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1、ElectrochimicaActa139(2014)331–336ContentslistsavailableatScienceDirectElectrochimicaActajournalhomepage:www.elsevier.com/locate/electactaPreparationofextremelysmoothandboron-fluorineco-dopedTiO2nanotubearrayswithenhancedphotoelectrochemicalandphotocataly
2、ticperformanceHui∗Li,JunhengXing,ZhengbinXia,JiangqiongChenSchoolofChemistryandChemicalEngineering,SouthChinaUniversityofTechnology,Guangzhou,Guangdong510641,ChinaarticleinfoabstractArticlehistory:HighlyorderedTiO2nanotubearrays(BF-TNTs)arepreparedbyanod
3、izationmethodintheuniqueReceived20April2014NHBFbasedelectrolyte.The44resultsshowthatthetubewallsoftheBF-TNTs,byfirstusingNH4BF4Receivedinrevisedform13June2014basedelectrolyte,aremuchsmootherthanthatofTiO2nanotubearrays(F-TNTs)fabricatedwithacon-Accepted30
4、June2014ventionalfluoridecontainingelectrolyte.IntheNH4BF4electrolyte,boronandfluorineelementsareonline17July2014AvailablesimultaneouslydopedintotheobtainedBF-TNTsduringtheanodizationprocess.TheBF-TNTsexhibitbetterphotoelectrochemical(PEC)propertiesandphot
5、ocatalytic(PC)performancethanthoseofF-TNTs.Keywords:TiO2nanotubearrays©2014ElsevierLtd.Allrightsreserved.ripple-freeboronandfluorinecodopingNH4BF4Photocatalyst1.IntroductionThegrowthofanodizingTNTsisusuallyaccomplishedusingflu-oridecontainingaqueous(denote
6、dasF-TNTs)[12,13]ororganicTiO2nanotubearrays(TNTs)preparedbyanodizationmethodinelectrolytes[14,15],andthemorphologiesofthetubes,whicharethefluoridecontainingelectrolytehasbeenextensivelystudiedandconsideredtobeacriticalfactoraffectingthepropertiesofF-appl
7、iedinphotocatalysts,solarcells,gassensors,andLi-batteriesTNTs,aredirectlydeterminedbytheelectrolytesystememployed.[1–4]duetothefactthattheycanprovidelargesurfaceareasandTheripplesfreeF-TNTs,whichpossessrelativelysmoothnessanddecreasebulkrecombinationofch
8、argecarriers[5].However,thehomogeneityoverthetubewalls,mayplayanimportantroleinwidespreadusageofTNTsispreventedbytheirwidebandgapreducingtherecombinationofphotogeneratedelectronsandholes(3.2eV),whichcausestheTNTsrespondonl
