Metal-free diatomaceous carbon-based catalyst for ultrafast and anti-interference Fenton-like oxidation  

作　　者：Kexin Yin Jingren Yang Yanwei Li Qian Li Xing Xu 

机构地区：[1]Shandong Key Laboratory of Water Pollution Control and Resource Reuse,School of Environmental Science and Engineering,Shandong University,Qingdao 266237,China [2]Environment Research Institute,Shandong University,Qingdao 266237,China [3]State Environmental Protection Key Laboratory of Environmental Health Impact Assessment of Emerging Contaminants,Shanghai Academy of Environmental Sciences,Shanghai 200233,China

出　　处：《Chinese Chemical Letters》2024年第12期351-355,共5页中国化学快报（英文版）

基　　金：supported by National Natural Science Foundation of China(No.52170086);Shandong Provincial Excellent Youth(No.ZR2022YQ47)。

摘　　要：Herein,a diatomite biomorphic Si-O doped carbon-based catalyst(DB-SiOC)was prepared using natura mineral diatomite as the silicon source and porous template.The results showed that the metal-free DB SiOC catalyst exhibited ultrafast oxidation towards chlorophenol(CP)via peroxymonosulfate(PMS)activa tion,which was almost one order of magnitudes than most of carbon-based catalysts.The DB-SiOC/PMS system also showed the high ability to resist the interference of environmental matrix.The radicals(^(·)OH and SO_(4)^(·–))exhibited a very small contribution to the CP oxidation while the electron transfer processe(ETP)played the major role in the DB-SiOC/PMS system.The electron shuttles from the electron-donating CP molecules to the adjacent DB-SiOC/PMS^(*)could be efficiently triggered via Si-O bonds as bridges,mak ing it possible for ultrafast oxidation of CP.In addition,the hollow-disc shaped DB-Si OC provided the biomorphic DE structures with abundant pores for enriching the PMS and pollutants,thus further ac celerating the oxidation reaction.This work provided a new routine for the fabrication of Si-O doped carbon-based catalysts with excellent Fenton-like catalytic activity,which would greatly promote thei application prospects in Fenton-like systems.

关 键 词：Peroxymonosulfate Diatomite Si-O doping Fenton-like reaction Electron transfer process(ETP) 

分 类 号：O643.36[理学—物理化学] X703[理学—化学]