首页|Covalent organic frameworks doped with manganese-metal organic framework for peroxymonosulfate activation
Covalent organic frameworks doped with manganese-metal organic framework for peroxymonosulfate activation
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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.
Key Laboratory for Environmental Pollution Prediction and Control,College of Earth and Environmental Sciences,Lanzhou University,Lanzhou 730000,China
Key Laboratory of Pollutant Chemistry and Environmental Treatment,College of Chemistry and Environmental Science,Yili Normal University,Yining 835000,China
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