Formaldehyde(FA),as an important chemical raw material,has been widely used in many fields.How-ever,the discharge of a large amount of FA-containing wastewater poses a serious threat to the environ-ment and human health.Recently,the in-situ hydrogen energy release technology of hydrogen-containing stable liquid has been extensively explored due to its safe storage.Exploring a robust method to achieve FA removal and synchronous in-situ hydrogen release from FA containing wastewater is of great signif-icant for environmental protection and energy crisis alleviation.Here,we have innovatively introduced peroxymonosulfate(PMS)activation technology into FA removal and hydrogen production simultaneously.The composite of nitrogen doped carbon coating Co9S8 nanotubes(Co9S8@N-C)is employed as a proof of concept for FA decomposition and simultaneously hydrogen production based on PMS activation system.As expected,the Co9S8@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 concentration.The hydrogen yield reaches a value as high as 471 μmol within 60 min,corresponding to a FA degradation rate of 30％with an ini-tial 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(O2·-)and nonradical process dom-inated by singlet oxygen(1O2),which are induced by Co9S8@N-C/PMS system,are responsible for highly efficient hydrogen production via FA degradation.These generated O2·-and 1O2 can extract H from FA to form OOH intermediate,which can further combine with the H from water to produce hydrogen.This study provides an applicable technique for environmental purification and new energy development based on FA containing wastewater.

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

School of Resources and Environmental Engineering,Wuhan University of Technology,Wuhan 430070,China;School of Environmental Science and Engineering,Southern University of Science and Technology,Shenzhen 518055,China

材料科学技术（英文版）

[1]Caiyan Gao;Xuezhen Feng;Lian Yi;Xiaoyong Wu;Renji Zheng;Gaoke Zhang;Yubiao Li-.Peroxymonosulfate activation based on Co9S8@N-C:A new strategy for highly efficient hydrogen production and synchronous formaldehyde removal in wastewater)[J].材料科学技术（英文版）,2022(32):256-267

nonradical

Peroxymonosulfate,activation,Co9S8,new,strategy,highly,efficient,hydrogen,production,synchronous,formaldehyde,removal,wastewater,Formaldehyde,FA,important,chemical,raw,material,has,been,widely,used,many,fields,How,ever,discharge,large,amount,containing,poses,serious,threat,human,health,Recently,situ,energy,release,technology,stable,liquid,extensively,explored,due,its,safe,storage,Exploring,robust,method,achieve,from,great,signif,icant,environmental,protection,crisis,alleviation,Here,we,have,innovatively,introduced,peroxymonosulfate,PMS,into,simultaneously,composite,nitrogen,doped,carbon,coating,nanotubes,employed,proof,concept,decomposition,system,expected,presents,much,superior,efficiency,satisfactory,towards,than,those,common,photocatalysis,Fenton,reaction,basic,condition,range,concentration,yield,reaches,value,within,corresponding,degradation,tial,Characterizations,density,functional,theory,DFT,calculations,suggest,that,free,process,dominated,by,superoxide,singlet,oxygen,1O2,which,are,induced,responsible,These,generated,extract,OOH,intermediate,further,combine,produce,This,study,provides,applicable,technique,purification,development

0.535747