Issue 2, 2023

CeO2/Cr2O3 direct Z-scheme heterojunction for photo-thermal synergistic catalytic isopropanol degradation and nitrogen fixation

Abstract

A CeO2/Cr2O3 composite heterojunction material is prepared by the combination of a water bath method and a high temperature calcination method. The CeO2/Cr2O3 composite shows enhanced photo-thermal synergistic catalytic activity in comparison with single component Cr2O3 and CeO2. The photo-thermal catalytic nitrogen fixation rate of the CeO2/Cr2O3 composite is 21.0 times that of Cr2O3 and 11.7 times that of CeO2. The photo-thermal catalytic isopropanol degradation rate of the CeO2/Cr2O3 composite is 1.3 times that of Cr2O3 and 3.0 times that of CeO2. The improved catalytic activity of the CeO2/Cr2O3 composite is attributed to the following three points. The CeO2/Cr2O3 heterojunction exhibits a Z-scheme charge transfer mechanism, and the photo-generated carriers have a strong redox ability. There are abundant oxygen vacancies in the CeO2/Cr2O3 composite, which can form a new impurity level leading to the weakening of carrier recombination. The CeO2/Cr2O3 composite has a large specific surface area, which can provide more catalytically reactive sites. Moreover, the photo-thermal catalytic isopropanol degradation activity of CeO2/Cr2O3 has no significant decrease after four cycle experiments, proving its good stability. This study inspires the design and construction of efficient photo-thermal catalysts in the field of air purification and energy conversion.

Graphical abstract: CeO2/Cr2O3 direct Z-scheme heterojunction for photo-thermal synergistic catalytic isopropanol degradation and nitrogen fixation

Article information

Article type
Paper
Submitted
22 Oct 2022
Accepted
21 Nov 2022
First published
24 Nov 2022

Catal. Sci. Technol., 2023,13, 490-503

CeO2/Cr2O3 direct Z-scheme heterojunction for photo-thermal synergistic catalytic isopropanol degradation and nitrogen fixation

K. Zhou, H. Sun, Y. Liu, Q. Wang, B. Liu, D. Li, H. Zhao, R. Tao and X. Fan, Catal. Sci. Technol., 2023, 13, 490 DOI: 10.1039/D2CY01832B

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