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 

机构地区：[1]Key Laboratory for Environmental Pollution Prediction and Control,College of Earth and Environmental Sciences,Lanzhou University,Lanzhou 730000,China [2]Key Laboratory of Pollutant Chemistry and Environmental Treatment,College of Chemistry and Environmental Science,Yili Normal University,Yining 835000,China

出　　处：《Chinese Chemical Letters》2024年第4期199-203,共5页中国化学快报（英文版）

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

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.

关 键 词：PEROXYMONOSULFATE Covalent organic framework Mn-metal organic framework Organic pollutant DEGRADATION 

分 类 号：O643.36[理学—物理化学] X703[理学—化学]