与醇相关的共价有机框架的链接微环境精确调节了过氧化的光催化生成
Yi Mou1, Xiaodong Wu2, Chencheng Qin1
1College of Environmental Science and Engineering, Key Laboratory of Environmental Biology and Pollution Control, Hunan University, Changsha, 410082, P. R. China.
Angewandte Chemie (International ed. in English)
|July 18, 2023
概括
与醇相关的共价有机框架 (COF) 显示了人工光合作用的增强光催化作用. 这项研究表明, thiazole 连接改善了废水处理的 COF 中的电荷转移和 H2O2 生产.
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
- 环境化学环境化学
背景情况:
- 使用共价有机框架 (COFs) 的人工光合作用为废水处理提供了一个有前途的途径.
- 了解链接化学对COF光电化学性质的影响对于优化光催化是至关重要的.
研究的目的:
- 为了研究醇结合化学 (thiazole,oxazole,imidazole) 对人工H2O2光合作用中COF的性能的影响.
- 阐明控制COF中电荷转移和光催化活性的结构-属性关系.
主要方法:
- 三种与醇相关的COF的合成:与醇相关的TZ-COF,与醇相关的OZ-COF和与伊米达相关的IZ-COF.
- 光电化学表征以评估电荷转移特性.
- 密度函数理论 (DFT) 计算,以了解反应机制和中间体形成.
主要成果:
- 由于捐赠者-π-接受器结构,TZ-COF表现出增强的电荷转移,抑制了电荷重组.
- DFT的计算表明,在H2O2生产过程中,与氧化和伊米达相比,提亚连接对O2中间体形成更有利.
- 在COF中确定了活性位点,该活性位点位于烯单元和醇结合之间的烯环片段.
结论:
- 碳氧化的结合化学显著影响其光电化学性质和光催化效率.
- 与醇相关的COF在人工H2O2光合作用中表现出卓越的性能,突出了它们在废水处理应用中的潜力.
- 基于链接化学的COF的合理设计是开发先进光催化剂的关键.
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