Three-Dimensional Carbonaceous Aerogels Embedded with Rh-SrTiO3 for Enhanced Hydrogen Evolution Triggered by Efficient Charge Transfer and Light Absorption

2020 ◽  
Vol 3 (12) ◽  
pp. 12134-12147
Author(s):  
Ashish Kumar ◽  
Vempuluru Navakoteswara Rao ◽  
Ajay Kumar ◽  
Aamir Mushtaq ◽  
Lalita Sharma ◽  
...  
Keyword(s):  
Charge Transfer ◽  
Hydrogen Evolution ◽  
Light Absorption ◽  
Three Dimensional ◽  
Efficient Charge

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.

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.

In-situ C–H activation-derived polymer@TiO2 p-n heterojunction for efficient photocatalytic hydrogen evolution

2021 ◽  
Author(s):  
Yu-Qin Xing ◽  
Zhi-Rong Tan ◽  
Jingzhao Cheng ◽  
Zhao-Qi Shen ◽  
Yujie Zhang ◽  
...  
Keyword(s):  
Charge Transfer ◽  
Hydrogen Evolution ◽  
Photocatalytic Hydrogen Evolution ◽  
Inorganic Semiconductors ◽  
Efficient Charge ◽  
Semiconductor Heterojunctions

Semiconductor heterojunctions benefiting from efficient charge transfer and separation have been widely used in photocatalysis. Herein, heterojunctions based on polymeric and inorganic semiconductors, namely PyOT@TiO2, have been successfully constructed via...

Enhanced photoresponse and fast charge transfer: three-dimensional macroporous g-C3N4/GO-TiO2 nanostructure for hydrogen evolution

2020 ◽  
Vol 8 (37) ◽  
pp. 19533-19543 ◽  
Author(s):  
Wei Li ◽  
Qiong Ma ◽  
Xiao Wang ◽  
Xiao-shan Chu ◽  
Fei Wang ◽  
...  
Keyword(s):  
Charge Transfer ◽  
Hydrogen Evolution ◽  
Three Dimensional ◽  
Fast Charge ◽  
Highly Efficient ◽  
Adhesion Stability ◽  
Tio2 Nanostructure

Enhancing the adhesion stability of the anatase TiO2 cocatalyst on the three-dimensional macroporous g-C3N4/GO skeleton for highly efficient hydrogen evolution.

scholarly journals Synergetic Effect of In and Ag Co-Doped ZnS for Enhanced Photocatalytic Hydrogen Evolution under Visible Light Irradiation

2014 ◽  
Vol 1024 ◽  
pp. 368-371 ◽  
Author(s):  
Melody Kimi ◽  
Leny Yuliati ◽  
Mustaffa Shamsuddin
Keyword(s):  
Photocatalytic Activity ◽  
Visible Light ◽  
Hydrogen Evolution ◽  
Visible Light Irradiation ◽  
Light Absorption ◽  
Synergetic Effect ◽  
Band Gap Energy ◽  
Light Irradiation ◽  
Efficient Charge ◽  
Co Doped

In and Ag co-doped ZnS photocatalysts were successfully prepared by hydrothermal method to extend the light absorption of ZnS to the visible light region. The concentration of In was constant while for Ag was varied to optimize the photocatalytic activity. The In and Ag co-doped ZnS photocatalysts showed smaller band gap energy compared to single doped In (0.1)-ZnS and undoped ZnS. The photocatalytic activity of In and Ag co-doped ZnS photocatalysts was evaluated from the amount of hydrogen produced. The hydrogen evolution rate from aqueous solution containing Na2SO3 and Na2S as sacrificial reagent under visible light irradiation obtained from In and Ag co-doped ZnS is higher compared to the single doped In (0.1)-ZnS when optimum amount of Ag dopant was added. The highest photocatalytic activity is observed for In (0.1),Ag (0.01)-ZnS with hydrogen production rate of 26.82 μmol/h. The higher performance of this photocatalyst is ascribed to the extended visible light absorption, efficient charge separation as well as improved electron transfer associated with synergistic effect of appropriate amount of In and Ag co-doped ZnS.

Efficient charge transfer at a homogeneously distributed (NH4)2Mo3S13/WSe2 heterojunction for solar hydrogen evolution

2019 ◽  
Vol 7 (17) ◽  
pp. 10769-10780 ◽  
Author(s):  
Farabi Bozheyev ◽  
Fanxing Xi ◽  
Paul Plate ◽  
Thomas Dittrich ◽  
Sebastian Fiechter ◽  
...  
Keyword(s):  
Charge Transfer ◽  
Hydrogen Evolution ◽  
Solar Hydrogen ◽  
Earth Abundant ◽  
Efficient Charge

Efficient charge transfer is achieved by coating WSe2 photocathodes with an earth abundant photocatalyst – ammonium thiomolybdate (NH4)2Mo3S13.

High-performance hydrogen evolution at a MoSe2–Mo2C seamless heterojunction enabled by efficient charge transfer

2020 ◽  
Vol 8 (14) ◽  
pp. 6692-6698 ◽  
Author(s):  
Jing Li ◽  
Wenting Hong ◽  
Chuanyong Jian ◽  
Qian Cai ◽  
Xu He ◽  
...  
Keyword(s):  
Charge Transfer ◽  
Dft Calculations ◽  
Surface Area ◽  
Hydrogen Evolution ◽  
High Performance ◽  
Large Surface Area ◽  
Efficient Charge ◽  
Enhanced Conductivity

The heterojunction of Mo2C/MoSe2 with enhanced conductivity and large surface area is contributed to an efficient HER process. DFT calculations prove that there are MIGS in the interface between Mo2C and MoSe2, facilitating charge transfer for HER.

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