CdS敏化TiO2半导体材料光催化废水处理研究

245Vol.24No.5200910JournalofTianzhongOct.20092009-05-110823004201201957~CdSTiO2121.4630002.463000-TiO2CdSTiO2CdS-TiO2CdS-TiO2CdSTiO2TiO2[1~2]TiO2TiO2n3.2eV25810cm-1387.5nm387.5nmTiO2TiO2TiO2TiO2TiO2TiO2[3~4]Vogel[5]CdSTiO2TiO2TiO2TiO2TiO2CdSTiO211.1Cd(NO3)2Na2S1799CODDKKCOD-60ACODUV-VisVarianCary1001.21.2.1TiO2-1:18:2:0.5TiO2pH1~2PVATiO260TiO2-TiO2450~500TiO21.2.2CdSTiO2TiO2Cd(NO3)21min3min6min9min0.1mol-1Na2S1min3min6min9minCdSTiO2bcdeCdSTiO2a1.2.310cm50100mlabcde5~6hO649A1006-5261(2009)05-0013-03CdSTiO214COD-22.1CdS-TiO22000mg-1CN-SCN-NO2-CdSTiO21TiO2nCdSnTiO2CdSTiO2CdSTiO21CdSTiO2CdS-TiO22CdS-TiO2VBCBVBh+CBe--h+e-[6]CdS-TiO2+hvCdS-TiO2+h+(VB)+e-(CB)2CdS-TiO2CBVBVBCBCdS-TiO2VBh+OH-OHRHCdS-TiO2CBOH+h(VB)OHH2O+h(VB)OH+H+RH+h(VB)RH+O22-2-H+OHHO2RHO2+e-(CB)2-22-+2OH+O2H2O2+e-(CB)OH+OH+O2RH+CO2+2O+xRHx-h+e-CBVB2.2CdS2.2.1CODabcdeCdS-TiO2COD11CdSTiO2COD(/mg-1)(%)a68.2015.52b57.5228.87c52.1835.55d46.8242.25e45.9343.361CdSTiO2TiO2TiO2-TiO2CdS2.42eV19728cm-1507nmTiO2CdSTiO2TiO2CdSCdSbcdCdSCdSTiO2CdSTiO22.2.2-abcdeCdS-TiO2UV-Vis33TiO2??CBVBh+e-Ox-OxRed+CO2RedTiO2e-h+hvCdSCdSTiO215CdSTiO2TiO2TiO2TiO2TiO2TiO2TiO2CdSTiO23CdS-TiO2UV-VisaCdSTiO2bCdS1minTiO2cCdS3minTiO2dCdS6minTiO2eCdS9minTiO2[1]FujishimaARaoTNTrykDATitaniumdioxidephotocatalysis[J]PhotoehemRev2000(1)1[2]LiXZLiFBStudyofAu/Au3+-TiO2photocatalysistowardvisiblephoto-oxidationforwaterandwastewatertreatment[J]EnvironSciTechnol200l35(11)238l[3]TiO2[J]200525(12)2065~2069[4]VogelRHoyerPWellerHQuantum-sizedPbS,CdS,Ag2S,Sb2S3andBi2S3particlesassensitizersforvariousnanoporouswide-bandgapsemiconductors[J]JPhysChe-m199498(12)3183[5]TiO2[J]200329(9)20StudiesonPhotocatalyticDegradationofSewageUsingCdSasSensitizerforNano-TitaniumDioxideFilmPANQing-cai1ZHANGQi-zhi2(1.HuanghuaiUniversity,ZhumadianHenan463000,China;2.ThermoelectricLimitedCompanyofZhumadianofStateElectricPower,ZhumadianHenan463000,China)Abstract:TheanodizedTiO2filmsweresynthesizedbyasol-gelmethodusingbutyltitanicacidasaprecursoronglasssheet.TheCdS-TiO2compositefilmswerepreparedbyamicroporesensitizemethodthatleadCdStoTiO2nanoparticlesurface.ThephotocatalyticdegradationeffectofwastewaterfromgasgenerationplantusingCdS-TiO2compositefilmswasstudied.ThephotocatalyticdegradationmechanicsofCdS-TiO2compositefilmstosewagewasdissected.ThecorrelationbetweencontentofCdStoTiO2semiconductormaterialandcompositefilmsphotocatalyticdegradationactivitywasascertained.Keywords:cadmiumsulfide;sensitize;titaniumdioxide;photocatalyticdegradation;sewagepollutant