钴
化学
催化作用
氮化物
氮化碳
无机化学
三聚氰胺
选择性
氧气
部分
配位复合体
吸附
化学工程
有机化学
金属
光催化
工程类
图层(电子)
作者
Ziwei Wang,Eydhah Almatrafi,Han Wang,Hong Qin,Wenjun Wang,Li Du,Sha Chen,Guangming Zeng,Piao Xu
标识
DOI:10.1002/anie.202202338
摘要
Simultaneous regulation of the coordination environment of single-atom catalysts (SACs) and engineering architectures with efficient exposed active sites are efficient strategies for boosting peroxymonosulfate (PMS) activation. We isolated cobalt atoms with dual nitrogen and oxygen coordination (Co-N3 O1 ) on oxygen-doped tubular carbon nitride (TCN) by pyrolyzing a hydrogen-bonded cyanuric acid melamine-cobalt acetate precursor. The theoretically constructed Co-N3 O1 moiety on TCN exhibited an impressive mass activity of 7.61×105 min-1 mol-1 with high 1 O2 selectivity. Theoretical calculations revealed that the cobalt single atoms occupied a dual nitrogen and oxygen coordination environment, and that PMS adsorption was promoted and energy barriers reduced for the key *O intermediate that produced 1 O2 . The catalysts were attached to a widely used poly(vinylidene fluoride) microfiltration membrane to deliver an antibiotic wastewater treatment system with 97.5 % ciprofloxacin rejection over 10 hours, thereby revealing the suitability of the membrane for industrial applications.
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