Calcination‐regulated Microstructures of Donor‐Acceptor Polymers towards Enhanced and Stable Photocatalytic H 2 O 2 Production in Pure Water

作者：Chao Yang, Sijie Wan, Bicheng Zhu, Jiaguo Yu, Shaowen Cao · 发表于：Angewandte Chemie International Edition · 年份：2022 · DOI：10.1002/anie.202208438 · 被引用次数：208 · 研究领域：Advanced Photocatalysis Techniques、Covalent Organic Framework Applications、Perovskite Materials and Applications

Abstract Regulating molecular structure of donor‐acceptor (D‐A) polymer is a promising strategy to improve photoactivity. Herein, a porous nanorod‐like D‐A polymer is synthesized via a strategy of supramolecular chemistry combined with subsequent calcination treatment. This polymer consists of benzene rings (D) and triazine (A) that are linked by amido bond (−CONH−). −CONH− further partially cracks into cyano groups (−C≡N) (A) under calcination. The ratio of benzene to triazine could be tuned to adjust the −C≡N content by varying the calcination atmosphere. Such regulation of molecular structure could modulate the band structure of D‐A polymer and endow it with unique porous nanorod‐like morphology, leading to the achievement of two‐electron oxygen reduction and two‐electron water oxidation and the improvement of exciton splitting, O 2 adsorption and activation. These merits synergistically ensure a highly efficient and stable photocatalytic H 2 O 2 production in pure water.