Exploitation of the synergistic effect between surface and bulk defects in ultra-small N-doped titanium suboxides for enhancing photocatalytic hydrogen evolution

2018 ◽  
Vol 8 (21) ◽  
pp. 5515-5525 ◽  
Author(s):  
Hui-Jun Li ◽  
Nan-Quan Ou ◽  
Xiong Sun ◽  
Bo-Wen Sun ◽  
Dong-Jin Qian ◽  
...  
Keyword(s):  
Photocatalytic Activity ◽  
Synergistic Effect ◽  
Hydrogen Evolution ◽  
Photocatalytic Hydrogen Evolution ◽  
Small N

The work utilizes the “double-faced” roles of surface and bulk defects in engineering photocatalytic activity.

Cobalt ion redox and conductive polymers boosted the photocatalytic activity of the graphite carbon nitride–Co3O4 Z-scheme heterostructure

2021 ◽  
Vol 45 (1) ◽  
pp. 162-168
Author(s):  
Tao Li ◽  
Jiandong Cui ◽  
Yezhan Lin ◽  
Kecheng Liu ◽  
Rui Li ◽  
...  
Keyword(s):  
Photocatalytic Activity ◽  
Synergistic Effect ◽  
Hydrogen Evolution ◽  
Carbon Nitride ◽  
Conductive Polymers ◽  
Cobalt Ion ◽  
Photocatalytic Hydrogen Evolution ◽  
Conductive Polyaniline

The enhanced photocatalytic hydrogen evolution performance of g-C3N4–Co3O4 2D–1D Z-scheme heterojunctions was achieved through the synergistic effect of the cobalt ion redox, conductive polyaniline, and a Co3O4 nanobelt.

scholarly journals Conjugated Polymer Donor-Molecular Acceptor Nanohybrids for Photocatalytic Hydrogen Evolution

2019 ◽  
Author(s):  
Haofan Yang ◽  
Xiaobo Li ◽  
Reiner Sebastian Sprick ◽  
Andrew I. Cooper
Keyword(s):  
Photocatalytic Activity ◽  
Charge Transfer ◽  
Conjugated Polymers ◽  
Hydrogen Evolution ◽  
Conjugated Polymer ◽  
Apparent Quantum Yield ◽  
High Hydrogen ◽  
Photocatalytic Hydrogen Evolution ◽  
Efficient Charge ◽  
Donor Acceptor

A library of 237 organic binary/ternary nanohybrids consisting of conjugated polymers donors and both fullerene and non-fullerene molecular acceptors was prepared and screened for sacrificial photocatalytic hydrogen evolution. These donor-acceptor nanohybrids (DANHs) showed significantly enhanced hydrogen evolution rates compared with the parent donor or acceptor compounds. DANHs of <a></a><a>a polycarbazole</a>-based donor combined with a methanofullerene acceptor (PCDTBT/PC<sub>60</sub>BM) showed a high hydrogen evolution rate of 105.2 mmol g<sup>-1</sup> h<sup>-1</sup> under visible light (λ > 420 nm). This DANH photocatalyst produced 5.9 times more hydrogen than a sulfone-containing polymer (P10) under the same conditions, which is one of the most efficient organic photocatalysts reported so far. An apparent quantum yield of hydrogen evolution of 3.0 % at 595 nm was measured for this DANH. The photocatalytic activity of the DANHs, which in optimized cases reached 179.0 mmol g<sup>-1</sup> h<sup>-1</sup>, is attributed to efficient charge transfer at the polymer donor/molecular acceptor interface. We also show that ternary donor<sub>A</sub>-donor<sub>B</sub>-acceptor nanohybrids can give higher activities than binary donor-acceptor hybrids in some cases.

Fabrication of selective interface of ZnO/CdS heterostructures for more efficient photocatalytic hydrogen evolution

2018 ◽  
Vol 47 (35) ◽  
pp. 12162-12171 ◽  
Author(s):  
Xinlong Ma ◽  
Fei Zhao ◽  
Qinping Qiang ◽  
Tongyao Liu ◽  
Yuhua Wang
Keyword(s):  
Photocatalytic Activity ◽  
Hydrogen Evolution ◽  
Photocatalytic Hydrogen Evolution

Selective interface in ZnO/CdS heterostructure promote the photocatalytic activity.

Hydrogenated ZnIn2S4 microspheres: boosting photocatalytic hydrogen evolution by sulfur vacancy engineering and mechanism insight

2019 ◽  
Vol 21 (45) ◽  
pp. 25484-25494 ◽  
Author(s):  
Yanze Wang ◽  
Da Chen ◽  
Laishun Qin ◽  
Junhui Liang ◽  
Yuexiang Huang
Keyword(s):  
Photocatalytic Activity ◽  
Hydrogen Evolution ◽  
Sulfur Vacancy ◽  
Photocatalytic Hydrogen Evolution

The correlation between hydrogenation-induced surface sulfur vacancies and photocatalytic activity of hydrogenated ZnIn2S4 is tentatively proposed in this work.

Substituent effect of conjugated microporous polymers on the photocatalytic hydrogen evolution activity

2020 ◽  
Vol 8 (5) ◽  
pp. 2404-2411 ◽  
Author(s):  
Xiaomin Gao ◽  
Chang Shu ◽  
Chong Zhang ◽  
Wenyan Ma ◽  
Shi-Bin Ren ◽  
...  
Keyword(s):  
Photocatalytic Activity ◽  
Hydrogen Evolution ◽  
Substituent Effect ◽  
Evolution Rate ◽  
Photocatalytic Hydrogen Evolution ◽  
Microporous Polymers ◽  
Hydrogen Evolution Rate ◽  
Conjugated Microporous Polymers

The influence of substituent groups on the photocatalytic activity of conjugated microporous polymers was investigated, and a high photocatalytic hydrogen evolution rate of 18.93 mmol h−1 g−1 was achieved by PyDF with fluorine atoms.

scholarly journals pH dependent photocatalytic hydrogen evolution by self-assembled perylene bisimides

2017 ◽  
Vol 5 (16) ◽  
pp. 7555-7563 ◽  
Author(s):  
Michael C. Nolan ◽  
James J. Walsh ◽  
Laura L. E. Mears ◽  
Emily R. Draper ◽  
Matthew Wallace ◽  
...  
Keyword(s):  
Photocatalytic Activity ◽  
Hydrogen Evolution ◽  
Self Assembly ◽  
The Self ◽  
Photocatalytic Hydrogen Evolution ◽  
Perylene Bisimide ◽  
Ph Dependent ◽  
Self Assembled ◽  
Perylene Bisimides

We show the importance of the self-assembly of a perylene bisimide on its photocatalytic activity.

scholarly journals Structural effects of two-dimensional perovskite Ca2Nb2TaO10− nanosheets for photocatalytic hydrogen evolution

2016 ◽  
Vol 6 (4) ◽  
pp. 1064-1069 ◽  
Author(s):  
Kazuhiko Maeda ◽  
Miharu Eguchi
Keyword(s):  
Photocatalytic Activity ◽  
Band Gap ◽  
Hydrogen Evolution ◽  
Two Dimensional ◽  
Structural Effects ◽  
Photocatalytic Hydrogen Evolution

Photocatalytic activity of restacked ACa2Nb2TaO10 (A = H, Li, Na, K, Rb, Cs) nanosheets for H2 evolution under band-gap irradiation (λ > 300 nm) was enhanced not upon hydration of the interlayer nanospace, but by protonation.

scholarly journals Conjugated Polymer Donor-Molecular Acceptor Nanohybrids for Photocatalytic Hydrogen Evolution

2019 ◽  
Author(s):  
Haofan Yang ◽  
Xiaobo Li ◽  
Reiner Sebastian Sprick ◽  
Andrew I. Cooper
Keyword(s):  
Photocatalytic Activity ◽  
Charge Transfer ◽  
Conjugated Polymers ◽  
Hydrogen Evolution ◽  
Conjugated Polymer ◽  
Apparent Quantum Yield ◽  
High Hydrogen ◽  
Photocatalytic Hydrogen Evolution ◽  
Efficient Charge ◽  
Donor Acceptor

A library of 237 organic binary/ternary nanohybrids consisting of conjugated polymers donors and both fullerene and non-fullerene molecular acceptors was prepared and screened for sacrificial photocatalytic hydrogen evolution. These donor-acceptor nanohybrids (DANHs) showed significantly enhanced hydrogen evolution rates compared with the parent donor or acceptor compounds. DANHs of <a></a><a>a polycarbazole</a>-based donor combined with a methanofullerene acceptor (PCDTBT/PC<sub>60</sub>BM) showed a high hydrogen evolution rate of 105.2 mmol g<sup>-1</sup> h<sup>-1</sup> under visible light (λ > 420 nm). This DANH photocatalyst produced 5.9 times more hydrogen than a sulfone-containing polymer (P10) under the same conditions, which is one of the most efficient organic photocatalysts reported so far. An apparent quantum yield of hydrogen evolution of 3.0 % at 595 nm was measured for this DANH. The photocatalytic activity of the DANHs, which in optimized cases reached 179.0 mmol g<sup>-1</sup> h<sup>-1</sup>, is attributed to efficient charge transfer at the polymer donor/molecular acceptor interface. We also show that ternary donor<sub>A</sub>-donor<sub>B</sub>-acceptor nanohybrids can give higher activities than binary donor-acceptor hybrids in some cases.

Oxygen vacancy modulation of two-dimensional γ-Ga2O3 nanosheets as efficient catalysts for photocatalytic hydrogen evolution

Nanoscale ◽  
2018 ◽  
Vol 10 (45) ◽  
pp. 21509-21517 ◽  
Author(s):  
Xiaoyan Zhang ◽  
Zizhong Zhang ◽  
Huijuan Huang ◽  
Ying Wang ◽  
Na Tong ◽  
...  
Keyword(s):  
Photocatalytic Activity ◽  
Oxygen Vacancy ◽  
Hydrogen Evolution ◽  
Two Dimensional ◽  
Photocatalytic Hydrogen Evolution ◽  
Vacancy Concentrations

γ-Ga2O3 nanosheets with different thicknesses and oxygen vacancy concentrations were fabricated to study their effects on photocatalytic activity.

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