience & nanotechnology ,Mass spectrometry ,Solid-phase microextraction ,01 natural sciences ,Industrial and Manufacturing Engineering ,0104 chemical sciences ,symbols.namesake ,Adsorption ,Chemical engineering ,symbols ,Environmental Chemistry ,van der Waals force ,0210 nano-technology ,Mesoporous material ,Covalent organic framework - Abstract
High-performance extraction of polar phenols from aqueous samples is challenging because of their hydrophilicity, extremely low concentration, and complicated matrices. Covalent organic frameworks (COFs) are new types of porous organic materials. In this work, spherical TPB-DMTP-COF was fabricated via a simple room-temperature solution-phase approach. The material exhibited high acid/base stability, remarkable thermostability, high crystallinity, and large surface area of 1560 m2 g−1 and thus could be an excellent coating for solid-phase microextraction (SPME) of phenols. This coating provided superior adsorption affinity toward phenols over commercial coatings. TPB-DMTP-coated fiber showed high enhancement factors (EFs, 1741–4265), and EFs increased with the number of chlorine or methyl substituents and high hydrophobicity of phenols. Hence, the strong adsorption affinity could be derived from hydrophobic and steric hindrance effects together with π−π affinity, H-bonding, van der Waals forces, and size-matching effect. The proposed approach based on TPB-DMTP-COF-coated fiber and gas chromatography-tandem mass spectrometry achieved low limits of detection (0.0048–0.015 ng L−1), wide linearity (0.05–1000 ng L−1), good precision (
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- 2019
9. Undamaged depositing large-area ZnO quantum dots/RGO films on photoelectrodes for the construction of pure Z-scheme
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Binghui Xu, Xiu Song Zhao, Yingpu Bi, Qiming Wang, Min Wang, Xianggang Guan, and Zhengbo Jiao
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Electron mediator ,Materials science ,Fabrication ,Aqueous solution ,General Chemical Engineering ,02 engineering and technology ,General Chemistry ,Electron ,010402 general chemistry ,021001 nanoscience & nanotechnology ,01 natural sciences ,Redox ,Industrial and Manufacturing Engineering ,0104 chemical sciences ,Chemical engineering ,Quantum dot ,Agglomerate ,Environmental Chemistry ,0210 nano-technology ,Deposition (law) - Abstract
In this work, we have firstly proposed a mild and facile method to deposit large-area RGO and ZnO QDs/RGO films on diverse substrates through a self-assembly strategy. RGO powders would aggregate to agglomerate in aqueous solution due to its hydrophobicity. Interestingly, it is found that RGO sheets would assemble to film when RGO ethanol solution is dropped into water, and the film layers could be rationally tuned by repeating the deposition procedure. Based on the convenient fabrication method, a co-current Z-scheme system could be constructed by subsequently depositing RGO and ZnO QDs/RGO films on FeVO4 photoelectrodes, in which RGO serves as an electron mediator. Different from the traditional disordered Z-scheme system, the photo-excited electrons in co-current Z-scheme would move toward the same direction due to the absolute separation between FeVO4 and ZnO. As a result, the PEC performances of FeVO4 could be significantly enhanced because the running direction of photo-excited electrons in co-current Z-scheme is consistent with that in external circuit. For comparison, a counter-current Z-scheme has also been built up by replacing FeVO4 with WO3, in which the ruing direction of photo-generated electrons is opposite to the external circuit, and the photo conversion efficiency decreased consequently. Therefore, it can be concluded that the design of pure Z-scheme is not only beneficial for improving the charge separation efficiency and retaining their redox capability, but also favorable for uncovering the charge transfer mechanism.
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- 2019
10. β-Ketoenamine-linked covalent organic framework coating for ultra-high-performance solid-phase microextraction of polybrominated diphenyl ethers from environmental samples
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Wei-Kun Meng, Lu Liu, Guiju Xu, Ru-Song Zhao, Yan-Sheng Zhou, Ming-Lin Wang, Jin-Ming Lin, and Xia Wang
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Detection limit ,Materials science ,General Chemical Engineering ,02 engineering and technology ,General Chemistry ,engineering.material ,010402 general chemistry ,021001 nanoscience & nanotechnology ,Solid-phase microextraction ,01 natural sciences ,Industrial and Manufacturing Engineering ,0104 chemical sciences ,Crystallinity ,Polybrominated diphenyl ethers ,Chemical engineering ,Coating ,Specific surface area ,engineering ,Environmental Chemistry ,Thermal stability ,0210 nano-technology ,Covalent organic framework - Abstract
Covalent organic frameworks (COFs) via Schiff base-type linkages (1,3,5-triformylphloroglucinol–paraphenylenediamine, TpPa-1), as an ideal coating, possesses significant potential for solid-phase microextraction (SPME) due to their fascinating properties, such as outstanding thermal and chemical stabilities, inherent porosity, and high crystallinity. A novel SPME device was fabricated based on TpPa-1 as an enrichment coating for capturing trace polybrominated diphenyl ethers (PBDEs). This TpPa-1 coating exhibited a superior enrichment capacity in “catching” PBDEs over commercial SPME fibers. Such performance is attributed to multiple factors, including the coating’s hydrophobic nature, π-π stacked architectures, large specific surface area, high thermal stability, and size-matching effect. High enhancement factors of 2035–6859, low detection limits of 0.0058–0.022 ng L−1, satisfactory linear range of 0.01–100 ng L−1, good repeatability of 4.86%–9.33%, and excellent reproducibility of 5.62%–9.85% were achieved. Finally, as expected, as the most sensitive SMPE technique for detecting PBDEs, to the best of our knowledge, the developed SPME procedure in combination with gas chromatography–negative chemical ion–mass spectrometry analysis was proven to be ultrasensitive, dependable, and practical in analyzing PBDE species in real water. These exceptional results signify that the proposed method offers a fresh prospect to extend the potential applications of COFs to pick up pollutants at ultra-low levels from environmental samples.
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- 2019
11. Activate persulfate for catalytic degradation of adsorbed anthracene on coking residues: Role of persistent free radicals
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Xuetao Guo, Dan Huang, Hanzhong Jia, Kecheng Zhu, Lan Wu, and Song Zhao
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General Chemical Engineering ,Radical ,chemistry.chemical_element ,02 engineering and technology ,010501 environmental sciences ,Photochemistry ,complex mixtures ,01 natural sciences ,Oxygen ,Industrial and Manufacturing Engineering ,law.invention ,chemistry.chemical_compound ,law ,Specific surface area ,Environmental Chemistry ,Electron paramagnetic resonance ,0105 earth and related environmental sciences ,Anthracene ,technology, industry, and agriculture ,Tar ,General Chemistry ,Coke ,021001 nanoscience & nanotechnology ,Persulfate ,chemistry ,0210 nano-technology - Abstract
Carbonaceous residues and polycyclic aromatic hydrocarbons (PAHs) are discharged simultaneously during the coke production. Chemical-structural properties of coking residues, such as coke powder, tar slag, and fly ash, were characterized by Fourier transform infrared spectroscopy, Brunauer–Emmett–Teller (BET) specific surface area, scanning electron microscopy (SEM), and electron paramagnetic resonance (EPR) techniques. Highly disorder amorphous structures with abundant of oxygen functionalities and persistent free radicals were observed for coke powder and tar slag. The potential activation of persistent free radicals (PFRs) on persulfate to generate reactive oxygen species (ROS) and induce the degradation of anthracene (ANT) was studied. The formation of H2O2 and decay rate of ANT highly correlate with the spin densities of bounded PFRs in coking residues. EPR technique combined with different radical scavengers was applied to investigate the generation of ROS. The results suggest that PFRs provide the electron to persulfate or/and O2, inducing the formation of SO4 −, H2O2, and OH. The produced ROS then back-reacts with adsorbed organic compounds, such as ANT, resulting in its oxidation and/or complete mineralization. The obtained results are relevant to the fate of adsorbed pollutants in coke-polluted soil environments and shed light on the development of remediation technologies for solid waste released during the coke production.
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- 2018
12. Sulfur encapsulation into yolk-shell Fe2N@nitrogen doped carbon for ambient-temperature sodium-sulfur battery cathode
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Xiu Song Zhao, Sha Li, Tanveer Hussain, Muhammad Kashif Aslam, Shu-Juan Bao, Hassina Tabassum, Wenwen Tang, Maowen Xu, and Zhong Wei
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Battery (electricity) ,Materials science ,General Chemical Engineering ,Sodium polysulfide ,chemistry.chemical_element ,General Chemistry ,Sulfur ,Industrial and Manufacturing Engineering ,Cathode ,Energy storage ,Sodium–sulfur battery ,law.invention ,Anode ,chemistry.chemical_compound ,chemistry ,Chemical engineering ,law ,Environmental Chemistry ,Polysulfide - Abstract
Room temperature sodium-sulfur (RT-Na-S) battery represents an advanced energy storage technology because of low cost and large theoretical energy density. However, RT-Na-S battery technology is facing severe challenges such as dissolution of sodium polysulfide, loss of active material on the surface of anode, serious shuttle effect and poor cycle stability. Herein, we synthesis hollow polar iron nitride nanoparticle encased N-doped carbon yolk shell (YS-Fe2N@NC) as sulfur carrier. The synergistic effect of YS-Fe2N@NC as well as wide void can be effectively trap polysulfides and improve the conductivity of sulfur-based cathode. The reversible reaction mechanism of Na-S battery is studied by in/ex-situ characterizations, catalytic behaviour of YS-Fe2N@NC and Density functional theory (DFT) calculations. The as made S/YS-Fe2N@NC composite exhibit promising specific capacity of 1123 mAh g−1 at the rate of 1C for the initial cycle, good rate capability (845 mAh g−1 at 2C) and ultra-stable cycling performance with an ultra-low capacity decay of 0.0724% per cycle. The present work highlights the importance of introducing the Fe2N to catalyse the conversion reactions of polysulfide within NC shell for boosting the RT-Na-S battery in term of high storage capacity, rate capability and stability.
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- 2022
13. Porous 3D superstructure of nitrogen doped carbon decorated with ultrafine cobalt nanodots as peroxymonosulfate activator for the degradation of sulfonamides
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Yan Li, Meng Xie, Jinhua Zhan, Shiyong Zhang, Lingshuai Kong, Ru-Song Zhao, and Ling-Xi Zhao
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inorganic chemicals ,Materials science ,Singlet oxygen ,General Chemical Engineering ,chemistry.chemical_element ,Nanoparticle ,General Chemistry ,Industrial and Manufacturing Engineering ,Catalysis ,law.invention ,chemistry.chemical_compound ,chemistry ,Chemical engineering ,law ,Environmental Chemistry ,Nanodot ,Electron paramagnetic resonance ,Carbon ,Cobalt ,Superstructure (condensed matter) - Abstract
Superstructures have attracted attention because of their potential applications in chemistry and materials science. In this work, we report the preparation of a porous 3D superstructure of nitrogen-doped carbon decorated with ultrafine cobalt nanodots (Co@NCSS) derived from the self-assembly of polyimide nanoparticles. Utilizing modified ultra-small cobalt nanodots as main catalytically active sites, and the excellent quality and electron transport efficiency generated by this 3D porous superstructure, Co@NCSS exhibited excellent catalytic performance as a peroxymonosulfate (PMS) activator towards the degradation of several sulfonamides. Based on radical scavenging tests and electron paramagnetic resonance (EPR), singlet oxygen (1O2) was the dominant oxidative species. Furthermore, through the identification of degradation intermediates by HPLC-MS and DFT calculation, the pathway of sulfamethoxazole (SMX) degradation by Co@NCSS/PMS was analyzed. The possible catalytic mechanism of Co@NCSS/PMS for SMX degradation is also proposed in this paper. Co@NCSS has the potential to be an ideal material for removing antibiotics from wastewater.
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- 2022
14. In-situ growth of double-layered polyaniline composite membrane for organic solvent nanofiltration
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Chenyue Mao, Guangqing Ma, Ying Wang, Jixiao Wang, Song Zhao, Pengpeng He, and Zhi Wang
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Materials science ,General Chemical Engineering ,Composite number ,Polyacrylonitrile ,02 engineering and technology ,General Chemistry ,010402 general chemistry ,021001 nanoscience & nanotechnology ,01 natural sciences ,Industrial and Manufacturing Engineering ,0104 chemical sciences ,chemistry.chemical_compound ,Aniline ,Membrane ,chemistry ,Polymerization ,Chemical engineering ,Polyaniline ,Environmental Chemistry ,Nanofiltration ,Phase inversion (chemistry) ,0210 nano-technology - Abstract
The trade-off between permeability and rejection limits the widespread application of organic solvent nanofiltration (OSN) membrane. As a promising membrane materials, polyaniline (PANI) has drawn increasing attention owing to its easy synthesis and excellent chemical stability. Nowadays, the reported PANI-based OSN membranes were fabricated by phase inversion process together with chemical crosslinking treatment. In this work, a novel double-layered polyaniline (PANI) composite OSN membrane was firstly developed through in-situ polymerization of aniline onto hydrolyzed polyacrylonitrile (HPAN) porous substrate. The separation performances of PANI/HPAN composite membrane were optimized by varying aniline concentration, polymerization time and oxidant:aniline ratio. The double-layered PANI/HPAN composite membrane prepared with 0.2 M aniline, 1 h polymerization and 1:4 oxidant:aniline ratio displayed ethanol permeance of 14.9 L∙m−2∙h−1∙bar−1 and rose bengal rejection of 98.1%. The membrane performance with the solvents including methanol, isopropanol, 1-butanol, acetone, n-hexane, and toluene were also tested, showing a molecular weight cut-off (MWCO) of 500 ∼ 600 g∙mol−1. In addition, the double-layered PANI/HPAN composite membrane maintained excellent and stable performance under strong acid soaking, ultrasonic vibration and continuous filtration
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- 2021
15. Covalent organic framework membranes with limited channels filling through in-situ grown polyaniline for efficient dye nanofiltration
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Chenyue Mao, Song Zhao, Zhi Wang, Jixiao Wang, and Pengpeng He
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Whole membrane ,Materials science ,General Chemical Engineering ,02 engineering and technology ,General Chemistry ,Permeance ,010402 general chemistry ,021001 nanoscience & nanotechnology ,01 natural sciences ,Industrial and Manufacturing Engineering ,0104 chemical sciences ,chemistry.chemical_compound ,Membrane ,Chemical engineering ,chemistry ,Polyaniline ,Environmental Chemistry ,Nanofiltration ,0210 nano-technology ,Porosity ,Layer (electronics) ,Covalent organic framework - Abstract
Due to the high porosity and ordered channels, covalent organic framework (COF) membranes with ultrathin selective layer and high permeance have gained increasing attention in the field of nanofiltration (NF). However, it remains a challenge to fabricate ultrathin and dense COF NF membranes with both high permeance and high rejection. This work presents a facile and efficient method to fabricate COF membrane with limited channel filling through in-situ growth of polyaniline (PANI) layer. Specifically, interfacial polymerized COF-TpPa membrane was fabricated with ~ 1.8 nm pore channel, and then the in-situ grown PANI layer could fill the partial of channels and reduce the effective pore size of COF-TpPa. The obtained PANI-TpPa composite membrane exhibited excellent performance with pure water permeance up to 85.2 L·m−2·h−1·bar−1, congo red rejection above 99.4%, and acid fuchsin rejection above 81.0%. The whole membrane fabrication just cost 3 h and took place at room temperature, which was much more efficient than other membranes with similar performance. Besides, the PANI-TpPa composite membrane showed excellent stability in acidic environment and organic solvent, and maintained great performance in long-term test.
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- 2021
16. Improvement of the electrocatalytic performance of FeP in neutral electrolytes with Fe nanoparticles
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Rohit Ranganathan Gaddam, Changlong Xiao, Yilan Wu, Xiu Song Zhao, Yibing Li, Xiaoming Sun, and Yan Liang
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Materials science ,Electrolysis of water ,General Chemical Engineering ,Inorganic chemistry ,02 engineering and technology ,General Chemistry ,Electrolyte ,Overpotential ,010402 general chemistry ,021001 nanoscience & nanotechnology ,Electrocatalyst ,01 natural sciences ,Industrial and Manufacturing Engineering ,0104 chemical sciences ,Catalysis ,chemistry.chemical_compound ,Adsorption ,Iron phosphide ,chemistry ,Environmental Chemistry ,0210 nano-technology ,Hydrogen production - Abstract
Metal phosphides are promising electrocatalysts for hydrogen evolution reaction (HER). However, their applications are hindered by the low electronic conductivity and sluggish HER kinetics in neutral electrolytes. Here we report an approach to significantly improving the HER performance of hierarchical iron phosphide (pFeP) modified with metallic iron (Fe) in neutral phosphate buffer electrolytes. It was observed that the presence of Fe can accelerate the charge transport kinetics. As a result, a significant improvement on the proton-acceptor (negatively charged P sites) and hydride-acceptor (coordinated Fe sites) were achieved, therefore promoting proton adsorption to the electrocatalyst surface during water electrolysis. Specifically, the Fe modified FeP electrocatalyst (pFe/FeP) displayed high HER catalytic rates (e.g., −100 mA cm−2 at an overpotential of −380 mV), low onset potential (50 mV), and excellent long-term stability for 40 h in neutral electrolyte. This study provides a new approach to the design and synthesis of noble-metal-free electrocatalysts with excellent performance for hydrogen production in neutral electrolytes.
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- 2021
17. Gradient composite film with calcium phosphate silicate for improved tendon -to-Bone intergration
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Jia Jiang, Guoming Xie, Kai Huang, Wei Su, Congqin Ning, Song Zhao, Jinzhong Zhao, Jiebo Chen, Junjie Xu, and Jingshu Guo
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Tape casting ,Scaffold ,Materials science ,General Chemical Engineering ,Composite number ,chemistry.chemical_element ,General Chemistry ,Calcium ,Matrix (biology) ,Enthesis ,Industrial and Manufacturing Engineering ,Silicate ,Tendon ,chemistry.chemical_compound ,medicine.anatomical_structure ,chemistry ,medicine ,Environmental Chemistry ,Composite material - Abstract
The tendon enthesis is a very complex tissue interface that connects a flexible tissue (tendon) to a stiff tissue (bone). Few available forms of gradient scaffolds with multiple components have been fabricated for applications in vivo because of the complexities of enthesis. In the present work, gradient-poly(e-caprolactone)/calcium phosphate silicate (G-P/C) composite films were fabricated with tape casting technique. Films with different P/C ratio were used to evaluate the material’s properties and effects of composition on cellular behaviors. The results showed that the G-P/C composite film offered a gradually changing composition transition. The higher levels of calcium phosphate silicate of each film stimulated stronger osteogenic differentiation and mineralized matrix deposition. When the films were interposed between the supraspinatus tendon and humerus bone, the G-P/C composite film group exhibited more tissue cellularity, better collagen alignment, better gradient mineralized cartilage formation and gradient Ca distribution than other groups. All these histological improvements were well consistent with the biomechanical results of the G-P/C composite film group. Thus, the G-P/C composite film may be a promising scaffold for tendon-to-bone interface engineering.
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- 2021
18. Cowpea-like bi-lineage nanofiber mat for repairing chronic rotator cuff tear and inhibiting fatty infiltration
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Wei Su, Jia Jiang, Tonghe Zhu, Kai Huang, Song Zhao, Jinzhong Zhao, Xuancheng Zhang, Chang’an Chen, and Yan Xiaoyu
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Surgical repair ,Chemistry ,General Chemical Engineering ,Rotator cuff injury ,02 engineering and technology ,General Chemistry ,Bone healing ,010402 general chemistry ,021001 nanoscience & nanotechnology ,medicine.disease ,01 natural sciences ,Industrial and Manufacturing Engineering ,0104 chemical sciences ,Tendon ,medicine.anatomical_structure ,In vivo ,Nanofiber ,medicine ,Environmental Chemistry ,Rotator cuff ,0210 nano-technology ,Bone regeneration ,Biomedical engineering - Abstract
The repair of chronic rotator cuff injury primarily depends on surgery to biomechanically strengthen the connection between the tendon and bone. There are numerous studies on tendon-to-bone healing to promote bone regeneration or collagen reconstruction in tendons. However, chronic rotator cuff injuries are often associated with fat infiltration, and few studies have taken this aspect into account, let alone overcome the two challenges of bone healing and fat infiltration at the same time. Here, inspired by the structure of cowpea (Vigna unguiculata), we have developed lithium-containing mesoporous silica combined with electrospun PEUU nanofibers (Li+@MSNs/PEUU), which can slowly release lithium ions, inhibiting rotator cuff fat infiltration, and promoting bone regeneration to enhance tendon-to-bone healing on the basis of surgical repair. Using in vitro experiments we studied the mechanism of lithium ions playing a two-way role, which was found to be closely related to the Wnt pathway. In vivo, the system showed significant success in the treatment of chronic rotator cuff injury model in rats. Both histological and micro-CT results confirmed that the healing condition of the Li+@MSNs/PEUU nanofibrous mat group was better than that of the other control groups after 8 weeks. Overall, this work shows that lithium-containing mesoporous silica-bound electrospun nanofibrous mat have a long-term effect on promoting postoperative healing of rotator cuff injury with fat infiltration, and the regulation of the two lineages is achieved using only a single medium, leading to good potential for application.
- Published
- 2020
19. Spherical vanadium phosphate particles grown on carbon fiber cloth as flexible anode for high-rate Li-ion batteries
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Xiu Song Zhao, Chao Wang, Xianfen Wang, and Chunfu Lin
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Range (particle radiation) ,Materials science ,General Chemical Engineering ,02 engineering and technology ,General Chemistry ,Bending ,010402 general chemistry ,021001 nanoscience & nanotechnology ,Electrochemistry ,01 natural sciences ,7. Clean energy ,Industrial and Manufacturing Engineering ,Energy storage ,Cathode ,0104 chemical sciences ,Anode ,law.invention ,Ion ,Chemical engineering ,law ,Electrode ,Environmental Chemistry ,0210 nano-technology - Abstract
Spherical vanadium phosphate (VPO4) particles grown on flexible electron-conductive carbon fiber cloth (CFC) is developed as a binder-free anode for lithium-ion batteries (LIBs). The flexible composite electrode (VP@CFC) exhibits an excellent performance, including high reversible lithium-ion storage capacity (541.2 mAh g−1 at 0.1C), high rate capability (350.2 mAh g−1 at 10C), and good cycling stability (a capacity retention ratio of 91.8% after 250 cycles at 1C). Moreover, a flexible full cell fabricated with the VP@CFC as anode and a commercial LiCoO2 (LCO) coated on CFC (LCO@CFC) as cathode displays good flexibility against mechanical bending at a wide range of angle while maintaining its good electrochemical performance. The flexible VP@CFC electrode holds a great promise in applications for flexible energy storage devices.
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- 2020
20. Interfacial polymerized and pore-variable covalent organic framework composite membrane for dye separation
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Hongyu Wu, Jixiao Wang, Wen Zhang, Muhammad Tahir, Song Zhao, Ting Wang, and Zhi Wang
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Materials science ,General Chemical Engineering ,02 engineering and technology ,General Chemistry ,010402 general chemistry ,021001 nanoscience & nanotechnology ,01 natural sciences ,Interfacial polymerization ,Industrial and Manufacturing Engineering ,0104 chemical sciences ,chemistry.chemical_compound ,Membrane ,Monomer ,chemistry ,Chemical engineering ,Polymerization ,Covalent bond ,Environmental Chemistry ,Thermal stability ,Polysulfone ,0210 nano-technology ,Covalent organic framework - Abstract
Covalent organic frameworks (COFs) with crystalline imide structure achieved remarkable application in the field of water treatment membrane. In this work, 1,3,5-triformylphloroglucinol (Tp) and benzidine (Bd) or melamine (Me) monomers as the assemble units were firstly in-situ interfacial polymerized upon polysulfone (PSf) porous substrate to form COFs composite membrane with a thin and stable COFs selective layer. Furthermore, adding melamine monomer during interfacial polymerization between Tp and Bd monomers could further introduce a triazine ring type-keto-enol tautomeric type into COFs selective layer, and adjust the molecular network structure and crystallinity of the COFs layer with variable pore aperture. The results indicated that the as-prepared TpBd/PSf and TpBdMe/PSf membranes could be efficiently applied for dye separation process with congo red rejection above 99.0%. Compared with TpBd/PSf membrane, water permeability of TpBdMe/PSf membrane increased from 33.6 L·m−2·h−1·bar−1 to 62.2 L·m−2·h−1·bar−1. Moreover, both TpBd/PSf and TpBdMe/PSf membranes exhibited excellent anti-fouling property, chemical and thermal stability. This work develops a facile method to prepare the imine-linked COFs membrane with variable pore aperture by changing reaction parameters and selecting appropriate amine monomers.
- Published
- 2020
21. MoOx nanoparticles anchored on N-doped porous carbon as Li-ion battery electrode
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Yusuke Yamauchi, Xiu Song Zhao, Xiuzheng Chen, Chao Wang, Xianfen Wang, Xuejun Xu, Chunfu Lin, Dong Luo, Xingyun Li, Jie Wang, Zhi Li, and Xixi Wang
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Materials science ,General Chemical Engineering ,Composite number ,Oxide ,chemistry.chemical_element ,Nanoparticle ,02 engineering and technology ,General Chemistry ,010402 general chemistry ,021001 nanoscience & nanotechnology ,01 natural sciences ,Industrial and Manufacturing Engineering ,0104 chemical sciences ,Anode ,chemistry.chemical_compound ,Chemical engineering ,chemistry ,Electrode ,Environmental Chemistry ,Lithium ,Graphite ,0210 nano-technology ,Carbon - Abstract
Transition-metal oxides based materials have recently been shown to be promising anode material for lithium ion batteries (LIBs) application to replace graphite material. In the present work, highly dispersed ultra-small MoOx nanoparticles anchored on N-doped three-dimensional (3D) hierarchically porous carbon (3D-MoOx@CN) are prepared on the basis of an efficient in-situ chelating and hard-templating strategy. The MoOx nanoparticles with particle sizes between 1.5 and 3.5 nm are observed to be anchored on the surface of the 3D N-doped carbon. The 3D-MoOx@CN composite anode electrode exhibits several appealing characteristics for lithium ion storage, including high specific capacity, good stability against cycling and fast charge transport kinetics. An optimized 3D-MoOx@CN sample (3D-MoOx@CN-700) delivers specific capacities of 742 mAh g−1 at current density of 100 mA g−1 and 431 mAh g−1 at 1000 mA g−1 after 1000 cycles, respectively. The observed excellent performance is due to the unique hierarchical pore structure with strong binding of the ultra-small MoOx nanoparticles onto N-doped carbon surface, which can avoid the agglomeration and alleviate the volume expansion of MoOx nanoparticles in the charge-discharge process. The composite electrode material described in this work holds a great potential for the development of high-performance lithium-ion batteries. Meanwhile, the synthesis method presents a common strategy to prepare other composite materials with highly dispersed metal oxide on the hierarchically porous carbon materials.
- Published
- 2020
22. Efficient removal of Cr (VI) by magnetic and recyclable calcined CoFe-LDH/g-C3N4 via the synergy of adsorption and photocatalysis under visible light
- Author
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Bin Ou, Song Zhao, Zhi Wang, Ying Wu, and Jixiao Wang
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Materials science ,Nanocomposite ,General Chemical Engineering ,02 engineering and technology ,General Chemistry ,010402 general chemistry ,021001 nanoscience & nanotechnology ,01 natural sciences ,Industrial and Manufacturing Engineering ,0104 chemical sciences ,Catalysis ,law.invention ,chemistry.chemical_compound ,Adsorption ,chemistry ,law ,Specific surface area ,Photocatalysis ,Environmental Chemistry ,Calcination ,Hexavalent chromium ,0210 nano-technology ,Visible spectrum ,Nuclear chemistry - Abstract
Magnetic and recyclable calcined CoFe-LDH/g-C3N4 catalyst was prepared by co-precipitation and calcination method, and used as a multifunctional material to remove hexavalent chromium (VI) via the synergistic effect of adsorption and photocatalysis. The calcined CoFe-LDH provide surface adsorption in the composite, which could lead to the adsorption of Cr (VI) with high adsorption capacity and fast speed. The g-C3N4 nanosheets have high photocatalytic activity in situ for the composite to reduce Cr (VI) into Cr (III). The results demonstrated that 60% Cr (VI) (50 mg L−1) can be adsorbed by the nanocomposite in 10 min and the removal efficiency of Cr (VI) reached 100% in 90 min under visible light irradiation by adsorption and photocatalysis. In addition, the calcined CoFe-LDH/g-C3N4 exhibits a mostly pore size about 2.58 nm, large specific surface area (101.61 m2 g−1) with the high structural stability and saturation magnetization (23.06 emu g−1), hence, could be easily recycled for ten subsequent runs with little activity loss.
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- 2020
23. Robust porous polymers bearing phosphine oxide/chalcogenide ligands for volatile iodine capture
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Peng Chen, Yingxin Mu, Chengde Huang, Xihong He, Song Zhao, Wen Zhang, Jing Chen, and Yuxin Wang
- Subjects
chemistry.chemical_classification ,Phosphine oxide ,Sulfide ,General Chemical Engineering ,Inorganic chemistry ,chemistry.chemical_element ,02 engineering and technology ,General Chemistry ,010402 general chemistry ,021001 nanoscience & nanotechnology ,Iodine ,01 natural sciences ,Industrial and Manufacturing Engineering ,Silsesquioxane ,0104 chemical sciences ,Chalcogen ,chemistry.chemical_compound ,Adsorption ,chemistry ,Selenide ,Environmental Chemistry ,0210 nano-technology ,Triphenylphosphine oxide - Abstract
Porous polymeric materials (PPMs) with phosphine oxide/chalcogenide (P = X) ligands were exploited, for the first time, for efficient capture of iodine from the vapor phase. Using triphenylphosphine oxide/sulfide/selenide (TPPO/S/Se), P = X ligands were introduced onto polyhedral oligomeric silsesquioxane (POSS) skeleton via a facile Friedel-Crafts reaction. They show iodine loading capacities, 1.22 g/g to 1.37 g/g at 90 °C, and 0.76 g/g to 0.85 g/g at 160 °C. Once heated at 160 °C under vacuum, they can still keep a considerable iodine loading capacity, 0.41 g/g and 0.51 g/g for POSS-TPPS and POSS-TPPSe, respectively. After soaking in ethanol, the POSS-TPPS/Se retained iodine more than 50%, the highest ratio reported so far for iodine release from PPMs. Besides, the dynamic column experiments were carried out to test their competitive adsorption performance of iodine from a mixed stream with water vapor (40% Relative humidity), and the results suggest that the elevated temperature (160 °C) can reduce the adverse effect of water adsorption remarkably. Moreover, the spectral evidence and DFT calculations reveal that a strong charge transfer through P = X to iodine originates from the three aromatic rings and the chalcogens. The adsorption energy for POSS-TPPSe complexing iodine can reach up to 66 kJ/mol I2, higher than other PPMs. As the first study of adsorbents with P = X ligands for iodine capture, this work opens a new avenue for the adsorptive capture of radioiodine in vapor at elevated temperatures and provides new insights for the interaction mechanism between P = X ligands and iodine molecules.
- Published
- 2020
24. Performance analysis of ultraviolet water disinfection reactors using computational fluid dynamics simulation
- Author
-
Xiu Song Zhao, Gade Pandu Rangaiah, and Chen Xu
- Subjects
Imagination ,Chemical substance ,business.industry ,Chemistry ,General Chemical Engineering ,media_common.quotation_subject ,Nuclear engineering ,Monte Carlo method ,Environmental engineering ,General Chemistry ,Computational fluid dynamics ,medicine.disease_cause ,Industrial and Manufacturing Engineering ,Fluent ,medicine ,Environmental Chemistry ,Water treatment ,business ,Science, technology and society ,Ultraviolet ,media_common - Abstract
Ultraviolet (UV) disinfection is an environmental-friendly technology for water treatment. However, design and operation of UV disinfection reactors is very difficult without a good model. In this work, motion trajectories of micro-organism particles in various UV water disinfection reactors with different shapes, sizes and lamp arrangements were simulated in the computational fluid dynamics (CFD) software: FLUENT, using the Monte-Carlo method and adopting a new methodology. The reactor performance based on micro-organism log reduction was analyzed under constant UV dosage. Effects of design and operating parameters on reactor performance were analyzed and discussed.
- Published
- 2013
25. Block copolymer-templated synthesis of highly organized mesoporous TiO2-based films and their photoelectrochemical applications
- Author
-
Jia Hong Pan, Xiu Song Zhao, and Wan In Lee
- Subjects
Materials science ,General Chemical Engineering ,Nanotechnology ,General Chemistry ,Industrial and Manufacturing Engineering ,Nanocrystalline material ,Dye-sensitized solar cell ,Mesoporous organosilica ,Electrochromism ,Copolymer ,Photocatalysis ,Environmental Chemistry ,Self-assembly ,Mesoporous material - Abstract
Over the last decade, mesoporous TiO2 nanocrystalline films have been intensively investigated not only for fundamental research interest but also for technological applications. This critical review summarizes recent progress of the block copolymer-templated highly organized mesoporous TiO2-based films prepared via an evaporation-induced self-assembly (EISA) process and their photoelectrochemical applications. With a brief introduction to the principle of block copolymer self-assembly and EISA process, control of the cooperative self-assembly between Ti species and block copolymer in the sol solution as well as in the deposited films, aging under a controlled humid environment, and subsequent thermal treatment is described. Key experimental parameters for the preparation of highly organized mesoporous TiO2 films are analyzed. Applications of mesoporous TiO2-based films in photocatalytic reactions, catalytic chemical synthesis, dye-sensitized solar cells, and electrochromic and photochromic devices are discussed. The synthesis-component-structure-property relationship in mesoporous TiO2-based films is highlighted, and the perspectives in this rapidly developing field are suggested.
- Published
- 2011
26. Manganese promoting effects on the Co–Ce–Zr–Ox nano catalysts for methane dry reforming with carbon dioxide to hydrogen and carbon monoxide
- Author
-
Ning Wang, Xiu Song Zhao, Wei Chu, and Tao Zhang
- Subjects
Carbon dioxide reforming ,Methane reformer ,Hydrogen ,Chemistry ,General Chemical Engineering ,Inorganic chemistry ,chemistry.chemical_element ,General Chemistry ,Oxygen ,Industrial and Manufacturing Engineering ,Methane ,Catalysis ,chemistry.chemical_compound ,Desorption ,Environmental Chemistry ,Carbon monoxide - Abstract
The Mn doping nanocrystalline Co–Ce–Zr–O x catalysts were prepared by the co-precipitation method and characterized by various physico-chemical characterization techniques such as X-ray diffraction (XRD), temperature- programmed reduction (TPR), O 2 temperature-programmed desorption (O 2 -TPD), X-ray photoelectron spectroscopy (XPS) and temperature-programmed hydrogenation (TPH). Their catalytic performances for methane reforming with CO 2 to hydrogen and carbon monoxide were investigated. Adding Mn remarkably enhanced the catalytic activity and stability of the Co–Ce–Zr–O x catalyst. The highest catalytic activity and long-term stability was obtained when the molar ratio of Mn/(Ce + Zr + Mn) was 10%. The improved catalytic behavior was closely related to the surface oxygen species and oxygen mobility. In comparison with that of Co–Ce–Zr–O x catalyst, the migration of bulk lattice oxygen species became easier, and the content of surface oxygen species was higher for the Mn-doped nanocrystalline Co–Ce–Zr–O x samples. TPH characterization showed that the surface coke species could be easily oxidized into CO x for the Mn-doped nano cobalt-composite catalyst due to the higher amount of mobile oxygen. The Mn incorporation promoted the dispersion of the nano-sized CoO x crystallites. In comparison with the impregnated samples, CoO x species dispersed better in the co-precipitated catalysts.
- Published
- 2011
27. Research on modular micro combustor-radiator with and without porous media
- Author
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Wei Yang, Xiu Song Zhao, Siaw Kiang Chou, Kian Jon Chua, and Jia Li
- Subjects
Materials science ,business.industry ,General Chemical Engineering ,Radiant energy ,Mechanical engineering ,General Chemistry ,Modular design ,Combustion ,Industrial and Manufacturing Engineering ,law.invention ,Electricity generation ,law ,Heat transfer ,Combustor ,Environmental Chemistry ,Composite material ,business ,Radiator ,Porous medium - Abstract
Micro combustor is one of the critical components of micro-thermophotovoltaic (TPV) system. To maximize the output power of the system, a high and uniform temperature distribution along the combustor wall is required. For the first time, SiC porous media foam is employed in a micro modular combustor to augment combustion, enhancing heat transfer between the hot gas and the wall, thereby increasing the wall temperature. The results indicate that with SiC porous media, the peak wall temperature increases by 90–120 K. This increase in wall temperature significantly enhances radiation energy which is useful for electricity generation.
- Published
- 2011
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