Advancements in controlling COFs structure for enhanced crystallization properties and self-generated photocatalytic hydrogen peroxide

Abstract

Covalent organic frameworks (COFs) have shown significant advancements in the realm of photocatalytic hydrogen peroxide (H₂O₂) production, attributed to their exceptional crystallinity, ordered porosity, abundance of active sites, pre-designed functional groups, and outstanding stability. This review delves into the impact of COFs' crystallinity on their photocatalytic efficacy, particularly in H₂O₂ generation, it systematically summarizes the structural benefits and research advancements in H₂O₂ production using these long-range ordered crystalline COFs, focusing on enhancing visible light absorption, optimizing charge separation and migration, improving material stability, and providing active sites. Additionally, the strategies to enhance COFs' crystallinity through optimization of polymerization reaction conditions and precise modulation of intermolecular interactions are discussed. Furthermore, various modulation techniques to enhance H₂O₂ efficiency are explored. By elucidating the relationship between COFs' crystallinity and photocatalytic H₂O₂ production, this review not only enhances the comprehension of the structure–property correlation of COFs but also offers valuable guidance and a scientific foundation for the development of highly efficient and innovative crystalline COFs for H₂O₂ applications.