Activation of sulfite by metal-organic framework-derived cobalt nanoparticles for organic pollutants removal

作     者：Xianjie Feng Deming Wu Xueyi Shen Yu Guo Yangyang Lv Aihua Xu Xiaoxia Li Xianjie Feng;Deming Wu;Xueyi Shen;Yu Guo;Yangyang Lv;Aihua Xu;Xiaoxia Li

作者机构：Hubei Key Laboratory of Biomass Fibers and Eco-dyeing and FinishingWuhan Textile UniversityWuhan 430200China School of Chemistry and Chemical EngineeringWuhan Textile UniversityWuhan 430200China School of Environmental EngineeringWuhan Textile UniversityWuhan 430200China 

出 版 物：《Journal of Environmental Sciences》 (环境科学学报（英文版）)

年 卷 期：2023年第124卷第2期

页      面：350-359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] 07[理学] 08[工学] 0817[工学-化学工程与技术] 09[农学] 0903[农学-农业资源与环境] 080502[工学-材料学] 0805[工学-材料科学与工程（可授工学、理学学位）] 0713[理学-生态学] 

基　　金：supported by the National Natural Science Foundation of China(No.51978542) Special Project of the Central Committee Guides Local Science and Technology Development of Hubei Province(No.2019ZYYD073) 

主　　题：Sulfite activation Co-MOF(Co^(2+)-based metal organic frameworks) Nitrogen-doped carbon Bicarbonate Sulfate radical 

摘      要：Sulfite(SO_(3)^(2−))activation is one of the most potential sulfate-radical-based advanced oxidation processes,and the catalysts with high efficiency and low-cost are greatly *** this study,the cobalt nanoparticles embedded in nitrogen-doped graphite layers(Co@NC),were used to activate SO32−for removal of Methyl Orange in aqueous *** Co@NC catalysts were synthesized via pyrolysis of Co^(2+)-based metal-organic framework(Co-MOF),where CoO was firstly formed at 400℃ and then partially reduced to Co nanoparticles embedded in carbon layers at 800℃.The Co@NC catalysts were more active than other cobaltbased catalysts such as Co^(2+),Co_(3)O_(4) and CoFe_(2)O_(4),due to the synergistic effect of metallic Co and CoxOy.A series of chain reaction between Co species and dissolved oxygen was established,with the production and transformation of SO_(3)•−,SO_(5)^(2−),and subsequent active radicals SO_(4)•−and HO•.In addition,HCO_(3)−was found to play a key role in the reaction by complexing with Co species on the surface of the *** results provide a new promising strategy by using the Co@NC catalyst for SO3_(2)−oxidation to promote organic pollutants degradation.