20 results on '"Hu, Shu-Fen"'
Search Results
2. Recent Advances in Rechargeable Metal–CO2 Batteries with Nonaqueous Electrolytes.
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Sarkar, Ayan, Dharmaraj, Vasantan Rasupillai, Yi, Chia-Hui, Iputera, Kevin, Huang, Shang-Yang, Chung, Ren-Jei, Hu, Shu-Fen, and Liu, Ru-Shi
- Abstract
This review article discusses the recent advances in rechargeable metal–CO2 batteries (MCBs), which include the Li, Na, K, Mg, and Al-based rechargeable CO2 batteries, mainly with nonaqueous electrolytes. MCBs capture CO2 during discharge by the CO2 reduction reaction and release it during charging by the CO2 evolution reaction. MCBs are recognized as one of the most sophisticated artificial modes for CO2 fixation by electrical energy generation. However, extensive research and substantial developments are required before MCBs appear as reliable, sustainable, and safe energy storage systems. The rechargeable MCBs suffer from the hindrances like huge charging–discharging overpotential and poor cyclability due to the incomplete decomposition and piling of the insulating and chemically stable compounds, mainly carbonates. Efficient cathode catalysts and a suitable architectural design of the cathode catalysts are essential to address this issue. Besides, electrolytes also play a vital role in safety, ionic transportation, stable solid-electrolyte interphase formation, gas dissolution, leakage, corrosion, operational voltage window, etc. The highly electrochemically active metals like Li, Na, and K anodes severely suffer from parasitic reactions and dendrite formation. Recent research works on the aforementioned secondary MCBs have been categorically reviewed here, portraying the latest findings on the key aspects governing secondary MCB performances. [ABSTRACT FROM AUTHOR]
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- 2023
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3. A paraventricular hypothalamic nucleus input to ventral of lateral septal nucleus controls chronic visceral pain.
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Li, Yong-Chang, Wang, Qian, Li, Meng-Ge, Hu, Shu-Fen, and Xu, Guang-Yin
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VISCERAL pain , *PARAVENTRICULAR nucleus , *SEPTUM (Brain) , *CHRONIC pain , *IRRITABLE colon , *CENTRAL nervous system , *NEURAL pathways - Abstract
Supplemental Digital Content is Available in the Text. Paraventricular hypothalamic CaMKIIα-positive neurons input to ventral of lateral septal CaMKIIα-positive neurons controls chronic visceral pain. Irritable bowel syndrome is a functional gastrointestinal disorder characterized by chronic visceral pain with complex etiology and difficult treatment. Accumulated evidence has confirmed that the sensitization of the central nervous system plays an important role in the development of visceral pain, whereas the exact mechanisms of action of the neural pathways remain largely unknown. In this study, a distinct neural circuit was identified from the paraventricular hypothalamic (PVH) to the ventral of lateral septal (LSV) region. This circuit was responsible for regulating visceral pain. In particular, the data indicated that the PVH CaMKIIα-positive neurons inputs to the LSV CaMKIIα-positive neurons were only activated by colorectal distention rather than somatic stimulations. The PVH-LSV CaMKIIα+ projection pathway was further confirmed by experiments containing a viral tracer. Optogenetic inhibition of PVH CaMKIIα+ inputs to LSV CaMKIIα-positive neurons suppressed visceral pain, whereas selective activation of the PVH-LSV CaMKIIα+ projection evoked visceral pain. These findings suggest the critical role of the PVH-LSV CaMKIIα+ circuit in regulating visceral pain. [ABSTRACT FROM AUTHOR]
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- 2023
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4. H2O wash: a simple method toward eliminating discharge products and regenerating cathodes of Li–O2 batteries.
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Iputera, Kevin, Fu, Yu-Lin, Li, Lidong, Hu, Shu-Fen, Wei, Da-Hua, and Liu, Ru-Shi
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CATHODES , *ENERGY density , *STORAGE batteries , *ELECTRIC batteries , *LITHIUM-air batteries - Abstract
The development of air cathodes for Li–O2 batteries is extensively studied, but focus on recycling Li–O2 batteries is still limited. Usually, the final death of Li–O2 batteries is caused by the accumulation of discharge products (Li2O2) on air cathodes which cannot be decomposed. Herein, we report an H2O-wash method that could regenerate air cathodes and pretreat them for air-cathode characterization. We successfully regenerated two kinds of air cathodes for at least five rounds without capacity fading. The structural and chemical/electrochemical changes of air cathodes could be easily observed owing to the removal of discharge products. Volume expansion and functionalized carbon were observed after regeneration. Finally, the used air cathodes could be utilized for CO2 capture, thereby reducing the impact of CO2 emission. This study aims to show that Li–O2 batteries can not only serve as a device of high energy density but also as a solution to a greener future. [ABSTRACT FROM AUTHOR]
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- 2022
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5. Measurable Residual Disease Monitoring by Locked Nucleic Acid Quantitative Real-Time PCR Assay for IDH1/2 Mutation in Adult AML.
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Kao, Hsiao-Wen, Kuo, Ming-Chung, Huang, Ying-Jung, Chang, Hung, Hu, Shu-Fen, Huang, Chein-Fuang, Hung, Yu-Shin, Lin, Tung-Liang, Ou, Che-Wei, Lien, Ming-Yu, Wu, Jin-Hou, Chen, Chih-Cheng, and Shih, Lee-Yung
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STATISTICS , *GENETIC mutation , *CARCINOGENESIS , *MANN Whitney U Test , *FISHER exact test , *DESCRIPTIVE statistics , *CHI-squared test , *KAPLAN-Meier estimator , *POLYMERASE chain reaction , *BIOLOGICAL assay , *DATA analysis software , *DATA analysis , *NUCLEIC acids - Abstract
Simple Summary: Measurable residual disease (MRD) monitoring is crucial in managing AML to predict the risk of relapse. A better understanding of which MRD technique and molecular target will have an effective clinical impact on AML is still required. Locked nucleic acid quantitative Real-Time PCR assay (LNA-qPCR) is sensitive and specific for quantifying oncogenetic single-nucleotide variation. We assessed the role of LNA-qPCR in the monitoring of IDH1/2 mutations MRD in eighty-eight AML patients from multiple centers. We found that IDH1/2 LNA-qPCR MRD correlates well with NPM1 qPCR MRD, predicts relapse-free survival and cumulative incidence of relapse, and is a potential MRD technique for IDH1/2-mutated AML patients with reduced IDH1/2 mutant levels after complete remission. Locked nucleic acid quantitative Real-Time PCR (LNA-qPCR) for IDH1/2 mutations in AML measurable residual disease (MRD) detection is rarely reported. LNA-qPCR was applied to quantify IDH1/2 mutants MRD kinetics in bone marrow from 88 IDH1/2-mutated AML patients, and correlated with NPM1-MRD, clinical characteristics, and outcomes. The median normalized copy number (NCN) of IDH1/2 mutants decreased significantly from 53,228 (range 87–980,686)/ALB × 106 at diagnosis to 773 (range 1.5–103,600)/ALB × 106 at first complete remission (CR). IDH1/2 LNA-qPCR MRD was concordant with remission status or NPM1-MRD in 79.5% (70/88) of patients. Younger patients and patients with FLT3 mutations had higher concordance. The Spearman correlation coefficient (rs) and concordance rate between the log reduction of IDH1/2 LNA-qPCR and NPM1-MRD were 0.68 and 81% (K = 0.63, 95% CI 0.50–0.74), respectively. IDH1/2-MRD > 2 log reduction at first CR predicted significantly better relapse-free survival (3-year RFS rates 52.9% vs. 31.9%, p = 0.007) and cumulative incidence of relapse (3-year CIR rates 44.5% vs. 64.5%, p = 0.012) compared to IDH1/2-MRD ≤ 2 log reduction. IDH1/2-MRD > 2 log reduction during consolidation is also associated with a significantly lower CIR rate than IDH1/2-MRD ≤ 2 log reduction (3-year CIR rates 42.3% vs. 68.8%, p = 0.019). LNA-qPCR for IDH1/2 mutation is a potential MRD technique to predict relapse in IDH1/2-mutated AML patients, especially for those with IDH1/2 MRD > 2 log reduction at first CR or a concurrent FLT3 mutation. [ABSTRACT FROM AUTHOR]
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- 2022
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6. Halide‐type Li‐ion conductors: Future options for high‐voltage all‐solid‐state batteries.
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Huang, Jheng‐Yi, Iputera, Kevin, Jena, Anirudha, Tong, Zizheng, Wei, Da‐Hua, Hu, Shu‐Fen, and Liu, Ru‐Shi
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SOLID electrolytes , *LITHIUM-ion batteries , *STORAGE batteries - Abstract
The design of high‐energy‐density batteries is the future goal of research on Li‐ion batteries. Halide‐type solid‐state electrolytes (SSEs) exceed their counterparts in terms of their stability at high potential. In this minireview, we discuss the developments in the work on halide‐type SSEs for all‐solid‐state Li batteries. In particular, we focus on the Li3InCl6 structure. The effect of synthesis routes on this structure, as well as the convertible products resulting from its phase changes, is discussed. Conductivity can be increased and the electrochemical window can be improved through doping with different materials. Our review aims to provide readers with an overview of the stability and degradation of Li3InCl6 SSE and the structure of halide‐type SSEs (Li–M–X, where M is a metal and X is a halogen). [ABSTRACT FROM AUTHOR]
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- 2022
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7. Capturing carbon dioxide in Na–CO2 batteries: A route for green energy.
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Jena, Anirudha, Tong, Zizheng, Chang, Ho, Hu, Shu‐Fen, and Liu, Ru‐Shi
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RENEWABLE energy sources , *CARBON dioxide , *CARBONACEOUS aerosols , *STORAGE batteries , *CARBON emissions , *CHEMICAL decomposition , *NUCLEOSYNTHESIS - Abstract
Limiting the carbon emission to the atmosphere requires the efficient utilization of carbonaceous gases and their capture via well‐designed platforms. Metal–CO2 batteries are currently being demonstrated as the route to utilize CO2 and produce energy simultaneously. In particular, Na–CO2 batteries are considered an alternative to Li‐batteries because of their abundance and low cost. In the current review, the developments in the field of Na–CO2 batteries are discussed. Carbon dioxide reactions to the decomposition of discharge products have been discussed elaborately. The main discharge products of Na–CO2 batteries are Na2CO3 and C. In the current review, various strategies are discussed to decompose the discharge products and hence improve cycle stability. The fraction of CO2 has a substantial influence on cell cycles. A plausible route of battery reaction can be drawn with the help of an ex situ analysis of the electrodes. The final part of the review focuses on the use of solid‐state Na‐ion conductors in Na–CO2 batteries. [ABSTRACT FROM AUTHOR]
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- 2021
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8. Downregulation of GRK6 in arcuate nucleus promotes chronic visceral hypersensitivity via NF-κB upregulation in adult rats with neonatal maternal deprivation.
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Li, Xin, Xu, Yu-Cheng, Tian, Yuan-Qin, Zhang, Ping-An, Hu, Shu-Fen, Wang, Lin-Hui, Jiang, Xing-Hong, and Xu, Guang-Yin
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VISCERAL pain , *MATERNAL deprivation , *G protein coupled receptors , *CHRONIC pain , *RATS , *POLYMERASE chain reaction - Abstract
Aims: The arcuate nucleus is a vital brain region for coursing of pain command. G protein-coupled kinase 6 (GRK6) accommodates signaling through G protein-coupled receptors. Studies have demonstrated that GRK6 is involved in inflammatory pain and neuropathic pain. The present study was designed to explore the role and the underlying mechanism of GRK6 in arcuate nucleus of chronic visceral pain. Methods: Chronic visceral pain of rats was induced by neonatal maternal deprivation and evaluated by monitoring the threshold of colorectal distension. Western blotting, immunofluorescence, real-time quantitative polymerase chain reaction techniques, and Nissl staining were employed to determine the expression and mutual effect of GRK6 with nuclear factor κB (NF-κB). Results: Expression of GRK6 in arcuate nucleus was significantly reduced in neonatal maternal deprivation rats when compared with control rats. GRK6 was mainly expressed in arcuate nucleus neurons, but not in astrocytes, and a little in microglial cells. Neonatal maternal deprivation reduced the percentage of GRK6-positive neurons of arcuate nucleus. Overexpression of GRK6 by Lentiviral injection into arcuate nucleus reversed chronic visceral pain in neonatal maternal deprivation rats. Furthermore, the expression of NF-κB in arcuate nucleus was markedly upregulated in neonatal maternal deprivation rats. NF-κB selective inhibitor pyrrolidine dithiocarbamate suppressed chronic visceral pain in neonatal maternal deprivation rats. GRK6 and NF-κB were expressed in the arcuate nucleus neurons. Importantly, overexpression of GRK6 reversed NF-κB expression at the protein level. In contrast, injection of pyrrolidine dithiocarbamate once daily for seven consecutive days did not alter GRK6 expression in arcuate nucleus of neonatal maternal deprivation rats. Conclusions: Present data suggest that GRK6 might be a pivotal molecule participated in the central mechanisms of chronic visceral pain, which might be mediated by inhibiting NF-κB signal pathway. Overexpression of GRK6 possibly represents a potential strategy for therapy of chronic visceral pain. [ABSTRACT FROM AUTHOR]
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- 2020
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9. Pressure-controlled chemical vapor deposition of graphene as catalyst for solar hydrogen evolution reaction.
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Han, Chih-Pin, Chen, Chih-Jung, Hsu, Chen-Chih, Jena, Anirudha, Chang, Ho, Yeh, Nai-Chang, Hu, Shu-Fen, and Liu, Ru-Shi
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PHOTOCATHODES , *HYDROGEN evolution reactions , *CHEMICAL vapor deposition , *GRAPHENE synthesis , *SILICON polymers , *HYDROGEN as fuel - Abstract
• Photocatalyst Water splitting as clear energy for hydrogen evolution reaction. • Silicon earth-abound material as substrate photoabsorber absorbs wide range solar light. • Carbon material low cost, high chemical stability for water splitting. • Graphene synthesis by different methods, next though to transferred to silicon by polymer substrate as a catalyst layer. In the present report, graphene-based catalysts on silicon substrate have been examined as the photocathode for solar hydrogen evolution reaction (HER). Mono-layered graphene has been synthesized through low-pressure chemical vapor deposition (LPCVD), whereas multi-layered graphene has been synthesized by atmospheric pressure chemical vapor deposition (APCVD). Copper foil is used as the substrate. The graphene layer on Cu foil subsequently transferred on to silicon photoabsorber using poly(methyl-2-methylpropenoate) (PMMA). At the initial linear sweep voltammetry (LSV) scan, LPCVD-synthesized graphene-Si (LPCVD-Si) electrode showed an onset potential of −0.65 V and photocurrent of −4.31 mA cm−2 (at −0.385 V). On the contrary, the onset potential and photocurrent of APCVD-prepared graphene-Si (APCVD-Si) photocathode are −0.36 V and −28.28 mA cm−2 (at −0.385 V), respectively. After the 130th LSV scan, the onset potential and photocurrent of LPCVD-Si improved to −0.39 V and −13.28 mA cm−2 (at −0.385 V), respectively. In addition, the onset potential and photocurrent of APCVD-Si photocathode at the LSV 130th scan are enhanced to −0.36 V and −28.28 mA cm−2 (at −0.385 V), respectively. The graphene sample grown via LPCVD-Si show stable performance whereas, the graphene obtained via APCVD-Si have higher photocurrent poor stability. [ABSTRACT FROM AUTHOR]
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- 2019
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10. Quantum dots for light conversion, therapeutic and energy storage applications.
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Veeramani, Vediyappan, Bao, Zhen, Chan, Ming-Hsien, Wang, Hung-Chia, Jena, Anirudha, Chang, Ho, Hu, Shu-Fen, and Liu, Ru-Shi
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PHOTONS , *ENERGY storage , *LITHIUM-air batteries , *LIGHT , *CADMIUM selenide , *QUANTUM dots - Abstract
Abstract In this review paper, we highlight the utilization of nanostructured quantum dots (QDs) in light-emitting diodes, biomedical, and energy-related applications. We discuss different preparation methods, cation-doping effects, and the optical applications of perovskite QDs. Cadmium selenide QDs are semiconductor materials with narrow bandgaps; therefore, their optical properties and electronic structures can be tuned. They can absorb photons (light energy) and convert multiple electron-hole pairs efficiently via multiple exciton generations. These effective light absorption properties are suitable for solar-driven water electrolysis processes and efficient photo-electrochemical lithium-air batteries. We focus on the utilization of upconverting nanoparticles in the field of biomedical applications. Suitable bandgap position, efficient charge separation, transportation, and photo-stability are the advantages of QD nanostructured materials. Hence, they are efficient and challenging candidates for the future. Graphical abstract In this review, we summarize the utilization of nanostructured quantum dots (QDs) in light-emitting diodes, biomedical, and energy-related applications. We discuss different preparation methods, cation-doping effects, and the optical applications of perovskite QDs which have excellent optical performance in the application of the light-emitting device. Besides, Cadmium selenide QDs can absorb photons (light energy) and convert multiple electron-hole pairs efficiently via multiple exciton generations. These effective light absorption properties are suitable for solar-driven water electrolysis processes and efficient photo-electrochemical lithium-air batteries. Moreover, upconverting nanoparticles have the unique performance in the field of biomedical applications. fx1 [ABSTRACT FROM AUTHOR]
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- 2019
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11. CdSe/ZnS QD@CNT nanocomposite photocathode for improvement on charge overpotential in photoelectrochemical Li-O2 batteries.
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Veeramani, Vediyappan, Chen, Yu-Hsiang, Wang, Hung-Chia, Hung, Tai-Feng, Chang, Wen-Sheng, Wei, Da-Hua, Hu, Shu-Fen, and Liu, Ru-Shi
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LITHIUM-ion batteries , *CADMIUM selenide , *ZINC selenide , *QUANTUM dots , *CARBON nanotubes , *OVERPOTENTIAL , *PHOTOELECTROCHEMISTRY - Abstract
Li-ion batteries play a significant role in portable electronic devices in the running world. However, the limited energy density still needs to be improved for the growing future. Hence, we developed a photocathode nanocomposite material composed of Cadmium Selenide/Zinc Sulfide Quantum Dots with Carbon nanotube (CdSe/ZnS QD@CNT) for an efficient and tunable performance of the photoelectrochemical Li–O 2 battery system to overcome the key issue of overpotential. The QD and CNT networks can provide efficient transportation paths of the electron–hole pairs and the O 2 gas and lithium ions, respectively. The charging voltage of the photoelectrode is 2.65–4.0 V; therefore, decreased overpotential was due to efficient oxidation of Li 2 O 2 by photoexcited electron–hole pairs by using QDs, resulting in a long-term operational stability over 100 cycles. On the basis of the advantages, the QDs exhibit efficient potential in Li–O 2 batteries. [ABSTRACT FROM AUTHOR]
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- 2018
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12. Na@C composite anode for a stable Na|NZSP interface in solid-state Na–CO2 battery.
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Tong, Zizheng, Wang, Shu-Bo, Wang, Yan-Cheng, Yi, Chia-Hui, Wu, Ching-Chen, Chang, Wen-Sheng, Tsai, Kun-Ta, Tsai, Sung-Yu, Hu, Shu-Fen, and Liu, Ru-Shi
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SOLID state batteries , *INTERFACIAL reactions , *INTERFACIAL resistance , *SOLID electrolytes , *ENERGY storage , *CARBON-black , *ANODES - Abstract
Na–CO 2 battery is one of the most promising energy storage devices for the exploration of Mar. To fix the evaporation problem of liquid electrolytes in an open system, solid-state electrolyte Na 3 Zr 2 Si 2 PO 12 (NZSP) is used to fabricate a solid-state Na–CO 2 battery. In the battery, the interface between the Na-metal anode and NZSP plays a vital role in improving electrochemical performance. The interfacial parasitic reaction between NZSP and Na-metal results in a Na-rich kinetically stable interphase. (200) and (−111) planes are the preferentially etched crystal planes of NZSP, as SiO 4 and PO 4 tetrahedrons on the planes are easily broken by extra Na-ion injection. Aside from the interfacial reaction, the poor contact between Na-metal and NZSP is a more serious problem, which leads to large interfacial resistance and poor cycling stability. To fix this problem, carbon black is mixed with melted Na-metal to prepare a composite anode (Na@C). The Na@C composite anode easily wets NZSP, thus decreasing the interfacial resistance from 918 to 98 Ω cm2. Symmetrical cells stably cycled 1100 h at 0.1 mA cm−2, when using Na@C as the electrode. Furthermore, Na–CO 2 battery with Na@C composite anode also shows a prolonged cycling life. [Display omitted] ● (200) and (−111) planes are found as preferentially etched crystal planes of NZSP. ● Kinetically stable interphase between Na and NZSP has been found. ● Poor interfacial contact between Na and NZSP results in poor cycling stability. ● Na@C composite anode makes intimate contact with NZSP. ● The solid-state Na–CO 2 battery shows better performance by using Na@C. [ABSTRACT FROM AUTHOR]
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- 2022
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13. High specific capacity retention of graphene/silicon nanosized sandwich structure fabricated by continuous electron beam evaporation as anode for lithium-ion batteries.
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Mori, Tatsuhiro, Chen, Chih-Jung, Hung, Tai-Feng, Mohamed, Saad Gomaa, Lin, Yi-Qiao, Lin, Hong-Zheng, Sung, James C., Hu, Shu-Fen, and Liu, Ru-Shi
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ELECTRIC properties of graphene , *ELECTRIC properties of silicon , *ELECTROCHEMICAL electrodes , *LITHIUM-ion batteries , *LIGHT emitting diodes , *ELECTRON beams , *RAMAN effect - Abstract
A graphene/silicon (Si) multilayer sandwich structures are fabricated using electron beam (EB) deposition without air exposure. The graphene and Si thin films are formed on Cu current correctors through a continuous process in high-vacuum EB chamber. Synthesized graphene should be suggested to the stacked multiple layer from Raman analysis. The fabricated multilayer films are used as anodes. In the beginning, the half-cell, which used a seven-layer of each thickness 50-nm graphene and Si film, exhibits good specific capacity retention over 1000 mA h g −1 after 30 charge/discharge cycles. The capacity value changed with the number of graphene and Si layers. In this study, the number of layers that exhibited optimal properties is seven. Morphological investigation showed a fine layer-by-layer structure. The relationship between different thicknesses of graphene and Si is investigated at 7 L. A 100-nm thickness exhibited optimal properties. Finally, the optimal 7 L and 100-nm thick graphene/Si exhibited high discharge capacitance >1600 mA h g −1 at a current density of 100 mA g −1 after 30 cycles. Initial coulombic and reversible efficiencies exceed 84%. The capacity retention (30th/1st discharge value) at 100 nm and 7 L exceeds 90%. Finally, the soft package battery is assembled by combining the fabricated graphene and Si electrode as anode, LiCoO 2 as cathode, separator and liquid electrolyte. It can be used for commercial light-emitting diode (LED) lighting even under bending status. [ABSTRACT FROM AUTHOR]
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- 2015
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14. Heterostructure of Si and CoSe2: A Promising Photocathode Based on a Non-noble Metal Catalyst for Photoelectrochemical Hydrogen Evolution.
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Basu, Mrinmoyee, Chen, Chih-Jung, Lin, Chun Che, Liu, Ru-Shi, Zhang, Zhi-Wei, Chen, Po-Tzu, Yang, Kai-Chih, Hu, Shu-Fen, and Ma, Chong-Geng
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HETEROSTRUCTURES , *SELENIDES , *SILICON , *PHOTOCATHODES , *HYDROGEN evolution reactions , *METAL catalysts , *PHOTOELECTROCHEMICAL cells - Abstract
Development of a solar water splitting device requires design of a low-cost, efficient, and non-noble metal compound as alternative to noble metals. For the first time, we showed that CoSe2 can function as co-catalyst in phototoelectrochemical hydrogen production. We designed a heterostructure of p-Si and marcasite-type CoSe2 for solar-driven hydrogen production. CoSe2 successively coupled with p-Si can act as a superior photocathode in the solar-driven water splitting reaction. Photocurrents up to 9 mA cm−2 were achieved at 0 V vs. reversible hydrogen electrode. Electrochemical impedance spectroscopy showed that the high photocurrents can be attributed to low charge transfer resistance between the Si and CoSe2 interfaces and that between the CoSe2 and electrolyte interfaces. Our results suggest that this CoSe2 is a promising alternative co-catalyst for hydrogen evolution. [ABSTRACT FROM AUTHOR]
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- 2015
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15. Heterostructure of Si and CoSe2: A Promising Photocathode Based on a Non-noble Metal Catalyst for Photoelectrochemical Hydrogen Evolution.
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Basu, Mrinmoyee, Zhang, Zhi-Wei, Chen, Chih-Jung, Chen, Po-Tzu, Yang, Kai-Chih, Ma, Chong-Geng, Lin, Chun Che, Hu, Shu-Fen, and Liu, Ru-Shi
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HETEROSTRUCTURES , *METAL catalysts , *HYDROGEN evolution reactions , *SOLAR water heaters , *PHOTOELECTROCHEMISTRY - Abstract
Development of a solar water splitting device requires design of a low-cost, efficient, and non-noble metal compound as alternative to noble metals. For the first time, we showed that CoSe2 can function as co-catalyst in phototoelectrochemical hydrogen production. We designed a heterostructure of p-Si and marcasite-type CoSe2 for solar-driven hydrogen production. CoSe2 successively coupled with p-Si can act as a superior photocathode in the solar-driven water splitting reaction. Photocurrents up to 9 mA cm−2 were achieved at 0 V vs. reversible hydrogen electrode. Electrochemical impedance spectroscopy showed that the high photocurrents can be attributed to low charge transfer resistance between the Si and CoSe2 interfaces and that between the CoSe2 and electrolyte interfaces. Our results suggest that this CoSe2 is a promising alternative co-catalyst for hydrogen evolution. [ABSTRACT FROM AUTHOR]
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- 2015
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16. Phosphorous-doped molybdenum disulfide anchored on silicon as an efficient catalyst for photoelectrochemical hydrogen generation.
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Chen, Chih-Jung, Veeramani, Vediyappan, Wu, Yi-Hsiu, Jena, Anirudha, Yin, Li-Chang, Chang, Ho, Hu, Shu-Fen, and Liu, Ru-Shi
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MOLYBDENUM sulfides , *INTERSTITIAL hydrogen generation , *EXTENDED X-ray absorption fine structure , *MOLYBDENUM disulfide , *ATOMIC layer deposition , *HYDROGEN evolution reactions - Abstract
• P-doped MoS 2 was integrated on Si pyramids as photocathode for hydrogen evolution. • The Efficiency was enhanced by exposing edges and activating basal planes of MoS 2. • MoS 1.75 P 0.25 /Si pyramids showed the optimal current density of −23.8 mA cm−2. • MoS 1.75 P 0.25 /2 nm TiO 2 /Si electrode presented the current retention of 84.0%. Herein, molybdenum disulfide (MoS 2) integrated on Si pyramids was used as a co-catalyst to improve charge separation efficiency. Various quantities of phosphorus (P) heteroatoms were doped into MoS 2 materials to boost catalytic performance. Raman and extended X-ray absorption fine structure spectra showed that the introduction of P dopants increased the number of exposed edges and sulfur vacancies that acted as hydrogen evolution reaction (HER) active sites on MoS 2 and enhanced photoelectrochemical activity. Density functional theory calculations revealed that the HER inert basal plane of MoS 2 became catalytically active after P atoms doping. MoS 1.75 P 0.25 /Si pyramids presented the optimal onset potential of +0.29 V (vs. RHE) and current density −23.8 mA cm−2. A titanium dioxide (TiO 2) layer was prepared through atomic layer deposition and served as a passivation layer that improved photocathode stability. The photocurrent retention of MoS 1.75 P 0.25 /10 nm TiO 2 /Si pyramids was 84.0% after 2 h of chronoamperometric measurement. [ABSTRACT FROM AUTHOR]
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- 2020
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17. Near-infrared phosphors and their full potential: A review on practical applications and future perspectives.
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De Guzman, Gabriel Nicolo A., Fang, Mu-Huai, Liang, Chia-Hsuan, Bao, Zhen, Hu, Shu-Fen, and Liu, Ru-Shi
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PHOSPHORS , *DIODES , *SPECTRUM analysis , *PLATEAUS , *CRYSTALS - Abstract
Near-infrared (NIR) phosphors are enticing photoluminescent materials with applications in light-emitting diodes for spectroscopy. These phosphors have two types of emissions: Type I has a Gaussian curve, whereas Type II is similar to a plateau. Both emissions have industrial uses, but uncertain remains regarding which type is ideal. In this review, we compare two distinct NIR phosphors with Type I and Type II emissions in terms of their structure, crystal field, and emission profile and then provide our perspective on what the ideal emission must be. Image 1 • Near-infrared phosphors as main components for light-emitting diode devices. • Type-I near-infrared emission has a Gaussian curve with high luminescent intensity. • Type-II near-infrared emission has a plateau shape with superior broadband coverage. • Strategy in order to achieve the ideal emission for near-infrared light-emitting diodes. [ABSTRACT FROM AUTHOR]
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- 2020
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18. ChemInform Abstract: Heterostructure of Si and CoSe2: A Promising Photocathode Based on a Non-noble Metal Catalyst for Photoelectrochemical Hydrogen Evolution.
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Basu, Mrinmoyee, Zhang, Zhi‐Wei, Chen, Chih‐Jung, Chen, Po‐Tzu, Yang, Kai‐Chih, Ma, Chong‐Geng, Lin, Chun Che, Hu, Shu‐Fen, and Liu, Ru‐Shi
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HETEROSTRUCTURES , *PHOTOCATHODES , *METAL catalysts - Abstract
Semiconductive marcasite-type CoSe2 nanorods are prepared by hydrothermal reaction of CoCl2 and Se in aq. [ABSTRACT FROM AUTHOR]
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- 2015
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19. Inside Back Cover: Heterostructure of Si and CoSe2: A Promising Photocathode Based on a Non-noble Metal Catalyst for Photoelectrochemical Hydrogen Evolution (Angew. Chem. Int. Ed. 21/2015).
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Basu, Mrinmoyee, Chen, Chih-Jung, Lin, Chun Che, Liu, Ru-Shi, Zhang, Zhi-Wei, Chen, Po-Tzu, Yang, Kai-Chih, Hu, Shu-Fen, and Ma, Chong-Geng
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HETEROSTRUCTURES - Published
- 2015
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20. Innenrücktitelbild: Heterostructure of Si and CoSe2: A Promising Photocathode Based on a Non-noble Metal Catalyst for Photoelectrochemical Hydrogen Evolution (Angew. Chem. 21/2015).
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Basu, Mrinmoyee, Zhang, Zhi-Wei, Chen, Chih-Jung, Chen, Po-Tzu, Yang, Kai-Chih, Ma, Chong-Geng, Lin, Chun Che, Hu, Shu-Fen, and Liu, Ru-Shi
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- 2015
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