Amorphous Co3S4 nanoparticle-modified tubular g-C3N4 forms step-scheme heterojunctions for photocatalytic hydrogen production

2021 ◽  
Author(s):  
Yuanpeng Wang ◽  
Xuqiang Hao ◽  
Lijun Zhang ◽  
Zhiliang Jin ◽  
Tiansheng Zhao
Keyword(s):  
Hydrogen Production ◽  
Band Structure ◽  
Recombination Rate ◽  
Photogenerated Electron ◽  
Electron Hole ◽  
Photocatalytic Hydrogen Production

An effective method to reduce the recombination rate of photogenerated electron–hole pairs was developed by the construction of heterojunctions with rationally designed photocatalysts having a matched band structure.

Enabling photocatalytic hydrogen production over Fe-based MOFs by refining band structure with dye sensitization

2022 ◽  
Vol 429 ◽  
pp. 132217
Author(s):  
Shumin Li ◽  
Fan Wu ◽  
Rongbin Lin ◽  
Jin Wang ◽  
Chunxia Li ◽  
...  
Keyword(s):  
Hydrogen Production ◽  
Band Structure ◽  
Dye Sensitization ◽  
Photocatalytic Hydrogen Production

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.

Ni-MOF-74 derived nickel phosphide and In2O3 form S-scheme heterojunction for efficient hydrogen evolution

2021 ◽  
Author(s):  
Xudong Jiang ◽  
Mei Li ◽  
Hongying Li ◽  
Zhiliang Jin
Keyword(s):  
Hydrogen Production ◽  
Hydrogen Evolution ◽  
Production System ◽  
Nickel Phosphide ◽  
Electron Hole ◽  
Composite Photocatalyst ◽  
Photocatalytic Hydrogen Production

S-scheme heterojunction is a new photocatalytic hydrogen production system, which can effectively eliminate useless electron-hole pairs and improve the efficiency of photocatalytic hydrogen production. In this paper, Ni-MOF-P(Ni2P)/In2O3 composite photocatalyst...

Bimetallic phosphide NixCo1-xP decorated flower-like ZnIn2S4 for enhanced photocatalytic hydrogen evolution

2021 ◽  
Author(s):  
Yumeng Wang ◽  
Tingting Zhang ◽  
Tingting Wei ◽  
Fengyan Li ◽  
Lin Xu
Keyword(s):  
Low Temperature ◽  
Hydrogen Production ◽  
Hydrogen Evolution ◽  
Electron Hole ◽  
Photocatalytic Hydrogen Production ◽  
Factors Affecting ◽  
Photocatalytic Hydrogen Evolution ◽  
And Migration

Promoting electron-hole separation and migration is one of the important factors affecting the rate of photocatalytic hydrogen production. Herein, we firstly prepared the NixCo1-xP modified ZnIn2S4 (ZIS) nanoflowers by low-temperature...

NiS co-catalyst decorated Zn3In2S6/g-C3N4 type-II ball-flower like nanosphere heterojunction for efficient photocatalytic hydrogen production

2021 ◽  
Author(s):  
Xiang-yin Ji ◽  
Rui-tang Guo ◽  
Zhi-dong Lin ◽  
Long-fei Hong ◽  
Ye Yuan ◽  
...  
Keyword(s):  
Hydrogen Production ◽  
Charge Carrier ◽  
Hydrothermal Method ◽  
Type Ii ◽  
Electron Hole ◽  
Co Catalyst ◽  
Photocatalytic Hydrogen Production ◽  
Carrier Transfer

Promoting the separation of photo-generated electron-hole pairs and enhancing the charge carrier transfer are critical in photocatalysis. In our work, ball-flower like NiS/Zn3In2S6/g-C3N4 photocatalyst fabricated by hydrothermal method exhibited superior...

Hantzsch ester as hole relay significantly enhanced photocatalytic hydrogen production

2018 ◽  
Vol 8 (23) ◽  
pp. 6123-6128 ◽  
Author(s):  
Liu-Bo Ma ◽  
Ya-Nan Liu ◽  
Kuang Liang ◽  
Xiao-Xiang Fang ◽  
Shafaq Sahar ◽  
...  
Keyword(s):  
Hydrogen Production ◽  
Electron Hole ◽  
Photocatalytic Hydrogen Production

Hantzsch ester (DHPE) retards the recombination of electron–hole pairs through extracting holes from g-C3N4, thus dramatically improving visible photocatalytic hydrogen production.

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