Enhanced activation of peroxymonosulfate by Fe/N co-doped ordered mesoporous carbon with dual active sites for efficient removal of m-cresol  

作　　者：Donghui Li Wenzhe Wu Xue Ren Xixi Zhao Hongbing Song Meng Xiao Quanhong Zhu Hengjun Gai Tingting Huang 

机构地区：[1]College of Chemical Engineering,Qingdao University of Science and Technology,Qingdao 266042,China [2]School of Chemical&Environmental Engineering,China University of Mining&Technology-Beijing,Beijing 100083,China

出　　处：《Chinese Journal of Chemical Engineering》2024年第1期130-144,共15页中国化学工程学报（英文版）

基　　金：gratefully acknowledge the financial support of the National Natural Science Foundation of China(22108145 and 21978143);the Shandong Province Natural Science Foundation(ZR2020QB189);State Key Laboratory of Heavy Oil Processing(SKLHOP202203008);the Talent Foundation funded by Province and Ministry Co-construction Collaborative Innovation Center of Eco-chemical Engineering(STHGYX2201).

摘　　要：The novel Fe-N co-doped ordered mesoporous carbon with high catalytic activity in m-cresol removal was prepared by urea-assisted impregnation and simple pyrolysis method.During the preparation of the Fe-NC catalyst,the complexation of N elements in urea could anchor Fe,and the formation of C3N4during urea pyrolysis could also prevent migration and aggregation of Fe species,which jointly improve the dispersion and stability of Fe.The FeN4sites and highly dispersed Fe nanoparticles synergistically trigger the dual-site peroxymonosulfate (PMS) activation for highly efficient m-cresol degradation,while the ordered mesoporous structure of the catalyst could improve the mass transfer rate of the catalytic process,which together promote catalytic degradation of m-cresol by PMS activation.Reactive oxygen species (ROS) analytic experiments demonstrate that the system degrades m-cresol by free radical pathway mainly based on SO_(4)^(-)·and·OH,and partially based on·OH as the active components,and a possible PMS activation mechanism by 5Fe-50 for m-cresol degradation was proposed.This study can provide theoretical guidance for the preparation of efficient and stable catalysts for the degradation of organic pollutants by activated PMS.

关 键 词：Degradation PEROXYMONOSULFATE Fe(II)/Fe(III)/FeN4 Ordered mesopores carbon Catalyst Radical 

分 类 号：O643.36[理学—物理化学] X703[理学—化学]