污染物
催化作用
电子转移
光催化
电子顺磁共振
猝灭(荧光)
膜
纳米颗粒
化学
降级(电信)
光化学
阴极
核化学
化学工程
物理
有机化学
荧光
工程类
物理化学
量子力学
电信
生物化学
核磁共振
计算机科学
作者
Pijun Duan,Xing Xu,Kangying Guo,Qinyan Yue,Baoyu Gao
标识
DOI:10.1016/j.apcatb.2022.121695
摘要
We present a chainmail catalyst (N-doped carbon nanotube-confined FeMn nanoparticles, [email protected]) for activation of peroxymonosulfate (PMS) to eliminate organic micropollutants (OMPs). Complete removal of 50 μM 4-chlorophenol (4-CP) was achieved in 7 min. Radical quenching tests and electron paramagnetic resonance suggested that an electron transfer process (ETP) dominated the degradation of pollutants, while •OH and •SO4- were the secondary oxidants. In an upgraded galvanic oxidation system, the surge of current and the decrease of in-situ cathode potential after adding 4-CP indicated the electron shuttle rather than adjacent transfer mechanism dominated ETP. A novel spray-crosslinking method was introduced to deposit powder [email protected] on a commercial ceramic membrane. The coated membrane exhibited a negligible decrease of water flux, excellent mechanical stability and outstanding OMP elimination performance. This study provides new insights into ETP and advances the application of powder catalysts in combined filtration/oxidation water treatment processes.
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