Strategies for improving perovskite photocatalysts reactivity for organic pollutants degradation: A review on recent progress

Perovskite oxides have been recognized as highly potent catalysts for photocatalytic water decontamination due to their potential to capture solar energy and drive catalytic reaction. However, pristine perovskite catalysts have inherent drawbacks such as low surface area, rapid recombination of photogenerated charge carriers and low solar light utilization efficiency, which limited their practical water treatment application. For the purpose of effective photocatalytic water purification, significant efforts have been emphasized on promoting perovskite reactivity in recent years. This review aims to summarize recent progress of tunning strategies and coupling Advanced oxidation processes (AOPs) methods for improving perovskite photocatalyst reactivity, destined for the decontamination of organic pollutants in wastewater. The general principles of designing perovskite photocatalysts for water decontamination are introduced for basic understanding of involved mechanism. Diverse perovskite regulating strategies such as hetero-substitution, decoration, as well as structure regulation have been discussed in detail to provide a comprehensive view of strategies that improve perovskite photocatalytic activity. In addition, recent rapid development of coupling various AOPs with perovskite for improved water remediation via collaborative effects are presented. Finally, the remaining challenges and possible future directions of practical perovskite photocatalytic water purification are also discussed. This review provides useful insight for efficient application of perovskite photocatalyst in water purification.