在现场设计共价有机框架,用于调节氧单硫酸激活,以产生单片氧,具有100%的选择性
Zonglin Weng1, Yuanfang Lin1, Siyuan Guo1
1Key Laboratory for City Cluster Environmental Safety and Green Development of the Ministry of Education, School of Ecology, Environment and Resources, Guangdong University of Technology, Guangzhou, 510006, P. R. China.
Angewandte Chemie (International ed. in English)
|September 5, 2023
概括
在先进的氧化过程中 (AOPs) 精确控制单片氧 (1 O2) 生产,使用工程共价有机框架 (COFs) 实现了这一目标. 这一突破增强了水处理中的有机污染物选择性降解.
科学领域:
- 环境化学环境化学
- 材料科学 材料科学 材料科学
- 催化剂是一种催化剂.
背景情况:
- 单点氧 (1 O2) 是一种关键的活性氧物种 (ROS),用于在高级氧化过程 (AOPs) 中选择性有机物转化.
- 在AOP中控制O2生成和理解其机制仍然具有挑战性,因为合成单站点催化剂存在困难.
研究的目的:
- 通过工程共价有机框架 (COFs) 精确调节基于过氧硫酸盐 (PMS) 的AOP中的ROS生成.
- 通过现场设计的COF来研究1O2生成的机制.
主要方法:
- 基于双胺的COF (BPY-COF) 和基于双的COF (BPD-COF) 的合成.
- 使用不同的COF,研究PMS激活途径 (激进与非激进).
- 对水中的有机污染物选择性降解的催化性能的评估.
主要成果:
- BPY-COFs通过非激进途径促进了PMS激活,产生100%的1O2.
- BPD-COFs激活了PMS,产生了激素 (•OH和SO4•−).
- 与BPD-COFs/PMS相比,BPY-COFs/PMS系统显示污染物降解效率增加了9.4倍.
结论:
- 在COF的现场工程使得基于PMS的AOP能够精确控制ROS的产生.
- BPY-COFs通过一个独特的PMS激活机制有效地产生1O2,该机制涉及化-N原子.
- 开发的BPY-COFs/PMS系统为选择性水污染物降解提供了一种高效的方法.
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