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1、AppliedSurfaceScience313(2014)633–639ContentslistsavailableatScienceDirectAppliedSurfaceSciencejournalhomepage:www.elsevier.com/locate/apsuscEnhancedsolarwater-splittingperformanceofTiO2nanotubearraysannealingandquenchingbyZhangrongaaabHe,JianzhongXiao,FengXia,KojiKajiyoshi
2、,Chanatipca,∗Samart,HaiboZhangaSchoolofMaterialsScienceandEngineering,StateKeyLaboratoryofMaterialProcessingandDie&MouldTechnology,HuazhongUniversityofScienceandTechnology,Wuhan430074,PRChinabResearchLaboratoryofHydrothermalChemistry,FacultyofScience,KochiUniversity,Kochi78
3、0-8520,JapancGreenInnovativeChemistryResearchUnit,DepartmentofChemistry,ThammasatUniversity,Pathumthani12120,ThailandarticleinfoabstractArticlehistory:TiOnanotubearrayswerepreparedbyamodifiedtwo-stepanodization,andtheeffectsofanneal-2Received25April2014ingtemperatureandcooli
4、ngmannersonthephotoelectrochemicalwater-splittingperformanceofTiO2Receivedinrevisedform3June2014nanotubearrayswereinvestigated.TheresultsshowedthathigherannealingtemperatureandfasterAccepted5June2014cooling◦rateresultedinhighersolarconversionefficiency.TiO2nanotubearraysanne
5、aledat650CwithAvailableonline12June2014oilquenchingshowedmaximumsolarconversionefficiencyof1.75%undersimulatedsolarillumination.Thissuperiorphotoelectrochemicalwater-splittingperformancewasattributedtohighcrystallinitybyKeywords:elevatedannealingtemperature,pureanatasephasea
6、ndthinbarrierlayerduetooilquenching,aswellPhotoelectrochemicalwater-splittingasnanotubearraysthecarbondopingduringanodizationinorganicelectrolyte.TiO2©Annealing2014ElsevierB.V.Allrightsreserved.OilquenchingSolarconversionefficiencyVisiblelightabsorption1.IntroductionnanoTiO2
7、isexpectedtobeanexcellentcandidatebecauseitnotonlyoffersgreatspecificsurfaceareabutalsodecouplesthelightOneofthe“HolyGrails[1]”ofChemistryisH2fuelproductionabsorptionandcarrierstransportdirection.Duringthepastdecade,fromwater-splittingusingsolarenergy.ThissustainablemethodTi
8、O2nanotubearraysviaelectrochemicalanodizationofTiinflu-ofhydrogenproductionneedstoi