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1、ElectrochimicaActa121(2014)194–202ContentslistsavailableatScienceDirectElectrochimicaActajournalhomepage:www.elsevier.com/locate/electactaPhotoelectrochemicalPerformancesandPotentialApplicationsofTiO2NanotubeArraysModi?edwithAgandPtNanoparticlesGuangqing??Xu,HaipengLiu,JinwenWang,JunLv,Zh
2、ixiangZheng,YuchengWuLaboratoryofFunctionalNanomaterialsandDevices,SchoolofMaterialsScienceandEngineering,HefeiUniversityofTechnology,Hefei230009,ChinaarticleinfoabstractArticlehistory:TiOnanotube2arrays(NTAs)modi?edwithAg(Ag/TiO2)andPt(Pt/TiO2)nanoparticleswerefabricatedReceived4November
3、2013byanodicoxidationcombinedwithphotoreductionandhydrothermalmethods,respectively.Structures,ReceivedinrevisedformelementcomponentsandmorphologiesofTiO2,Ag/TiO2andPt/TiO2NTAsweremeasuredbyX-ray23December2013diffractiondiffractometer,X-rayphotoelectronspectroscopy,scanningelectronmicrosco
4、peandtrans-Accepted24December2013missionAvailableonline8January2014electronmicroscope.ThephotoeletrochemicalperformancesofTiO2,Pt/TiO2andAg/TiO2NTAswerecharacterizedbycyclicvoltammetryandamperometryinphosphatebuffersolutioninabsenceandpresenceKeywords:ofglucose.Modi?cationsofAgandPtnanopa
5、rticlesplaydifferentrolesinthephotoelectro-chemicalnanotubeprocessandhavedifferentpotentialapplications.AgnanoparticlesdecreasethephotocurrentTiO2arraysinbuffersolutionbutincreasethephotocurrentresponsetoorganiccompounds,whichis?tforelectro-Photoelectrochemicalsensorchemicaldetectionoforg
6、aniccompoundsduetothelowbackgroundphotocurrentandhighphotocurrentOrganiccompounddetectionresponse.Ag/TiONTAsachievethebestdetectionperformancewithsensitivityof0.152A/MandPtnanoparticles2Agnanoparticlesdetectionlimitof0.53M.Onthecontrary,PtnanoparticlescanenhancethephotocurrentofTiO2NTA
7、sinbuffersolutionbutdecreasethephotocurrentresponsetoorganiccompounds,whicharebene?tforphotocatalyticwatersplittingbutnotforphotoelectrochemicaldetection.?2014ElsevierLtd.Allrightsreserved.1.IntroductionandcouplingTiO2withnarrowbandgapsemiconductormaterials[11–13].S
