Recent Advances of CeO 2 -Based Composite Materials for Photocatalytic Applications.

Photocatalysis has the advantages of practical, sustainable and environmental protection, so it plays a significant role in energy transformation and environmental utilization. CeO 2 has attracted widespread attention for its unique 4 f electrons, rich defect structures, high oxygen storage capacity and great chemical stability. In this paper, we review the structure of CeO 2 and the common methods for the preparation of CeO 2 -based composites in the first part. In particular, we highlight the co-precipitation method, template method, and sol-gel method methods. Then, in the second part, we introduce the application of CeO 2 -based composites in photocatalysis, including photocatalytic CO 2 reduction, hydrogen production, degradation, selective organic reaction, and photocatalytic nitrogen fixation. In addition, we discuss several modification techniques to improve the photocatalytic performance of CeO 2 -based composites, such as elemental doping, defect engineering, constructing heterojunction and morphology regulation. Finally, the challenges faced by CeO 2 -based composites are analyzed and their development prospects are prospected. This review provides a systematic summary of the recent advance of CeO 2 -based composites in the field of photocatalysis, which can provide useful references for the rational design of efficient CeO 2 -based composite photocatalysts for sustainable development.