钴
材料科学
复合数
降级(电信)
X射线光电子能谱
吸附
化学
金属
催化作用
无机化学
化学工程
核化学
吸附
有机化学
冶金
复合材料
工程类
电信
计算机科学
作者
Limei Dong,Yiming Li,Xiuping Chen,Dan Zhang,Yi Guan
标识
DOI:10.1002/admi.202100178
摘要
Abstract Poor sorption capacity and low biodegradability of carbamazepine (CBZ) lead to the difficulties in CBZ removal from water. Sulfate radical‐based advanced oxidation process shows great potential for organic pollutant removal. Metal organic frameworks (MOFs) demonstrate great potential in catalytic field due to their excellent properties. Hence, cobalt‐based metal organic framework (ZIF‐67) nanoparticles are loaded on Fe 3 O 4 ‐MnO 2 composite, and then this composite is applied as peroxymonosulfate (PMS) activator for CBZ degradation. The prepared catalyst exhibits excellent catalytic performance because of the central metal cobalt of ZIF‐67 and the synergistic effect between MnO 2 and ZIF‐67. 81% of CBZ with a high initial concentration of 20 mg L −1 is rapidly removed from water within 2.5 min. The prepared catalyst can be convenient to recycle under magnetic field while maintaining its high catalytic stability. Degradation mechanism analysis indicates that both • OH and SO 4 •− contribute to CBZ degradation, but SO 4 •− is the main radical species. XPS spectra reveal that Co(II)/Co(III), Mn(II)/Mn(III)/Mn(IV), and Fe(II)/Fe(III) are involved in PMS activation. The degradation pathway is put forward based on the detection of intermediates. This study provides a new inspiration for the fabrication of magnetic metal oxide‐MOFs catalysts with outstanding recycling performance for PMS activation.
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