掺杂硫酸盐对含钛高炉渣光催化性能的影响

*雷雪飞,薛向欣(,110004)采用高能球磨法,掺杂不同比例的硫酸铵,以攀钢含钛高炉废渣为原料,在400煅烧2h合成了具有钙钛矿型的硫酸盐掺杂的含钛高炉渣催化剂(Sulfatemodifiedtitaniumbearingblastfurnaceslag,STBBFS)用X射线衍射(XRD)傅里叶变换红外光谱(FTIR)扫描电子显微镜(SEM)紫外可见漫反射光谱(UVvis)和热重(TG)分析对STBBFS催化剂进行了表征,确定其具有钙钛矿结构,在紫外区域具有很强的光吸收能力不同硫酸铵掺杂量下,STBBFS催化剂的光催化活性由Cr()的还原率来评价,结果表明,硫酸铵掺杂量为5%时,STBBFS催化剂具有较高的光催化活性,500W中压汞灯照射8h,可将质量浓度为20mg/L的六价铬废水完全降解SO42-:TQ032.41:AEffectofSulfateonPhotocatalyticActivityofTitaniumbearingBlastFurnaceSlagLEIXuefei,XUEXiangxin(SchoolofMaterialsandMetallurgy,NortheasternUniversity,Shenyang110004)AbstractPerovskitetypesulfuricacidmodifiedtitaniumbearingblastfurnaceslag(STBBFS)photocatalystsarepreparedbythehighenergyballmillingmethodat400for2h.STBBFSphotocatalystsarecharacterizedbyXraydiffraction(XRD),Fouriertransforminfraredspectroscopy(FTIR),thermogravimetric(TG),UVvisabsorptionspectraandscanningelectronicmicroscopy(SEM)measurements.TheirphotocatalyticactivityischeckedthroughthephotocatalyticreductionofCr()asamodelcompoundunderUVvislightirradiation.TheresultsshowthattheSTBBFSphotocatalystshaveahigherphotocatalyticactivitywhentheoptimumadditionproportionofsulfateis5%;thepotocatalyticreductionefficiencyofCr()reaches100%after8h.Keywordssulfatemodifiedtitaniumbearingblastfurnaceslagcatalyst,concentrationofSO42-,photocatalyticreduction,Cr()*国家自然科学基金项目(50274025);教育部重大科技资助项目(307009);973计划项目(2007CB613504)雷雪飞:女,1979年生,博士研究生,主要从事废弃物资源化的研究Tel:02483687719Email:[e-mail]0(ABO3),,:,,[1!8],,,[9],,,,,,,STBBFS,,,,,,STBBFS,STBBFS11.1;TiO2(:TPN24P25,);(AR,);(AR,);ARLOptim∀XX(XRF)(SIDElemental);XD3X(XRD)(Shimadzu);SSX550(SEM)(Shimadzu);Nicolet380(FT#63#掺杂硫酸盐对含钛高炉渣光催化性能的影响/雷雪飞等IR)(Thermonicolet);Cr()UV2550(,Shimadzu);XPA4(,)1.2STBBFS((TiO2)∃15%),XRF,1(),2~31mm;,;96h,,400,2h,STBBFSx,x1Table1CompositionoftitaniumbearingblastfurnaceslagTiO2SiO2Al2O3%Ca%Mg%Fe%Mn19.2324.7413.6417.83.721.780.3991.3STBBFS,1500W,,,250.5g1000mL(20mg/L),,(25mL/min),,/,60min1,UV2550,=C0∀-CtC0∀&100%:C0∀;Ctt22.12.1.1XRD分析1STBBFSXRD,,STBBFS,(CaTiO3)(Ca(Mg,Al)(Si,Al)2O6)(Ca2(Mg0.5Al0.5)(Si1.5Al0.5O7))2STBBFS2,STBBFS5,2STBBFSxTable2PhasecontentinSTBBFSxcatalystCaTiO3/%/%/%STBBFS039538STBBFS2.539539STBBFS532608STBBFS7.5405281STBBFSXRDFig.1XRDpatternsofSTBBFScatalyst2.1.2FTIR分析2STBBFSFTIR2567cm-1;474cm-1974cm-11040cm-1;912cm-1;2360cm-1CO2[10],FTIRXRD,STBBFS2STBBFSFTIRFig.2FTIRspectraofSTBBFScatalyst2.1.3SEM分析3STBBFSSEM,(400),STBBFS,,,,2.1.4STBBFS催化剂的UVvis漫反射分析4STBBFSUVvis4,,STBBFS;STBBFS#64#材料导报:研究篇2009年1月(下)第23卷第1期2.1.5TG分析5STBBFSTG5,,STBBFS2.5STBBFS5STBBFS7.5STBBFS03.0%~5.0%;;,,[11],400,STBBFS2.5STBBFS5STBBFS7.5SO42-0.01%2.94%4.98%()STBBFS2.5SO42-05STBBFSTGFig.5TGcurvesofSTBBFScatalyst2.26Cr()6,(0%~5%),;7.5%,,STBBFS0;STBBFS5,,8hCr()100%6Cr()Fig.6ThephotocatalyticreductionefficiencyofCr()inthepresenceofdifferentphotocatalystsXRDFTIR,,STBBFS5,UVvis,,,STBBFS2.5STBBFS5STBBFS7.5TG,SO42-;(400),STBBFSxSO42-STBBFS2.5STBBFS5STBBFS7.5,STBBFS2.5SO42-06,STBBFS0STBBFS2.5STBBFS7.5STBBFS5,Jiang[12]TiO2TiO2,Cr(),(NH3TPD),SO42-TiO2,Noda[13],Cr(),,STBBFS2.5STBBFS0,400,STBBFS2.5SO42-0,STBBFS5:(1),STBBFS5;(2),SO42-TG,400,STBBFS2.5STBBFS5STBBFS7.5SO42-0.01%2.94%4.98%;6,#65#掺杂硫酸盐对含钛高炉渣光催化性能的影响/雷雪飞等STBBFS0STBBFS2.5STBBFS7.5STBBFS5,,SO42-,,,Cr()[14]7STBBFS57,573cm-1,459cm-1972cm-11100cm-1,876cm-1[10]STBBFS5(760cm-1949cm-11390cm-1),STBBFS,STBBFS,,7STBBFS5Fig.7FTIRspectrumofSTBBFS5catalystsafterexperiment3(1)STBBFS,4002hXRDFTIR,STBBFS,(2),,STBBFS2.5STBBFS5STBBFS7.5;STBBFS(3)TG,SO42-(400),STBBFSxSO42-STBBFS2.5STBBFS5STBBFS7.5(4)(STBBFS5),5%,,,8hCr()100%(5),SO42-,STBBFS,,1LuCH,HuCY,WuCH.PreparationandcharacterizationofnewvisiblelightdrivenBaCo0.5Nb0.5O3photocatalystcharactersofperovskitetypeLaCoO3preparedbyreactivegrinding[J].MaterLett,2007,61:39592HuangL,BassirM,KaliaguineS.CharactersofperovskitetypeLaCoO3preparedbyreactivegrinding[J].MaterChemPhys,2007,101:2593LuXM,XieJM,ShuHM,etal.MicrowaveassistedsynthesisofnanocrystallineYFeO3andstudyofitsphotoactivity[J].MaterSciEngB,2007,138:2894HurSG,KimTW,HwangSJ,etal.InfluencesofAandBsitecationsonthephysicochemicalpropertiesofperovskitestructuredA(In1/3Nb1/3B1/3)O3(A=Sr,Ba;B=Sn,Pb)photocatalysts[J].JPhotochePhotobiolA,2006,183:1765YangY,SunYB,iangYS,etal.PhotoinducedstructuraltransformationofSrFeO3andCa2Fe2O5duringphotodegradationofmethylorange[J].MaterChemPhys,2006,96:2346YangY,JiangYS,WangYW,etal.PhotoinduceddecompositionofBaFeO3duringphotodegradationofmethylorange[J].JMolCatalAChem,2007,270:567,,,.[J].,2006,24:808,,,.[J].,2007,21(1):339,.[J].,2006,18:77010,.[M].:,198211Col∀onG,S∀anchezespanaJM,HidalgoMC,etal.EffectofTiO2acidicpretreatmentonthephotocatalyticpropertiesforphenoldegradation[J].JPhotochemPhotobiolA,2006,179:2012JiangF,ZhengZ,XuZY,etal.AqueousCr()photoreductioncatalyzedbyTiO2andsulfatedTiO2[J].JHazardMaterB,2006,134:9413NodaLK,AlmeidaRM,GoncalvesNS.etal.TiO2withahighsulfatecontentthermogravimetricanalysis,determinationofacidsitesbyinfraredspectroscopyandcatalyticactivity[J].CatalToday,2003,85:6914UmebayashiT,YamakiT,ItohH.Bandgapnarrowingoftitaniumdioxidebysulfurdoping[J].ApplPhysLe