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1、degradationofAcid-red3BdyecatalyzedbyTiO2nanotubes如MmofEnvironmentalSciencesVo1.18,No.4,PP.783—787,2006ISSN1o01—0742CN1l一2629/XArticleID:1001-0742(2006)04-0783-05CLCnumber:X788Documentcode:APhoto--degradationofAcid--red3BdyecatalyzedbyTiO2nanotubesJIANGFang,ZHENGShou
2、-rong,ZHENGZheng*,(StateKeyLaboratoryofPollutionControlandResourceReuse,Schoolofzzheng@nju.edu.cn)XUZhao-yi,WANGYan-jintheEnvironment,NanjingUniversity,Nanjing210093,China.E-mailAbstract:TiO2nanotubeprecursorwassynthesizedbythehydrothermalreactionofTiO2powderswithNaP
3、Hsolutionandthepropertiesofthenanotubematerialsweretunedusingdifferentposttreatments.Transmissionelectronmicroscopic(TEM)observationrevealedthatthenanotubeCOUldbeobtainedbyeitheradirectrinsewithacidsolutionorrinsewithdistilledwaterfollowedbyacidsolution.TheresultsofX
4、—raydiffraction(XRD)andinductivelycoupledplasma(ICP)analysisindicatedthatthenanotubematerialwascomposedofH2Ti205?}{20.Inaddition,thephotocatalyticactivitiesoftheresultingcatalystswerefoundtobestronglydependentonthepost—treatment.Theresultsofthephotocatalyticreactions
5、howedthatthedegradationofAcid—red3Bdyefittedpseudo—zero—orderkineticsandTiO,nanotubepreparedunderdirectrinsewithacidsolutionexhibitedahighercatalytice伍ciencycomparedtoothercatalysts.Keywords:TiO,nanotube;Acid.red3B;photocatalysis;hydrothermalreactionIntroductionAsone
6、kindofDovelfunctionalmateria1.TiO,nanotubehasbeenfoundpotentialapplicationsinsolareell(Barbeet..1997).semiconductordevice(Vinodgopalet01.,l993)andcatalystsupports(Idakievet01.,2005)etc.SinceKasugaet01.fl998)reportedthepreparationOfTiO,nanotubeusingahydrothermalmethod
7、inl998.specialattentionhasbeenrecentlypaidtotheexplorationofthepreparationmethods,formationmechanismandcompositionofTiO2nanotube(Bavykinet01.,2004;Chenet01.,2002;Yanget01.,2003;Wanget01.,2004;Yoshidaet01.,2005).However,thegeneralagrcementhasnotbeenreachedregardingthe
8、formationmechanismandstructuralcompositionofthisnovelmateria1.Kasugaet01.fl998.1999)concludedthatTi02nanotubeconsistedoftitaniumoxi
