scholarly journals Alkene‐Linked Covalent Organic Frameworks Boosting Photocatalytic Hydrogen Evolution by Efficient Charge Separation and Transfer in the Presence of Sacrificial Electron Donors

2020 ◽  
Vol 7 (12) ◽  
pp. 1902988 ◽  
Author(s):  
Chunshao Mo ◽  
Meijia Yang ◽  
Fusai Sun ◽  
Junhua Jian ◽  
Linfeng Zhong ◽  
...  
Keyword(s):  
Hydrogen Evolution ◽  
Charge Separation ◽  
Electron Donors ◽  
Covalent Organic Frameworks ◽  
Photocatalytic Hydrogen Evolution ◽  
Efficient Charge

Engineering surface defects on two-dimensional ultrathin mesoporous anatase TiO2 nanosheets for efficient charge separation and exceptional solar-driven photocatalytic hydrogen evolution

2020 ◽  
Vol 8 (10) ◽  
pp. 3476-3482 ◽  
Author(s):  
Jiaxing Wu ◽  
Panzhe Qiao ◽  
Haoze Li ◽  
Yachao Xu ◽  
Wutao Yang ◽  
...  
Keyword(s):  
Hydrogen Evolution ◽  
Self Assembly ◽  
Charge Separation ◽  
Surface Defects ◽  
Anatase Tio2 ◽  
Two Dimensional ◽  
Photocatalytic Hydrogen Evolution ◽  
Tio2 Nanosheets ◽  
Evaporation Induced Self Assembly ◽  
Efficient Charge

Two-dimensional ultrathin mesoporous anatase TiO2 nanosheets with engineered surface defects are fabricated via evaporation-induced self-assembly, solvothermal and hydrogenation, which exhibit excellent photocatalytic hydrogen evolution.

Facile synthesis of tin-doped polymeric carbon nitride with a hole-trapping center for efficient charge separation and photocatalytic hydrogen evolution

2019 ◽  
Vol 7 (45) ◽  
pp. 25824-25829 ◽  
Author(s):  
Zhiwei Liang ◽  
Yuguo Xia ◽  
Guiming Ba ◽  
Haiping Li ◽  
Quanhua Deng ◽  
...  
Keyword(s):  
Hydrogen Evolution ◽  
Charge Separation ◽  
Carbon Nitride ◽  
Facile Synthesis ◽  
Photocatalytic Hydrogen Evolution ◽  
Hole Capture ◽  
Hole Trapping ◽  
Efficient Charge ◽  
Polymeric Carbon ◽  
First Time

For the first time, Sn-doped polymeric carbon nitride was synthesized with N–Sn bonds working as hole-capture centers for enhanced photocatalytic hydrogen evolution.

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.

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