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Photocatalytic investigations of TiO2–P25 nanocomposite thin films prepared by peroxotitanic acid modified sol–gel method.pdf

Photocatalytic investigations of TiO2–P25 nanocomposite thin films prepared by peroxotitanic acid modified sol–gel method.pdf

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时间：2019-03-04

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1、AppliedSurfaceScience311(2014)308–313ContentslistsavailableatScienceDirectAppliedSurfaceSciencejournalhomepage:www.elsevier.com/locate/apsuscPhotocatalyticinvestigationsofTiO2–P25nanocompositethinfilmspreparedbyperoxotitanicacidmodifiedsol–gelmethodFatemeha,bab,∗bOshan

2、i,RezaMarandi,SousanRasouli,MitraKeramatiFarhoudaDepartmentofEngineering,IslamicAzadUniversity,NorthBranch,Tehran,IranbDepartmentofNanomaterialsandNanotechnology,InstituteforColorScienceandTechnology,IranarticleinfoabstractArticlehistory:TiOthinfilmsandTiO–P2522nanoco

3、mpositethinfilmsweresynthesizedbysol–gelmethodutilizingReceived7August2013peroxotitanicacidsol(PTA).Filmswereobtainedbythreedipcoatingsofsolonborosilicateglasses.Receivedinrevisedform14April2014ThecrystallinesizeandthevariationinphaseofthinfilmsweredeterminedthroughX-r

4、aydiffraction.Accepted12May2014Theaveragecrystallinesizeofthefilmsthatwasintherangeof42nmshowedareductioninthevalueAvailableonline19May2014byincreasingtherutilecontent.ThesurfacemorphologyofthefilmshasbeencharacterizedutilizingScanningElectronMicroscopy(SEM),Transmissi

5、onElectronMicroscopy(TEM)andContact-modeatomicKeywords:forcemicroscopy(AFM).TheresultsofthemorphologicalinvestigationswerecompletelycoincidedwithP25theformationofTiO2–P25nanocomposite.TheopticalpropertyofthefilmshasbeenevaluatedbyDiffusePhotocatalyticperformanceReflect

6、ionSpectrophotometer(DRS)attheroomtemperature.TheobtainedUV–visspectraforbothTiO2PTAsolTiO2andTiO2–P25thinfilmshadsimilarmaximumwavelengths.ThebandgapvaluesforthedirectandindirectNanocompositetransitionshavebeenmeasuredfortheTiOandTiO–P25thinfilmsandtheresultsshowedthi

7、nfilms22negligiblevariations.ThephotocatalyticalactivityofthefilmswasstudiedbyphotodegradationofReactiveRed222(RR222)underUVirradiation.TheresultsshowedthatthephotocatalyticefficiencyofTiO2–P25nanocompositethinfilmshadenhancedbytheadditionofrutilephasewhichwasobviouslydu

8、etothecooperationofTiO2andP25nanoparticlesineffectivechargetransferprocess.Additionally,photodegradationrateconstantresultcalculati

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