Peroxymonosulfate activation based on Co_(9)S_(8)@N-C:A new strategy for highly efficient hydrogen production and synchronous formaldehyde removal in wastewater

作     者：Caiyan Gao Xuezhen Feng Lian Yi Xiaoyong Wu Renji Zheng Gaoke Zhang Yubiao Li Caiyan Gao;Xuezhen Feng;Lian Yi;Xiaoyong Wu;Renji Zheng;Gaoke Zhang;Yubiao Li

作者机构：School of Resources and Environmental EngineeringWuhan University of TechnologyWuhan 430070China School of Environmental Science and EngineeringSouthern University of Science and TechnologyShenzhen 518055China 

出 版 物：《Journal of Materials Science & Technology》 (材料科学技术（英文版）)

年 卷 期：2022年第127卷第32期

页      面：256-267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）] 081702[工学-化学工艺] 08[工学] 0817[工学-化学工程与技术] 

基　　金：the National Natural Science Foundation of China(Nos.21975193 and 51602237) the Fundamental Research Funds for the Central Universities,China(WUT:2021Ⅲ034JC) 

主　　题：Peroxymonosulfate activation Co9S8@N–C Hydrogen evolution Formaldehyde removal 

摘      要：Formaldehyde(FA),as an important chemical raw material,has been widely used in many ***,the discharge of a large amount of FA-containing wastewater poses a serious threat to the environment and human ***,the in-situ hydrogen energy release technology of hydrogen-containing stable liquid has been extensively explored due to its safe *** a robust method to achieve FA removal and synchronous in-situ hydrogen release from FA containing wastewater is of great significant for environmental protection and energy crisis ***,we have innovatively introduced peroxymonosulfate(PMS)activation technology into FA removal and hydrogen production *** composite of nitrogen doped carbon coating Co_(9)S_(8)nanotubes(Co_(9)S_(8)@N-C)is employed as a proof of concept for FA decomposition and simultaneously hydrogen production based on PMS activation *** expected,the Co_(9)S_(8)@N-C/PMS system presents much superior hydrogen production efficiency and satisfactory FA removal rate towards FA wastewater than those of common catalysis,photocatalysis and Fenton reaction in the basic condition in a wide range of FA *** hydrogen yield reaches a value as high as 471μmol within 60 min,corresponding to a FA degradation rate of 30%with an initial FA concentration of 0.722 mol L^(-1).Characterizations and density functional theory(DFT)calculations suggest that the free radical process dominated by superoxide radical(O_(2)·^(-))and nonradical process dominated by singlet oxygen(^(1)O_(2)),which are induced by Co_(9)S_(8)@N-C/PMS system,are responsible for highly efficient hydrogen production via FA *** generated O_(2)·^(-)and ^(1)O_(2)can extract·H from FA to form·OOH intermediate,which can further combine with the·H from water to produce *** study provides an applicable technique for environmental purification and new energy development based on FA containing wastewater.