TiO2PSS自组装薄膜的光催化性能

331Vol.33,No.120041RAREMETALMATERIALSANDENGINEERINGJanuary20042002-06-20(59982002)1975,100083010-82317941E-mail:[e-mail]2/PSS1,22221.7300002.100083:TiO2/PSSUV-Vis-NIR(AFM)TiO2:TB43A1002-185X(2004)01-0063-04[1][1~5]LBG.Decher[6]LB[3~6]100%,[6~8]FujishimaHonda1972TiO2[9]TiO2TiO2TiO2PDDAPSSBTiO24ml20mlpH404h803070PDDA30minPSSpHPSS6433TiO21Lambda9UV-Vis-NIRNanoScopeaAFMPSS/TiO2PSS12cm254nm8W1h3h1hPSS4002hB5ml2mg/lB50mlB554nm1Fig.1Theprocesschartoffabricatingthinfilmsbyelectrostaticself-assemblymethodUv-vis2TiO2/PSS3190nm2TiO2/PSSFig.2OpticalabsorptionspectraofTiO2/PSSmultilayerthinfilms3190nmFig.3Dependenceofopticalabsorptionofmultilayerfilmsonthenumberofbilayersat190nm4002hAFM425nm3.21TiO2/PSS65[10,11]TiO2/PSS20-80nm5TiO2PSS1h1hPSS1hO2TiO2[11]4400AFMFig.4AFMimageofmultilayerthinfilmsafterprocessingat4005Fig.5OpticalabsorptionspectraofthemultilayerundertheUVirradiation14h24002hB6135minB78%52%2hXRD[12]6Fig.6ComparisonofphotocatalyticactivityofthemultilayerbydifferenttreatedmethodsTiO2/PSSUV-Vis-NIRAFM25nmTiO21hBReferences[1]ZhangLide(),MouJimei().Nano-materialsandNano-structure[M].Beijing:SciencePress,2001[2]KevinDHermanson,SimonOLumsdonetal.Dielectro-phoreticAssemblyofElectricallyFunctionalMicrowiresfromNanoparticleSuspensions[J].Science,2001,294:1082~1086[3]GeroDecher.FuzzyNanoassembiles:TowardLayeredPolymericMulticomposite[J].Science,1997,277:1232~1237[4]WuTao(),ZhangXi().Self-assembledUltrathinFilms-FromLayeredNanoarchitectuirestoFunctionalAssemblies[J].ChemicalJournalofChineseUniversity(),2001,22(6):1057~1065[5]PaulaTHammond.RecentExplorationinElectrostatic6633MutilayerThinFilmAssembly[J].CurrentOpinioninColloid&InterfaceScience,2000,4:430~442[6]DecherG,HongJD,SchmittJ.BuildupofUltrathinMultiplayerFilmsbyaSelf-assemblyProcess:ConnectivelyAlternatingAdsorptionofAnionicandCationicPolyeletrolytesonChargerSurface[J].ThinSolidFilms,1992,210/211:831~835[7]YanjingLiu,AprillyaRosidianetal.CharacterizationofElectrostaticallySelf-assembledNanocompositeThinFilms[J].SmartMaterStruct,1999,8:100~105[8]GeroDecher,WalterJDeressicketal.MetalNanoparticle/polymerSuperlatiticeFilms:FabricationandControlofLaerStructure[J].AdvMater,1997,9(1):61~65[9]FujishimaA,HondaK.ElectrochemicalPhotolysisofWaterataSemiconductorElectrode[J].Nature,1972,238:37~38[10]LegriniO,OliverosEetal.PotochemicalProcessesforWaterTreatem[J].ChemRev,1993,93:671~698[11]AmyLLinsebigler,GuanquanLuetal.PhotocatalysisonTiO2Surfaces:Principles,Mechanisms,andSelectedResults[J].ChemRev,1995,95:735~758[12]TianminWang,HuiyaoWangetal.TheEffectofProper-tiesofSemiconductorOxideThinFilmsonPhotocatalyt-icDecompositionofDyeingWasteWater[J].ThinSolidFilms,1998,334:103~108ThePhotocatalyticActivityofSelf-AssembledTiO2/PSSNanocompositeThinFilmHaoWeichang1,2PanFeng2WangTianmin2ZhengShukai2(1.LanzhouUniversity,Lanzhou730000,China)(2.BeijingUniversityofAeronauticsandAstronautics,Beijing100083,China)Abstract:Ordered-structuremultilayerthinfilmswerepreparedonquartzsubstratesbytheelectrostaticself-assemblymethod.TheUV-Vis-NIRspectrophotometerandtheatomicforcemicroscope(AFM)wereusedtocharacterizethefilms.TheresultsindicatedthatorderstructurenanoporousTiO2thinfilmsshowedhighphotocatalyticactivity,andthatthephotocatalyticactivityofheat-treatedthinfilmwashigherthanthatofUVirradiatedfilm.Keywords:electrostaticself-assemblymethod;titaniumdioxide;photocatalyticBiography:HaoWeichang,CandidateforPh.D.,CenterofMaterialsPhysicsandChemistry,BeijingUniversityofAstronauticsandAeronautics,Beijing100083,P.R.China,Tel:[phone],E-mail:[e-mail]