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1、MATERIALSCHARACTERIZATION66(2012)24–29Availableonlineatwww.sciencedirect.comwww.elsevier.com/locate/matcharFabricationandphotocatalyticpropertiesoffree-standingTiO2nanotubemembraneswiththrough-holemorphologyJianjunLiao,ShiweiLin⁎,NengqianPan,ShipuLi,XiankunCao,YangCaoKeyL
2、aboratoryofMinistryofEducationforApplicationTechnologyofChemicalMaterialsinHainanSuperiorResources,SchoolofMaterialsandChemicalEngineering,HainanUniversity,Haikou570228,P.R.ChinaARTICLEDATAABSTRACTArticlehistory:AnodicgrowthofTiO2nanotubeshasrecentlyattractedintensiveinte
3、rests.However,theReceived17October2011insulating,closedbarrierlayerhasrestrictedtheirfeasibilityfortheapplicationssuchasReceivedinrevisedformflow-throughphotocatalyticreactions,biofiltration,anddiffusioncontrolling.Inthepre-10January2012sentwork,wefabricatedfree-standingT
4、iO2membraneswiththrough-holemorphologyAccepted5February2012byelevatingtheanodizingvoltageattheendofanodizationprocess.Characterizationofthesampleswascarriedoutbymeansofscanningelectronmicroscope,X-raydiffractionKeywords:andthermogravimetry-differentialscanningcalorimetry.
5、TheexperimentalresultsshowTiO2thattheTiO2membranesstarttotransformfromamorphousphasetoanataseat300°C,Nanotubearrayandthephasetransformationfromanatasetorutilestartsat650°C.Inaddition,photocata-Through-holelyticdegradationofrhodamineBbytheTiO2membraneswithclosedbottomsando
6、penedPhotocatalyticpropertiesbottomshasalsobeensystematicallyinvestigated.AscomparedtoTiO2membraneswithclosedbottoms,TiO2membraneswithopenedbottomsexhibitedsuperiorphotocatalyticactivityduetoitsbetteraccessforrhodamineBmoleculesaswellastheenhancedlightharvestingandelectro
7、ncollectionefficiencies.©2012ElsevierInc.Allrightsreserved.1.IntroductionandtheunderlyingTisubstrate,wherearecombinationofelec-tronsandholescanoccur[5].AndthisleadstothereductionofHighlyorderedTiO2nanotube(TNT)arraysfabricatedbyelec-overallwater-splittingefficiency.ForDSS
8、Csapplication,thetrochemicalanodizationhaveattractedtremendousinterestopaqueTisubstrateprecludes
