Covalent organic frameworks doped with manganese-metal organic framework for peroxymonosulfate activation

作     者：Yinyin Xu Yuanyuan Li Jingbo Feng Chen Wang Yan Zhang Yukun Wang Xiuwen Cheng Yinyin Xu;Yuanyuan Li;Jingbo Feng;Chen Wang;Yan Zhang;Yukun Wang;Xiuwen Cheng

作者机构：Key Laboratory for Environmental Pollution Prediction and ControlCollege of Earth and Environmental SciencesLanzhou UniversityLanzhou 730000China Key Laboratory of Pollutant Chemistry and Environmental TreatmentCollege of Chemistry and Environmental ScienceYili Normal UniversityYining 835000China 

出 版 物：《Chinese Chemical Letters》 (中国化学快报（英文版）)

年 卷 期：2024年第35卷第4期

页      面：199-203页

核心收录：

学科分类：083002[工学-环境工程] 0830[工学-环境科学与工程（可授工学、理学、农学学位）] 081705[工学-工业催化] 08[工学] 0817[工学-化学工程与技术] 0703[理学-化学] 

基　　金：the Fundamental Research Funds for the Central Universities (No.lzujbky-2022-59) National Natural Science Foundation of China (No.51978319)。 

主　　题：Peroxymonosulfate Covalent organic framework Mn-metal organic framework Organic pollutant Degradation 

摘      要：A novel N, O modified Mn_(3)O_(4)@porous carbon catalyst(NOC-Mn_(3)O_(4)) was prepared by direct carbonization 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(Rh B). Benefiting from the N and O co-doping of COF, larger specific surface area, faster electron transfer and Mn cycling, the optimum 1NOC-Mn_(3)O_(4)could significantly improve the degradation performance of BPA and Rh B(92.1% and 96.9% within 30 min) as compared to C-Mn_(3)O_(4)without COF doping. In addition, 1NOC-Mn_(3)O_(4) showed good reusability and strong anti-interference ability. Radical quenching experiments, X-ray photoelectron spectroscopy(XPS), Electron paramagnetic resonance spectrometer(EPR) and electrochemical tests showed that the 1NOC-Mn_(3)O_(4)/PMS system degraded BPA and Rh B by both radical and non-radical pathways. Moreover, the possible degradation pathways of BPA and Rh B were proposed by liquid chromatography-mass spectrometry(LC-MS). Except for that, the toxicity of BPA, Rh B and their intermediates were evaluated. This study opens up a new prospect for the design of COF-doped PMS catalysts.