表面改性对含钛炉渣光催化性能的影响

:20091125:(307009);(2007CB613504);(N090423003):(1979-),,,,;(1954-),,,,第31卷第6期2010年6月东北大学学报(自然科学版)JournalofNortheasternUniversity(NaturalScience)Vol31,No.6Jun.2010雷雪飞1,薛向欣2,杨合2(1.,066004;2.,110004):,,,(SMTBBFS)X(XRD)(FTIR)(SEM)-(UVVis)(TG)SMTBBFS,;,;-Cr()SMTBBFS:25%,SMTBBFSCaTiO3/TiO2,:;CaTiO3/TiO2;;;:TQ032.41:A:10053026(2010)06083805EffectofSurfaceModificationonPhotocatalyticEffectofTitaniumBearingBlastFurnaceSlagLEIXuefei1,XUEXiangxin2,YANGHe2(1.NortheasternUniversityatQinhuangdao,Qinhuangdao066004,China;2.SchoolofMaterials&Metallurgy,NortheasternUniversity,Shenyang110004,China.Correspondent:LEIXuefei,Email:[e-mail])Abstract:WiththetitaniumbearingBFslagasstartingmaterial,thefeasibilitytoreduceCr()inaqueoussolutionwiththesurfacemodifiedtitaniumbearingblastfurnaceslag(SMTBBFS)usedasaphotocatalystwasinvestigated.ThephotocatalystwascharacterizedbyXraydiffraction(XRD),UVvisdiffusereflectancespectra,thermogravimetricanalysis(TG),Fouriertransforminfraredspectroscopy(FTIR)andscanningelectronicmicroscopy(SEM).ThephotocatalyticeffectsofdifferentSMTBBFScatalystswereevaluatedbythephotocatalyticreductionofCr()underUVvislightirradiation.ForthephotocatalyticreductionofCr(),thephotocatalyticeffectofSMTBBFScatalystisfoundtobestronglydependentonCaTiO3/TiO2ratio,adsorptioncapacityandsurfaceacidity,andtheoptimumH2SO4dopingproportionis25%.Keywords:surfacemodifiedtitaniumbearingblastfurnaceslag;CaTiO3/TiO2ratio;adsorptioncapacity;photocatalyticreduction;Cr(),:,TiO2,;[1-2],,,,,,,,[3],,:700!,6h,Cr()P25TiO288%,,,SMTBBFS,Cr(),SMTBBFS11.1();TiO2,,();();XD3X();Cr(VI)UV2550-(Shimadzu);PETGA7,;XPA4()1.2,TiO2,CaO,Al2O3,SiO2,MgO[2],2~31mm;(0,25%,5%,75%);;96h,,70!24h;,500!,2h;SMTBBFSx,xCr()1,,,/Cr()1Fig.1Schematicofphotocatalyticreactionsetup22.12SMTBBFSxXRD,,SMTBBFSx,(CaTiO3)-(TiO2)(SMTBBFS0)1SMTBBFSx2XRDFig.2XRDpatternsofcatalysts(a)∀SMTBBFS0;(b)∀SMTBBFS2.5;(c)∀SMTBBFS5;(d)∀SMTBBFS7.51SMTBBFSxTable1PhasecontentsinSMTBBFSxcatalystcalcinedatdifferentdopingratiosw()%w()%w(-)%w()%CaTiO3/TiO2STBBFS04052800STBBFS2.538509312.7STBBFS53949849.75STBBFS7.53157756.2839第6期雷雪飞等:表面改性对含钛炉渣光催化性能的影响,SMTBBFS7.5,;SMTBBFS2.5,SMTBBFS5,SMTBBFS7.5TiO2,CaTiO3/TiO2,SMTBBFSx,SMTBBFSxSEM[4],;,SMTBBFSx,;3,SMTBBFSx,SMTBBFSx,D50016~017m3SMTBBFSxFig.3ParticlesizedistributioninSMTBBFSxcatalyst2.2UVVis4SMTBBFSxUVVis,,SMTBBFSxSMTBBFS0SMTBBFS2.5SMTBBFS5SMTBBFS7.5;,SMTBBFSx4SMTBBFSx-Fig.4UVvisdiffusereflectionspectraofSMTBBFSxcatalyst:SMTBBFSx;,SMTBBFSx2.3TG5SMTBBFSxTG,,SMTBBFS2.5,SMTBBFS5,SMTBBFS7.5SMTBBFS015%~30%;100~150!,,,,,STBBFS5,STBBFS7.5,,,500!,SMTBBFS2.5,SMTBBFS5,SMTBBFS7.5,SMTBBFS0,,SO2-4[5];,SMTBBFS2.5,SMTBBFS5,SMTBBFS7.5SO2-4121%,184%,418%()5TGFig.5TGcurvesofcatalysts(a)∀SMTBBFS0;(b)∀SMTBBFS2.5;(c)∀SMTBBFS5;(d)∀SMTBBFS7.52.4SMTBBFSxCr()(C0-Ce)(C0-Ce)6Cr(),,,SMTBBFSxTBBFS(SMTBBFS7.5),25%,SMTBBFS2.5,840东北大学学报(自然科学版)第31卷5%,SMTBBFSx,,,[6],,25%6SMTBBFSxFig.6AdsorbabilitiesofSMTBBFSxcatalysts2.57Cr(),(0~25%),Cr();5%,Cr(),SMTBBFS0;SMTBBFS2.5,,9hCr()100%7Cr()Fig.7PhotocatalyticreductionefficiencyofCr()indifferentSMTBBFSphotocatalysts(CaTiO3/TiO2)[6]SMTBBFS0,,,SMTBBFSxSMTBBFS2.5CaTiO3/TiO2,,Cr()[7-8]5,100!,,;5%,SMTBBFSxSO2-4,[9]:,,,,Cr(),SMTBBFSx(CaTiO3/TiO2)8Cr()SMTBBFS2.5(EDS)8,SMTBBFS2.505%,Cr(),Cr(#)SMTBBFS2.58SMTBBFS2.5EDSFig.8EDSspectrumofSMTBBFS2.5afterphotocatalyticreaction31)XRD,SMTBBFSx,-2)TG,SO2-4(500!),SMTBBFSxSO2-4SMTBBFS2.5SMTBBFS5SMTBBFS7.53)SMTBBFSxSMTBBFS7.5SMTBBFS0SMTBBFS5SMTBBFS2.5,4)SMTBBFSx841第6期雷雪飞等:表面改性对含钛炉渣光催化性能的影响(CaTiO3/TiO2):[1],,,[J],2004,4(3):265-268(YangHe,XueXiangxin,ZuoLiang,etal.Photocatalyticdegradationofmethylenebluewithblastfurnaceslagcontainingtitanium[J].TheChineseJournalofProcessEngineering,2004,4(3):265-268.)[2]LeiXF,XueXX.PreparationofperovskitetypetitaniumbearingblastfurnaceslagphotocatalystdopedwithsulphateandinvestigationonreductionCr()usingUVVislight[J].MaterialsChemistryandPhysics,2008,112(3):928-933.[3]LeiXF,XueXX.Preparationandcharacterizationofperovskitetypetitaniabearingblastfurnaceslagphotocatalyst[J].MaterialsScienceinSemiconductorProcessing,2008,11(4):117-121.[4],,,Cr()[J]:,2009,30(2):221-225(XueXiangxin,LeiXuefei,YangHe,etal.PhotocatalyticreductionofCr()bysulfatemodifiedtitaniumbearingblastfurnaceslag[J].JournalofNortheasternUniversity:NaturalScience,2009,30(2):221-225.)[5]ColonG,SanchezEspanaJM,HidalgoMC.etal.EffectofTiO2acidicpretreatmentonthephotocatalyticpropertiesforphenoldegradation[J].JournalofPhotochemistryandPhotobiologyA:Chemistry,2006,179(1/2):20-27.[6]JiangD,XuY,WuD,etal.VisiblelightresponsivedyemodifiedTiO2photocatalyst[J].JournalofSolidStateChemistry,2008,181(3):593-602.[7]JiangF,ZhengZ,XuZY,etal.AqueousCr()photoreductioncatalyzedbyTiO2andsulfatedTiO2[J].JournalofHazardousMaterials:B,2006,134(1/2/3):94-103.[8]MohapatraP,SamantaraySK,ParidaK.Photocatalyticreductionofhexavalentchromiuminaqueoussolutionoversulphatemodifiedtitania[J].JournalofPhotochemistryandPhotobiologyA:Chemistry,2005,170(2):189-194.[9]UmebayashiT,YamakiT,ItohH.Bandgapnarrowingoftitaniumdioxidebysulfurdoping[J].Applied