具有光增强芬顿活性的有序介孔Fe_TiO2的制备

ChineseJournalofCatalysis40(2019)631–637催化学报2019年第40卷第5期|www.cjcatal.orgavailableatwww.sciencedirect.comjournalhomepage:www.elsevier.com/locate/chnjcArticle(SpecialIssueonEnvironmentalandEnergyCatalysisforSustainableDevelopment)OrderedmesoporousFe/TiO2withlightenhancedphoto-FentonactivityZhenminXu†,RuZheng†,YaoChen,JianZhu,ZhenfengBian*KeyLaboratoryofResourceChemistry,MinistryofEducation,ShanghaiKeyLaboratoryofRareEarthFunctionalMaterials,ShanghaiNormalUniversity,Shanghai200234,ChinaARTICLEINFOABSTRACTArticlehistory:Received30December2018Accepted19January2019Published5May2019OrderedmesoporousFe/TiO2waspreparedbyanevaporation-inducedself-assemblymethod.TheironionswereinsituembeddedintheporewalloftheTiO2framework.Thecatalysthasexcellentlight-assistedFentoncatalyticperformanceunderUVandvisiblelightirradiation.X-raydiffractionandtransmissionelectronmicroscopyresultsshowedthattheTiO2sampleshaveanorderedtwo-dimensionalhexagonalporestructureandananatasephasestructurewithhighcrystallinity.TheorderedporestructureoftheTiO2photocatalystwithalargespecificsurfaceareaisbeneficialtomasstransferandlightharvesting.Furthermore,ironionscanbecontrolledbyembeddingthemintotheTiO2frameworktopreventironionlossandinactivation.Afterfivecycles,thereactionrateoftheorderedmesoporousFe/TiO2remainedunchanged,indicatingthatthematerialhasstableperformanceandbroadapplicationprospectsforthepurificationofenvironmentalpollutants.©2019,DalianInstituteofChemicalPhysics,ChineseAcademyofSciences.PublishedbyElsevierB.V.Allrightsreserved.Keywords:OrderedmesoporousTiO2IrondopingPhoto-FentonPhotocatalysis1.IntroductionThetraditionalFentonreactionisanadvancedoxidationtechnologyforwastewatertreatment[1,2].Itinvolvesthemix-tureofhydrogenperoxide(H2O2)andferrousiron(Fe2+)inacidicsolutiontoproducehydroxylradicals(•OH)fortheat-tackoforganicpollutants[3,4].However,theclassicalFentonreactionhastwoobviousshortcomings:lowactivityunderneutraloralkalineconditionsandsecondarypollutioncausedbyironsludge.Toovercometheseshort