Accelerated charge transfer via a nickel tungstate modulated cadmium sulfide p–n heterojunction for photocatalytic hydrogen evolution

2019 ◽  
Vol 9 (8) ◽  
pp. 1944-1960 ◽  
Author(s):  
Yongke Zhang ◽  
Zhiliang Jin
Keyword(s):  
Charge Transfer ◽  
Cadmium Sulfide ◽  
Hydrogen Evolution ◽  
Charge Separation ◽  
Photocatalytic Hydrogen Evolution ◽  
Accelerated Charge

Improving the efficiency of charge separation is an important aspect in photocatalysis.

Enhanced charge separation and photocatalytic hydrogen evolution in carbonized-polymer-dot-coupled lead halide perovskites

2020 ◽  
Vol 7 (10) ◽  
pp. 2719-2725 ◽  
Author(s):  
Yue Zhao ◽  
Qingsen Zeng ◽  
Yue Yu ◽  
Tanglue Feng ◽  
Yajie Zhao ◽  
...  
Keyword(s):  
Charge Transfer ◽  
Hydrogen Evolution ◽  
Charge Separation ◽  
Photocatalytic Performance ◽  
Metal Halide ◽  
Photocatalytic Hydrogen Evolution ◽  
Polymer Dots ◽  
Halide Perovskites ◽  
Lead Halide

This work demonstrates that carbonized polymer dots (CPDs) can efficiently promote the charge separation and photocatalytic performance of metal halide perovskites, highlighting their excellent charge-transfer ability and great potential in developing efficient perovskite-based hybrid photocatalysts.

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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