scholarly journals g-C3N4 Sensitized by an Indoline Dye for Photocatalytic H2 Evolution

Processes ◽  
2021 ◽  
Vol 9 (6) ◽  
pp. 1055
Author(s):  
Yihang Chen ◽  
Yanfei Liu ◽  
Zhen Ma
Keyword(s):  
Electron Transfer ◽  
Visible Light ◽  
Water Splitting ◽  
H2 Production ◽  
Charge Carriers ◽  
H2 Evolution ◽  
Co Catalyst ◽  
Efficient Separation ◽  
Photocatalytic H2 Evolution ◽  
Hcl Solution

Protonated g-C3N4 (pCN) formed by treating bulk g-C3N4 with an aqueous HCl solution was modified with D149 dye, i.e., 5-[[4[4-(2,2-diphenylethenyl) phenyl]-1,2,3,3a,4,8b-hexahydrocyclopent[b]indol-7-yl] methylene]-2-(3-ethyl-4-oxo-2-thioxo-5-thiazolidinylidene)-4-oxo-thiazolidin-2-ylidenerhodanine, for photocatalytic water splitting (using Pt as a co-catalyst). The D149/pCN-Pt composite showed a much higher rate (2138.2 µmol·h−1·g−1) of H2 production than pCN-Pt (657.0 µmol·h−1·g−1). Through relevant characterization, the significantly high activity of D149/pCN-Pt was linked to improved absorption of visible light, accelerated electron transfer, and more efficient separation of charge carriers. The presence of both D149 and Pt was found to be important for these factors. A mechanism was proposed.

Boosting photocatalytic H2 evolution on g-C3N4 by modifying covalent organic frameworks (COFs)

2019 ◽  
Vol 55 (41) ◽  
pp. 5829-5832 ◽  
Author(s):  
Maolan Luo ◽  
Qing Yang ◽  
Kewei Liu ◽  
Hongmei Cao ◽  
Hongjian Yan
Keyword(s):  
Visible Light ◽  
Hydrogen Evolution ◽  
Quantum Efficiency ◽  
Covalent Organic Frameworks ◽  
H2 Evolution ◽  
Co Catalyst ◽  
Visible Light Driven ◽  
Apparent Quantum Efficiency ◽  
Sacrificial Agent ◽  
Photocatalytic H2 Evolution

Modifying g-C3N4 with covalent organic frameworks (COFs) through imine linkage results in a dramatically enhanced visible-light-driven photocatalytic hydrogen evolution, which reached 10.1 mmol g−1 h−1 when 2 wt% Pt and triethanolamine were used as co-catalyst and sacrificial agent, respectively, corresponding to an apparent quantum efficiency (AQE) of 20.7% at 425 nm.

scholarly journals Photocatalytic H2 Evolution on TiO2 Assembled with Ti3C2 MXene and Metallic 1T-WS2 as Co-catalysts

2019 ◽  
Vol 12 (1) ◽  
Author(s):  
Yujie Li ◽  
Lei Ding ◽  
Shujun Yin ◽  
Zhangqian Liang ◽  
Yanjun Xue ◽  
...  
Keyword(s):  
Electron Transfer ◽  
Surface Area ◽  
Active Site ◽  
Tungsten Disulfide ◽  
Transfer Efficiency ◽  
H2 Evolution ◽  
Co Catalysts ◽  
Efficient Separation ◽  
Photocatalytic H2 Evolution

AbstractThe biggest challenging issue in photocatalysis is efficient separation of the photoinduced carriers and the aggregation of photoexcited electrons on photocatalyst’s surface. In this paper, we report that double metallic co-catalysts Ti3C2 MXene and metallic octahedral (1T) phase tungsten disulfide (WS2) act pathways transferring photoexcited electrons in assisting the photocatalytic H2 evolution. TiO2 nanosheets were in situ grown on highly conductive Ti3C2 MXenes and 1T-WS2 nanoparticles were then uniformly distributed on TiO2@Ti3C2 composite. Thus, a distinctive 1T-WS2@TiO2@Ti3C2 composite with double metallic co-catalysts was achieved, and the content of 1T phase reaches 73%. The photocatalytic H2 evolution performance of 1T-WS2@TiO2@Ti3C2 composite with an optimized 15 wt% WS2 ratio is nearly 50 times higher than that of TiO2 nanosheets because of conductive Ti3C2 MXene and 1T-WS2 resulting in the increase of electron transfer efficiency. Besides, the 1T-WS2 on the surface of TiO2@Ti3C2 composite enhances the Brunauer–Emmett–Teller surface area and boosts the density of active site.

Interfacial engineering of a zinc blende/wurtzite homojunction photocatalyst through hybridization with a cobalt phosphide co-catalyst for enhanced visible-light-driven photocatalytic H2 evolution

2020 ◽  
Vol 4 (4) ◽  
pp. 1822-1827
Author(s):  
Yi-Hao Chew ◽  
Boon-Junn Ng ◽  
Xin Ying Kong ◽  
Lutfi Kurnianditia Putri ◽  
Jie-Yinn Tang ◽  
...  
Keyword(s):  
Visible Light ◽  
H2 Evolution ◽  
Co Catalyst ◽  
Interfacial Engineering ◽  
Cobalt Phosphide ◽  
Zinc Blende ◽  
Visible Light Driven ◽  
Photocatalytic H2 Evolution

The synergy of integrating homojunction and heterojunction structures in one composite was demonstrated by combining CoP and ZB/WZ homojunction-containing Zn0.5Cd0.5S which showed a 20-times enhancement in photocatalytic H2 evolution activity.

Visible-Light-Responsive CuLi1/3Ti2/3O2 Powders Prepared by a Molten CuCl Treatment of Li2TiO3 for Photocatalytic H2 Evolution and Z-Schematic Water Splitting

2016 ◽  
Vol 28 (13) ◽  
pp. 4677-4685 ◽  
Author(s):  
Katsuya Iwashina ◽  
Akihide Iwase ◽  
Shunsuke Nozawa ◽  
Shin-ichi Adachi ◽  
Akihiko Kudo
Keyword(s):  
Visible Light ◽  
Water Splitting ◽  
H2 Evolution ◽  
Photocatalytic H2 Evolution

Efficient and stable photocatalytic H2 evolution by self‐assembly of Zirconium (IV) coordination with perylene diimide supramolecule under visible light irradiation

2021 ◽  
Author(s):  
Jianli Hua ◽  
Haoran Ding ◽  
Zhiqiang Wang ◽  
Kangyi Kong ◽  
Shufan Feng ◽  
...  
Keyword(s):  
Visible Light ◽  
Visible Light Irradiation ◽  
Self Assembly ◽  
Spectral Response ◽  
Charge Carriers ◽  
Perylene Diimide ◽  
H2 Evolution ◽  
Electron Mediator ◽  
Rapid Separation ◽  
Photocatalytic H2 Evolution

Wide spectral response and rapid separation and transfer of charge carriers are critical to the high activity of photocatalysts. Metal ions can work as an electron mediator to promote charge...

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