Issue 5, 2023

Photothermal-coupled solar photocatalytic CO2 reduction with high efficiency and selectivity on a MoO3−x@ZnIn2S4 core–shell S-scheme heterojunction

Abstract

Photocatalytic technology to convert CO2 into a chemical fuel is one of the most promising ways to alleviate the greenhouse effect. However, due to the low photocatalytic efficiency and poor product selectivity, the application of photocatalytic CO2 reduction is seriously limited. In this study, a MoO3−x@ZnIn2S4 composite with a core–shell structure is designed for the first time, and the combination of an S-scheme heterojunction and photothermal synergistic catalysis is successfully applied to full-spectrum solar photocatalytic CO2 reduction. Thanks to the cooperative effects of its unique hierarchical architecture, close interface contact, special charge-transfer pathway and high photothermal efficiency, the MoO3−x@ZnIn2S4 composite photocatalyst exhibits average yields of CO and CH4 up to 4.65 and 28.3 μmol g−1 h−1 under UV-Vis-IR irradiation without a sacrificial agent and cocatalyst. The average yield of CH4 is 19.4 and 11.7 times that of pure MoO3−x and ZnIn2S4 samples, respectively. Moreover, it also shows a CH4 selectivity as high as 85.89%.

Graphical abstract: Photothermal-coupled solar photocatalytic CO2 reduction with high efficiency and selectivity on a MoO3−x@ZnIn2S4 core–shell S-scheme heterojunction

Supplementary files

Article information

Article type
Paper
Submitted
28 nov 2022
Accepted
04 jan 2023
First published
05 jan 2023

J. Mater. Chem. A, 2023,11, 2178-2190

Photothermal-coupled solar photocatalytic CO2 reduction with high efficiency and selectivity on a MoO3−x@ZnIn2S4 core–shell S-scheme heterojunction

R. Xiong, X. Ke, W. Jia, Y. Xiao, B. Cheng and S. Lei, J. Mater. Chem. A, 2023, 11, 2178 DOI: 10.1039/D2TA09255G

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