Issue 18, 2021

Design of a ZnS/CdS/rGO composite nanosheet photocatalyst with multi-interface electron transfer for high conversion of CO2

Abstract

Constructing a multi-interface electron transfer path is one of the ideal methods to improve the migration rate of photogenerated electrons in semiconductors. In this work, a ZnS/CdS NSs heterojunction was engineered on the surface of reduced graphene oxide (rGO) by calcination and hydrothermal methods, combining the electron transfer ability of the heterojunction with the electron capture ability of graphene. In ZnS/CdS/rGO, the photogenerated electrons transfer from ZnS → CdS, CdS → rGO and ZnS → CdS → rGO, establishing the multi-interface transfer path and improving the migration efficiency of photogenerated electrons. Furthermore, the existence of rGO greatly improves the CO2 molecule adsorption ability and the material stability of the photocatalyst. As expected, the as-prepared ZnS/CdS/rGO photocatalyst shows excellent performance in photoreduction of CO2 and the yield of CO was 38.77 μmol g−1 after 4 h UV-vis light irradiation, which is 21.7 times that of pure ZnS NSs (1.78 μmol g−1). The ZnS/CdS/rGO photocatalyst also displays favorable stability after multiple photocatalytic cycles. Lastly, the possible reaction mechanism is discussed in detail.

Graphical abstract: Design of a ZnS/CdS/rGO composite nanosheet photocatalyst with multi-interface electron transfer for high conversion of CO2

Supplementary files

Article information

Article type
Paper
Submitted
29 Jun 2021
Accepted
22 Jul 2021
First published
22 Jul 2021

Sustainable Energy Fuels, 2021,5, 4606-4617

Design of a ZnS/CdS/rGO composite nanosheet photocatalyst with multi-interface electron transfer for high conversion of CO2

M. Xu, H. Jiang, X. Li, M. Gao, Q. Liu, H. Wang, P. Huo and S. Chen, Sustainable Energy Fuels, 2021, 5, 4606 DOI: 10.1039/D1SE00974E

To request permission to reproduce material from this article, please go to the Copyright Clearance Center request page.

If you are an author contributing to an RSC publication, you do not need to request permission provided correct acknowledgement is given.

If you are the author of this article, you do not need to request permission to reproduce figures and diagrams provided correct acknowledgement is given. If you want to reproduce the whole article in a third-party publication (excluding your thesis/dissertation for which permission is not required) please go to the Copyright Clearance Center request page.

Read more about how to correctly acknowledge RSC content.

Social activity

Spotlight

Advertisements