Abstract
A novel N,O modified Mn3O4@porou1s carbon catalyst(NOC-Mn3O4)was prepared by direct carboniza-tion using the manganese-metal organic framework(Mn-MOF)and covalent organic framework(COF)as precursors to activate peroxymonosulfate(PMS)for the degradation of bisphenol A(BPA)and rhodamine B(RhB).Benefiting from the N and O co-doping of COF,larger specific surface area,faster electron trans-fer and Mn cycling,the optimum 1NOC-Mn3O4 could significantly improve the degradation performance of BPA and RhB(92.1％and 96.9％within 30 min)as compared to C-Mn3O4 without COF doping.In addi-tion,1NOC-Mn3O4 showed good reusability and strong anti-interference ability.Radical quenching exper-iments,X-ray photoelectron spectroscopy(XPS),Electron paramagnetic resonance spectrometer(EPR)and electrochemical tests showed that the 1NOC-Mn3O4/PMS system degraded BPA and RhB by both radical and non-radical pathways.Moreover,the possible degradation pathways of BPA and RhB were proposed by liquid chromatography-mass spectrometry(LC-MS).Except for that,the toxicity of BPA,RhB and their intermediates were evaluated.This study opens up a new prospect for the design of COF-doped PMS catalysts.
基金项目
中央高校基本科研业务费专项(lzujbky-2022-59)
国家自然科学基金(51978319)
NETL
NSTL
万方数据