Issue 48, 2022

Hollow cubic CdS@CoS/WS2 dual S-scheme heterojunction superstructure toward optimized photothermal–photocatalytic performance

Abstract

A hollow polyhedral structure can effectively capture light and facilitate carrier separation, thus enhancing photocatalytic performance. Herein, hollow cubic CdS@CoS/WS2 dual S-scheme heterojunction superstructure photocatalysts are fabricated using a simple sulfidation and hydrothermal method. CdS@CoS/WS2 with a band gap of 1.59 eV and a relatively narrow band gap broadens the photoreaction to the near-infrared region and shows a good photothermal effect, which can promote photocatalytic reactions. It shows a relative specific surface area of 91.58 m2 g−1, which provides abundant surface-active sites to enhance the photocatalytic reaction. Under light conditions, the photocatalytic degradation ratios of CdS@CoS/WS2 for tetracycline and bisphenol A are up to 98.9 and 99.1%, and the hydrogen evolution efficiency is also up to 10.62 mmol h−1 g−1. The enhanced photothermal–photocatalytic performance could be due to the formation of a dual S-scheme heterojunction superstructure that facilitates space charge separation, a narrow band gap and a mesoporous hollow structure promoting solar light utilization, providing abundant surface-active sites and enhanced mass transfer. This simple strategy provides a new idea for the construction of high-performance hollow superstructure photocatalysts.

Graphical abstract: Hollow cubic CdS@CoS/WS2 dual S-scheme heterojunction superstructure toward optimized photothermal–photocatalytic performance

Supplementary files

Article information

Article type
Paper
Submitted
19 sen 2022
Accepted
09 noy 2022
First published
01 dek 2022

J. Mater. Chem. C, 2022,10, 18164-18173

Hollow cubic CdS@CoS/WS2 dual S-scheme heterojunction superstructure toward optimized photothermal–photocatalytic performance

W. Kong, Z. Xing, H. Zhang, B. Fang, Y. Cui, Z. Li, P. Chen and W. Zhou, J. Mater. Chem. C, 2022, 10, 18164 DOI: 10.1039/D2TC03943E

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