乙烯连接的共价有机框架与促进的质子转移用于H2O的光催化演化
Xiang Hu1, Jinghui Wang1, Hao Zhu1
1Department of Physics, Shaoxing University, 508 Huanchengxi Road, Shaoxing, 312000, China.
联有机框架 (COFs) 通过光催化增强了过氧化的产生. 添加氨离子通过改善光吸收和质子导电性来提高性能超过八倍.
科学领域:
- 材料科学 材料科学 材料科学
- 催化剂是一种催化剂.
- 摄影化学的使用.
背景情况:
- 联有机框架 (COF) 是通过氧降解反应 (ORR) 合成绿色过氧化 (H2O2) 的有希望的光催化剂.
- 质子运输对ORR动力学至关重要,通常通过结构COF修改来改善,但添加方法的探索较少.
研究的目的:
- 为了合成和表征新的乙烯相关的COF (g-TDM-COF和g-TBD-COF).
- 为了研究离子组合对COFs光催化性能对H2O2生产的影响.
主要方法:
- 用于COF合成的Knoevenagel冷凝.
- 描述COF的结构,多孔性和半导体性质.
- 对H2O2生产进行光催化测试,使用或不使用离子添加剂.
主要成果:
- 合成了两个新的六角形,AA堆叠的COF (g-TDM-COF,g-TBD-COF) 具有高表面积和微/纳米通道.
- 用氨离子组合COF导致光催化H2O2生产增加了八倍.
- 表面量子产量 (AQYs) 在500nm增加氨离子后从0.70%增加到4.22%.
结论:
- 离子通过结合与COF相互作用,增强光收获,缩小带间隙,改善质子导电性.
- 简单的离子合成显著提高了COF光催化效率,用于H2O2合成.
- 这种添加剂策略为增强基于COF的光催化剂提供了一个有前途的途径.
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