Insight into the activation of peroxymonosulfate by N-doped copper-based carbon for efficient degradation of organic pollutants:Synergy of nonradicals  

作　　者：Mengmeng Ao Jian Wei Chuan-Shu He Heng Zhang Zhaokun Xiong Yonghui Song Bo Lai 

机构地区：[1]College of Environmental Sciences,Liaoning University,Shenyang 110036,China [2]State Key Laboratory of Hydraulics and Mountain River Engineering,College of Architecture and Environment,Sichuan University,Chengdu 610065,China [3]State Key Laboratory of Environmental Criteria and Risk Assessment,Chinese Research Academy of Environmental Sciences,Beijing 100012,China

出　　处：《Chinese Chemical Letters》2025年第1期513-520,共8页中国化学快报(英文版)

基　　金：the financial support from Sichuan Program of Science and Technology(No.2021ZDZX0012);the National Natural Science Foundation of China(No.52200105)。

摘　　要：The contamination of water resources by phenolic compounds(PCs)presents a significant environmental hazard,necessitating the development of novel materials and methodologies for effective mitigation.In this study,a metallic copper-doped zeolitic imidazolate framework was pyrolyzed and designated as CuNC-20 for the activation of peroxymonosulfate(PMS)to degrade phenol(PE).Cu-NC-20 could effectively address the issue of metal agglomeration while simultaneously diminishing copper dissolution during the activation of PMS reactions.The Cu-NC-20 catalyst exhibited a rapid degradation rate for PE across a broad pH range(3-9)and demonstrated high tolerance towards coexisting ions.According to scavenger experiments and electron paramagnetic resonance analysis,singlet oxygen(^(1)O_(2))and high-valent copperoxo(Cu(Ⅲ))were the predominant reactive oxygen species,indicating that the system was nonradicaldominated during the degradation process.The quantitative structure-activity relationship(QSAR)between the oxidation rate constants of various substituted phenols and Hammett constants was established.It indicated that the Cu-NC-20/PMS system had the optimal oxidation rate constant withσ^(-)correlation and exhibited a typical electrophilic reaction pattern.This study provides a comprehensive understanding of the heterogeneous activation process for the selective removal of phenolic compounds.

关 键 词：N-doped copper-based carbon Phenolic compounds PEROXYMONOSULFATE Nonradical pathway Quantitative structure-activity relationship(QSAR) 

分 类 号：O62[理学—有机化学]