在同态COF中利用重原子效应和链接工程来增强H2O2光合作用
Shaodong Jiang1,2, Hongyun Niu1,2, Yaqi Cai1,2,3
1State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, P. R. China.
Small (Weinheim an der Bergstrasse, Germany)
|February 2, 2026
概括
这项研究优化了光催化共价有机框架 (COF) 用于过氧化 (H2O2) 生产. 含硫的COF-127通过增强电荷分离和旋转轨道合来证明了高生产率.
科学领域:
- 材料科学 材料科学 材料科学
- 光催化作用的光催化
- 有机化学 有机化学
背景情况:
- 光催化共价有机框架 (COFs) 的性能取决于电子结构和形态.
- 在COF中纳入异原子,为H2O2生产等应用提供可调节的光电子特性.
研究的目的:
- 通过调整异原子类型和位置来合成和优化COF,以提高H2O2的生产.
- 研究硫异原子和分子结构对COF光催化性能的影响.
主要方法:
- 在两个类别中合成了十种COF,并进行了精确的异质原子调.
- 电子和带结构的表征与光催化活性相关联.
- 评估H2O2的生产速度和明显的量子产量 (AQY).
主要成果:
- 基于氨酸的COF-127实现了高的H2O2生产率 (6672μmol g-1h-1) 和AQY (11.03%).
- 硫的重原子效应增强了自旋轨道合和三重激子生成.
- 硫的引入改善了电荷分离和迁移,弥补了吸附能量障碍.
结论:
- 建立了基于"重原子基础与分子结构优化相结合"的COF光催化剂的合理设计范式.
- 硫,异原子类型和连接器几何学的协同效应共同调节带结构,载体动力学和反应能量学.
- 优化的COF显示出有效生产H2O2的巨大潜力.
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