Oxygen-Deficient Engineering for Perovskite Oxides in the Application of AOPs: Regulation, Detection, and Reduction Mechanism

A perovskite catalyst combined with various advanced oxidation processes (AOPs) to treat organic wastewater attracted extensive attention. The physical and chemical catalytic properties of perovskite were largely related to oxygen vacancies (OVs). In this paper, the recent advances in the regulation of OVs in perovskite for enhancing the functionality of the catalyst was reviewed, such as substitution, doping, heat treatment, wet-chemical redox reaction, exsolution, and etching. The techniques of detecting the OVs were also reviewed. An insight was provided into the OVs of perovskite and reduction mechanism in AOPs in this review, which is helpful for the reader to better understand the methods of regulating and detecting OVs in various AOPs.

Automated summary

This paper reviewed the recent advances in regulating oxygen vacancies (OVs) in perovskite to enhance the functionality of the catalyst for treating organic wastewater using various advanced oxidation processes (AOPs), including substitution, doping, heat treatment, wet-chemical redox reaction, exsolution, and etching. The techniques for detecting OVs were also summarized. It provided insights into the OVs of perovskite and reduction mechanism in AOPs, which is helpful for understanding the methods of regulating and detecting OVs in various AOPs.