光催化
可见光谱
催化作用
单体
共价有机骨架
共价键
表面改性
氟
过氧化氢
光化学
材料科学
化学
氧气
聚合
分解水
氢
组合化学
化学工程
光催化
氮气
光诱导电荷分离
有机合成
制氢
纳米技术
表面工程
有机化学
过氧化物
高分子化学
反应机理
作者
Jun Zhang,Fei Xue,Zhonggang Wang
出处
期刊:Small
[Wiley]
日期:2025-10-30
卷期号:21 (49): e10448-e10448
被引量:3
标识
DOI:10.1002/smll.202510448
摘要
Abstract This study presents an approach of fluorinated nitrogen‐heterocycles in covalent organic frameworks (COFs) to achieve highly efficient photocatalytic synthesis of hydrogen peroxide (H 2 O 2 ). Specifically, two trifluoropyridyl‐ and trifluorophenyl‐functionalized triamino monomers are designed and synthesized. Their polycondensations with triformylphloroglucinol under solvothermal conditions create two fluorinated COFs (TFPyCOF and TFBCOF). Compared to TFBCOF, the simultaneous incorporation of fluorine and nitrogen in the aromatic heterocycles of TFPyCOF enhances the photo‐excited electron–hole separation and charge transfer. Meanwhile, the fluorinated TFPyCOF exhibits greatly improved surface hydrophilicity. As a result, under visible light catalysis, its H 2 O 2 production rate (HPR) in water and oxygen atmosphere considerably rises from 4575 µmol g −1 h −1 of TFBCOF to 8845 µmol g −1 h −1 without any sacrificial agent. Even though replacing oxygen gas with air as feedstock, the HPR of TFPyCOF still reaches 6381 µmol g −1 h −1 , which can compete with the highest value for the photocatalysts reported to date unther the similar condition. The revealed structure‐property relationships and synergistic mechanism of fluorine–nitrogen modification offer new insights into the molecular engineering for COF‐based photocatalysts to boost high photocatalytic performance.
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