固相合成钛酸钙的光催化性能

29520109ENVIRONMENTALCHEMISTRYVo.l29,No.5September20102009911.*(50874029),973(2007CB613504).**,Te:l02483687719;Emai:[e-mail]*韩冲杨合**薛向欣(,,110004)CaCO3TiO2,14002hCaTiO3.X(XRD)(SEM).,pHCaTiO3.,,,;CaTiO3;CaTiO3;CaTiO3,,CaTiO30.1g,CaTiO3,,.,,.,:,,[18].,.,.,[911].,.,;,pH.11.111CaCO3TiO2,,13,,10mm.,(6X2810),14002h,CaTiO3.X(XRD,DX2600),;(SEM,S3400N);(UVVis,UV2550PC).1.2,500W(365nm),,,100ml,,.,,/..q=C0-CtC0(1),C0;Ctt.832291.3,10mg!l-1,3h.,1h,12.34%,,.22.1114002hXRD,223.156∀33.060∀39.052∀40.966∀47.457∀59.274∀,(JCPDS000220153),TiO2CaO.14002hCaTiO3.2SEM,5m,,,.,,.,338nm,9266%,,338#577nm,50%.1XRDFig.1TheXRDdiagramofCaTiO32SEMFig.2TheSEMimageofCaTiO32.22.2.1,10mg!l-1,0.1g.3,,,.6h,50%.12.34%,.2.2.2pH10mg!l-1,0.1g,3h,pH2711.4,pH211,3h,pH11,35%.,,CaTiO3.pH.CaTiO3,H2TiO3,CaTiO3,,CaTiO3.,,,OH-H2O,.5:8333Fig.3Theeffectofilluminationtimeontheresultsofphotocatalyticdegradation4pHFig.4TheeffectofpHontheresultsofphotocatalyticdegradation2.2.3CaTiO30.1g,3h,pH11,151015mg!l-1.5.5,1mg!l-115mg!l-1,3h,1mg!l-17164%,15mg!l-117.94%.,CaTiO3.,;,,,,,,.2.2.41mg!l-1,3h,pH11,CaTiO36.6,CaTiO3,,005g51.13%0.4g71.53%.CaTiO30.1g,CaTiO3,,.,,,.,,,;,,.5Fig.5Theeffectofthemethyleneblueinitialconcentrationontheresultsofphotocatalyticdegradation6Fig.6TheeffectoftheCaTiO3dosageontheresultsofphotocatalyticdegradation834293(1)14002hCaTiO3,5m,,,577nm50%.(2),,;500W,,CaTiO3;,CaTiO3;CaTiO3,,CaTiO30.1g,CaTiO3,,.[1]LuCH,HuCY,WuCH.PreparationandcharacterizationofnewvisiblelightdrivenBaCo0.5Nb0.5O3photocatalystcharactersofperovskitetypeLaCoO3preparedbyreactivegrinding[J].MaterLett,2007,613959[2]HuangL,BassirM,KaliaguineS.CharactersofperovskitetypeLaCoO3preparedbyreactivegrinding[J].MaterChemPhys,2007,101259[3]LuXM,XieJM,ShuHM,eta.lMicrowaveassistedsynthesisofnanocrystallineYFeO3andstudyofitsphotoactivity[J].MaterSciEngB,2007,138289[4]HurSG,KimTW,HwangSJ,eta.lInfluencesofAandBsitecationsonthephysicochemicalpropertiesofperovskitestructuredA(In1/3Nb1/3B1/3)O3(A=Sr,Ba;B=Sn,Pb)photocatalysts[J].PhotochePhotobiolA,2006,183176[5]YangY,CaoZQ,JiangYS,eta.lPhotoinducedstructuraltransformationofSrFeO3andCa2Fe2O5duringphotodegradationofmethylorange[J].MaterialsScienceandEngineeringB,2006,132311314[6]YangY,JiangYS,WangYW,eta.lPhotoinduceddecompositionofBaFeO3duringphotodegradationofmethylorange[J].MolCatalA:Chem,2007,27056[7],,,.[J].,2006,248093[8],,,.[J].,2007,21(1)3336[9],,,.[J].,2004,30(9)1011[10],,,.[J],,2004,4(3)265268[11],,,.X3B[J].,2003,31(9)896899PHOTOCATALYTICPROPERTYOFTHESOLIDPHASESYNTHSIZEDTITANATECALCIUMHANChongYANGHeXUEXiangxin(SchoolofMaterials&Metallurgy,NortheasternUniversity,Shenyang,110004,China)ABSTRACTCaCO3andTiO2weresinteredat1400for2htoobtainCaTiO3.TheproducttreatedunderhightemperaturewascharacterizedbyXRDandSEM.Usingmethyleneblueasthedegradationtarge,ttheeffectofilluminationtime,pHvalue,initialconcentration,dosageonthephotocatalyticpropertyofCaTiO3wasstudied.Experimentalresultsshowedthatthedegradationrateofmethyleneblueincreased,butthedegradationrateofmethylenebluereducedwiththeilluminationtime;AlkalineconditionswereconducivetothephotocatalyticdegradationofmethylenebluebyCaTiO3;CaTiO3hadhighphotocatalyticdegradationrateforlowconcentrationmethyleneblue;thedegradationrateincreasedwiththedosageofCaTiO3,butthedegradationratewasalmostunchangedandevenreducingwiththedosageofCaTiO3whenitwasmorethan01g.Keywords:titanatecalcium,methyleneblue,photocatalysis.