MoSx supported hematite with enhanced photoelectrochemical performance

2015 ◽  
Vol 3 (43) ◽  
pp. 21444-21450 ◽  
Author(s):  
Hyo-Jin Ahn ◽  
Ki-Yong Yoon ◽  
Myung-Jun Kwak ◽  
Jung-Soo Lee ◽  
Pradheep Thiyagarajan ◽  
...  
Keyword(s):  
Molybdenum Sulfide ◽  
Photoelectrochemical Performance ◽  
Electron Hole ◽  
Hole Transfer ◽  
Transfer Problems

By creating a p–n heterojunction of molybdenum sulfide (MoSx)/Ti-doped Fe2O3 (Ti-Fe2O3), we successfully addressed electron–hole transfer problems of hematite and thus achieved the enhanced photoelectrochemical (PEC) performance.

Fabrication of a ternary CdS/ZnIn2S4/TiO2 heterojunction for enhancing photoelectrochemical performance: effect of cascading electron–hole transfer

2015 ◽  
Vol 3 (46) ◽  
pp. 23597-23606 ◽  
Author(s):  
Mahadeo A. Mahadik ◽  
Pravin S. Shinde ◽  
Min Cho ◽  
Jum Suk Jang
Keyword(s):  
Hydrothermal Method ◽  
Three Dimensional ◽  
Photoelectrochemical Performance ◽  
Electron Hole ◽  
Facile Hydrothermal Method ◽  
Hole Transfer ◽  
Performance Effect

A novel, three-dimensional, ternary CdS/ZnIn2S4/TiO2 heterojunction has been fabricated via a three-step facile hydrothermal method.

Environmental Fluctuations Facilitate Electron-Hole Transfer from Guanine to Adenine in DNAπ Stacks

2004 ◽  
Vol 43 (5) ◽  
pp. 624-627 ◽  
Author(s):  
Alexander A. Voityuk ◽  
Khatcharin Siriwong ◽  
Notker Rösch
Keyword(s):  
Electron Hole ◽  
Hole Transfer ◽  
Environmental Fluctuations

Environmental Fluctuations Facilitate Electron-Hole Transfer from Guanine to Adenine in DNAπ Stacks

2004 ◽  
Vol 116 (5) ◽  
pp. 634-637 ◽  
Author(s):  
Alexander A. Voityuk ◽  
Khatcharin Siriwong ◽  
Notker Rösch
Keyword(s):  
Electron Hole ◽  
Hole Transfer ◽  
Environmental Fluctuations

Electron-Hole Transfer in G-Quadruplexes with Different Tetrad Stacking Geometries: A Combined QM and MD Study

2013 ◽  
Vol 117 (34) ◽  
pp. 9851-9856 ◽  
Author(s):  
Christopher J. Lech ◽  
Anh Tuân Phan ◽  
Maria-Elisabeth Michel-Beyerle ◽  
Alexander A. Voityuk
Keyword(s):  
Electron Hole ◽  
Hole Transfer

scholarly journals Mechanical Energy-to-Electricity Conversion of Electron/Hole-Transfer Agent-Doped Poly(Vinylidene Fluoride) Nanofiber Webs

2017 ◽  
Vol 302 (8) ◽  
pp. 1600451 ◽  
Author(s):  
Hao Shao ◽  
Jian Fang ◽  
Hongxia Wang ◽  
Chenhong Lang ◽  
Guilong Yan ◽  
...  
Keyword(s):  
Vinylidene Fluoride ◽  
Mechanical Energy ◽  
Electron Hole ◽  
Hole Transfer ◽  
Poly Vinylidene Fluoride

Collision induced charge separation in ground-state water splitting dynamics

2018 ◽  
Vol 20 (17) ◽  
pp. 12229-12240 ◽  
Author(s):  
Kentaro Yamamoto ◽  
Kazuo Takatsuka
Keyword(s):  
Water Splitting ◽  
Ground State ◽  
Charge Separation ◽  
Electron Hole ◽  
Hole Transfer ◽  
State Water ◽  
Induced Charge ◽  
State Charge

The pathway of one-way electron–hole transfer induced by proton reciprocating motions, thereby realizing the collision induced ground-state charge separation.

scholarly journals Enhanced photoelectrochemical performance of NiO-doped TiO2 nanotubes prepared by an impregnation–calcination method

2021 ◽  
pp. 174751982110562
Author(s):  
Xueqin Wang ◽  
Man Dai ◽  
Qihui Chen ◽  
Kai Cheng ◽  
Helong Xu ◽  
...  
Keyword(s):  
Recombination Rate ◽  
Photogenerated Electron ◽  
Photoelectrochemical Performance ◽  
Electron Hole ◽  
Lifetime Measurements ◽  
X Ray ◽  
Self Organized ◽  
Anodization Process ◽  
Calcination Method ◽  
Microscopy Images

To improve the photocatalytic activity of TiO2, a series of NiO–TiO2 nanotubes (NTbs) is prepared by impregnating TiO2 nanotubes in a solution of NiCl2·6H2O at different concentrations. Self-organized TiO2 nanotubes are prepared by a two-step anodization process. Scanning electron microscopy images show that large particle agglomerates are formed for higher precursor concentrations, and X-ray energy-dispersive spectroscopy results indicate that the atomic percentages of Ni in the NiO–TiO2 NTbs prepared with precursor concentrations of 100 and 300 mM are 1.95% and 4.23%, respectively. Electronic lifetime measurements show that the recombination rate of photogenerated electron–hole pairs is lower for NiO–TiO2 NTbs compared to that of TiO2. Specifically, the recombination rate of the sample prepared at 50 mM is the lowest, which is associated with the longest electron lifetime. Compared to unmodified TiO2 nanotubes, NiO–TiO2 NTbs exhibit improved results for the photocatalytic degradation of rhodamine B.

scholarly journals Synthesis and Characterization of Amorphous Molybdenum Sulfide (MoSx)/CdIn2S4 Composite Photocatalyst: Co-Catalyst Using in the Hydrogen Evolution Reaction

Catalysts ◽  
2020 ◽  
Vol 10 (12) ◽  
pp. 1455
Author(s):  
Qi Li ◽  
Wanli Liu ◽  
Xuejian Xie ◽  
Xianglong Yang ◽  
Xiufang Chen ◽  
...  
Keyword(s):  
Hydrogen Production ◽  
Separation Efficiency ◽  
Photogenerated Electron ◽  
Molybdenum Sulfide ◽  
Electron Hole ◽  
Composite Photocatalyst ◽  
Co Catalyst ◽  
Pair Separation ◽  
Electron Hole Pair

Co-catalyst deposition is used to improve the surface and electrical properties of photocatalysts. In this work, MoSx/CdIn2S4 nanocomposites were prepared by a facile hydrothermal and photodeposition route. The basic crystalline phases and morphology of the as-prepared samples were determined, and these results showed that MoSx was tightly anchored onto CdIn2S4 by sharing the same S atom. In the hydrogen production experiments, MoSx/CdIn2S4-40 displayed the optimal photocatalytic hydrogen production yield in 4 h. The H2 evolution rate reached 2846.73 μmol/g/h, which was 13.6-times higher than that of pure CdIn2S4. Analyzing the photocatalytic enhancement mechanisms revealed that this unique structure had a remarkable photogenerated electron-hole pair separation efficiency, rapid charge carrier transfer channels, and more abundant surface reaction sites. The use of co-catalyst (MoSx) greatly improved the photocatalytic activity of CdIn2S4.

scholarly journals Radiative and Non-Radiative Recombination Pathways in Mixed-Phase TiO2 Nanotubes for PEC Water-Splitting

Catalysts ◽  
2019 ◽  
Vol 9 (2) ◽  
pp. 204 ◽  
Author(s):  
Rambabu Yalavarthi ◽  
Alberto Naldoni ◽  
Štěpán Kment ◽  
Luca Mascaretti ◽  
Hana Kmentová ◽  
...  
Keyword(s):  
Water Splitting ◽  
Water Oxidation ◽  
Transfer Rate ◽  
Electrochemical Impedance ◽  
Mixed Phase ◽  
Transfer Efficiency ◽  
Electron Hole ◽  
Surface Trap ◽  
Hole Transfer ◽  
Recombination Processes

Anatase and rutile mixed-phase TiO2 with an ideal ratio has been proven to significantly enhance photoelectrochemical (PEC) activity in water-splitting applications due to suppressing the electron–hole recombination. However, the mechanism of this improvement has not been satisfactory described yet. The PEC water oxidation (oxygen evolution) at the interface of TiO2 photoanode and electrolyte solution is determined by the fraction of the photogenerated holes that reach the solution and it is defined as the hole transfer efficiency. The surface and bulk recombination processes in semiconductor photoanodes majorly influence the hole transfer efficiency. In this work, we study the hole transfer process involved in mixed-phase TiO2 nanotube arrays/solution junction using intensity-modulated photocurrent and photovoltage spectroscopy (IMPS and IMVS); then, we correlate the obtained hole transfer rate constants to (photo)electrochemical impedance spectroscopy (PEIS) measurements. The results suggest that the enhanced performance of the TiO2 mixed-phase is due to the improved hole transfer rate across the TiO2/liquid interface as well as to the decrease in the surface trap recombination of the holes.

Probing single-molecule electron–hole transfer dynamics at a molecule–NiO semiconductor nanocrystalline interface

2017 ◽  
Vol 19 (26) ◽  
pp. 17216-17223 ◽  
Author(s):  
Bharat Dhital ◽  
Vishal Govind Rao ◽  
H. Peter Lu
Keyword(s):  
Single Molecule ◽  
Fluorescence Intensity ◽  
Intensity Fluctuation ◽  
Hole Injection ◽  
Single Molecule Fluorescence ◽  
Electron Hole ◽  
Hole Transfer ◽  
Recombination Mechanism

We probe electron–hole injection as well as a recombination mechanism and dynamics at a dye–NiO interface based on single-molecule fluorescence intensity fluctuation and blinking measurements.

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