Boosting interfacial charge separation and photocatalytic activity of 2D/2D g-C3N4/ZnIn2S4S-scheme heterojunction under visible light irradiation

Deng, Xu ¹Wang, Dandan ¹Li, Hongji ¹Jiang, Wei ¹Zhou, Tianyu ¹Wen, Yan ¹Yu, Bo ¹Che, Guangbo ¹Wang, Liang¹

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作者信息

1. Jilin Normal Univ
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Abstract

It was an effective strategy to improve photocatalytic degradation performance by constructing step-scheme (S-scheme) heterojunction photocatalysts with superior photo-redox capacity and high charge transfer efficiency. In this study, two-dimensional/two-dimensional (2D/2D) S-scheme g-C3N4/ZnIn2S4 (CN/ZIS) heterojunction with different mass ratios were synthesized by the hydrothermal method. Transmission electron microscopy (TEM) analysis showed that ZnIn2S4 nanosheets with an average size of similar to 20 nm were coupled on the surface of ultra-thin graphitic carbon nitrogen (g-C3N4) nanosheets, which can effectively increase the contact area. UV-vis diffuse reflectance spectra (DRS), Photoluminescence spectra (PL) and photochemical tests showed that CN/ZIS had strong visible light absorption ability and photo-generated carriers transfer ability. Under visible light irradiation, CN/ZIS-10 degraded 93.41% of tetracycline (TC), which was 1.38 times than that of pristine g-C3N4. Moreover, the photocatalytic activity of CN/ZIS-10 was almost no change after five cycles. The S-scheme mechanism of CN/ZIS-10 was explored through electron spin response (ESR) and capture experiments of active species. In conclusion, this work provided a reasonable example for the construction of g-C3N4-based S-scheme heterojunction. (C) 2021 Published by Elsevier B.V.

Key words

ZnIn2S4/g-C3N4/S-scheme/Visible light/Photocatalysis/SCHEME HETEROJUNCTION/G-C3N4/DEGRADATION/DRIVEN/EVOLUTION/WATER

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出版年

2022

Journal of Alloys and Compounds

EISCI

ISSN：0925-8388

被引量69

参考文献量68

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