聚合有机框架的分子工程用于光催化从水中的进化
Jie Su1,2, Ping Li3, Feng Duan1
1Key Laboratory of Surface & Interface Science of Polymer Materials of Zhejiang Province, Department of Chemistry, Zhejiang Sci-Tech University, Hangzhou, 310018, P. R. China.
聚合有机框架 (COF) 中的部位的分子工程提高了它们在用于生产的光催化水分解中的性能. 由于电子转移和电荷分离的改善,TPPpm和TPBpy显示出更高的进化率.
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
- 绿色化学 绿色化学
背景情况:
- 联有机框架 (COF) 是通过水分解生成的有希望的光催化剂.
- 碳氧化的分子设计显著影响其光催化效率.
- 优化 (N) 部位对于提高COF性能至关重要.
研究的目的:
- 为了合成和研究一系列的β-基托胺COFs与各种站点工程.
- 为了将分子结构和N位点配置与光催化活性相关联.
- 为了确定高性能的COF,以实现高效的进化.
主要方法:
- 通过N位点的分子工程,合成四种β-基托胺COF:TpBD,TpPpy,TpPpm和TpBpy.
- 先进的表征技术,以分析材料属性.
- 光催化水分裂实验用于测量的生产速度.
- 理论计算以了解电荷转移动态.
主要成果:
- 具有更多位点 (TpPpm, TpBpy) 的COF表现出增强的电子转移和电荷分离.
- 与TpBd和TpPpy相比,TpPpm和TpBpy表现出较高的进化率 (分别为33.80和29.18 mmol g-1 h-1).
- 由于平面对称和N位点定位的差异,TpPpm比TpBpy表现出优越的光化学特性和光催化性能.
- 理论计算证实了TpPpm的异常分子内电荷转移能力.
结论:
- 对COF中位点的精确控制对于设计高效的光催化剂至关重要.
- 在β-基托胺COF中的N位点的分子工程可以显著提高的生产.
- TpPpm成为光催化水分裂应用的非常有前途的材料.
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