光催化技术在降解有机染料污染物方面的应用

综述崔玉民(,236032):光催化技术是一种新兴的高效节能现代污水处理技术,本文从半导体光催化技术研究现状反应机理反应动力学光催化技术发展及其存在的问题等方面对半导体光催化技术在降解常见有机染料方面的应用加以综述.:光催化技术;有机染料;光催化降解;二氧化钛:1000-3231(2004)06-0434-10:O64:AFujishima[1]1972TiO2,.,,.,.,[2].[3].1(TiO2)(Eg),(e-),,(h+).,,.[4],,TiO2,,TiO2,TiO2,O2O2,HOOOH.,OH:2004-05-24;:2004-06-24.:(No.2004kj303).:(1964-),,,,,.434226Vol.22No.6200411PhotographicScienceandPhotochemistryNov.,2004ArNNArNNArNO,ArNA,,(CO2H2ONO3-SO42-PO43-),TiO21[5]:1TiO2SchematicdiagramofphotocatalyticdegradationofpollutantsonTiO222.1,,[6]TiO2.,,,,pH:TiOH2+Pa1sTiOH+H+(1)TiOHPa2sTiO-+H+(2)TiOH2+TiOHTiO-.pH,,pH.(pHzpc)6.3,pHpHzpc,TiOH2+;pHpHzpc,TiO-.pH.[6],,SO3-TiO2TiOH2+.Zhao[7],TiO2,.SO3-,TiO2.,,SO3-TiO2.,SO3-TiO2TiOH2+.(pH=6),,,,TiO2,.6:435Langmuir,:Qeq-1=(QmaxKceq)-1+Qmax-1(3)Qeq-1,Qmax,K,ceq.2.2,(e-)(h+),OH,.Langmuir-Hinshewood[8]:r=-dc/dt=k1k2c/(1+k2c)(4)(4),r(mol/Lmin);c(mol/L);k1,TiO2(mol/min);k2(l/mol).1),k2c1,r=k1k2c=Kc(5),,[9].2)k1k2(4)1/r=1/k+(1/k1k2)1/c(6)cr,1/r1/c,k1k2.3)(t1/2)(4)t=(1/k1k2)ln(c/c0)+(1/k2)(c0-c)(7)c=1/2c0,(7)t1/2=ln2/(k1k2)+c0/2k2(8)(8):t1/2.2.3,().:=(dc/dt)/[d(h)inc/dt](9),;dc/dt(mol/Lmin);d(h)inc/dt(Einsteins/min).(4%),,,,.,20mg/L410mL,330450nm300W,10min,97.4%[10],.,,,.,.,,43622.3,TiO2,,.,,,..,,,,,.,,;,(TiO2)[11].Legrini[12].-.,TiO2[13].,,,,.[14]DDVP;[15].,,,.90TiO2.,TiO230nm10nm,45%.TiO2,TiO2,,(h+),TiO2TiO2.1.,[32],COD..,90min,100%,120min,COD753%.,.[33].,TiO2,,.,.,pH.,,.,pH,,.,,,,.8,6:4371ResearchprogressonphotocatalyticdegradationoforganicdyepollutantsPhotocatalystPhotocatalyticmethodTypesofreactorReactantofphotocatalyticdegradationLightReferenceTiO2WO3MethodofsuspendedphaseBeakerof100mLActivechlorineUltravioletlamp[16]TiO2MethodofsuspendedphaseQuartztesttubeofgroundmouthAlkalinedyesHigh-pressureHglamp[17]TiO2MethodofsuspendedphaseQuartztesttubeof50mLHypomethylblueHig-pressureHglampof300W[18]TiO2MethodofsuspendedphasePoolofphoto-catalyticdegradationDirectblueInfraredlamp[19]TiO2/MnO2MethodofsuspendedphaseTaperflaskof250mLDyeacid-redBanddyeacid-black234Sunlight[20]P-25TiO2MethodofsuspendedphaseReactionpoolofdiameter=90mmDyeacid-redBandcationblueX-GRLBlacklightlampof15W[21]TiO2/SiO2MethodofsuspendedphaseShallowReactionpoolofdiameter=90mmDyeacid-redBBlacklightlampof15W[22]TiO2/bentoniteMethodofsuspendedphaseCylindertypeofcasingreactorDyecationredGTLUltravioletlampof6W[23]TiO2/SiO2MethodofsuspendedphaseTaperflaskof150mLAcidscarletred3RIncandescentlamp[24]TiO2/zeoliteMethodofsuspendedphaseBeakerof100mLMethylorangeSunlight[25]TiO2/glasssliceMethodoffixedphaseTypeoffillerRose-redBHigh-pressureHglamp[26]TiO2MethodoffixedphaseAnopenfixed-bedphotoreactor4-(2-pyridinedia-zoyl)resorcinolMiddle-pressureHglamp[27]TiO2/SiO2/glasssliceMethodoffixedphaseFilm-platedglassphotoreactorMethylorangeUltraviolet[28]TiO2Methodofelectricalen-hancedphotocatalysisoffixedphaseFixed-bedphotore-actorReactivegaudyredUltravioletlampof16W[29]TiO2MethodoffixedphaseFixed-bedphotore-actorReactivegaudyredX-3BHigh-pressureHglampof250W[30]Fe3+-TiO2/SiO2MethodoffixedphaseFilm-platedglassphotoreactorRhodamineBXelampof500W[31],TiO2.TiO2,,,.1985[34]WO3,:,CO2H2ON2,COD.2001[4]COD,WO3CdSW,WO3/CdS/W,,43822,10h,COD69.8%71.0%,.[33],TiO2.250740nm,,,COD90%,.[35]H,:(1)H,,CdSTiO2,TiO2,;(2)pH,.pH=48,,;(3),..:TiO2.,,,Fe3+[36],Cr3+[37].Choi[38]21TiO2,0.5%Fe3+,Mo5+,Ru2+,Os2+,Re2+,V5+Rh2+,TiO2,,,.,.[21]6.6:CaCl20020.3mmol/L(2040%);MgCl20.020.3mmol/L(1020%);MnCl20.051mmol/L(30%);CuCl20.510mmol/L(90%);NiCl25100mmol/L(95%);AlCl30010.1mmol/L(50%).6P-25TiO2,Ca2+Mg2+Al3+;Cu2+Ni2+;Mn2+,.TiO2:(1),Ti4+,Ti4+,e-h+;(2),e-h+,;(3),,;(4),Ti3+..[39]SO42-TiO2,SO42-/TiO2,TiO2.[40]-SO42-/TiO2-SiO2,XPSIR,SO42-/TiO2-SiO2,SO,6:439Ti4+L;SO42-/TiO2-SiO2,H+B,,SO42-/TiO2-SiO2,,TiO2,,,SO42-/TiO2-SiO2.,TiO2[41].4,,,,,.:,.,,,,,.,,,.,,.:[1]HoffmannMR,MartinST,ChoiW,etal.Environmentalapplicationsofsemiconductorphotocatalysis[J].Chem.Rev.,1995,95:69.[2],.Rh3+/TiO2/SnO24-(2-)[J].,2003,21(3):161.CuiYM,FanSH.Synthesis,characterizationandapplicationofcomplexnanometerparticlesofRh3+/TiO2/SnO2inphotocatalyticdegradationofPAR[J].PhotographicScienceandPhotochemistry,2003,21(3):161.[3].TiO2[J].,2003,24(1):94.CuiYM.PhotocatalyticdegradationofpollutantsinriverbyTiO2[J].JournalofHenanUniversityofScienceandTechnology,2003,24(1):94.[4],,.WO3/CdS/W[J].,2001,21(2):9.CuiYM,ZhuYR,WangKZ.Astudyondeeptreatmentofprintinganddyeingwastewaterbyheterogeneousphoto-catalystWO3/CdS/W[J].IndustrialWaterTreatment,2001,21(2):9.[5].[J].,2002,20(4):253.CuiYM.Photocatalyticoxidationofnitrite[J].PhotographicScienceandPhotochemistry,2002,20(4):253.44022[6],,.[J].,2003,19(1):25.FanSH,SunZF,WuQZ.Adsorptionandphotocatalytickineticsofazodyes[J].ActaPhys.Chim.Sin.,2003,19(1):25.[7]LiuGM,LiXZ,ZhaoJC,etal.Mechanismofphotocatalyticdegradationofdyealizarin-redundervisiblelightradia-tion[J].J.Mol.Catal.A,2000,153:221.[8]MathensRW.Photocatalyticoxidationfortotalorganiccarbonanalysis[J].Anal.Chem.Acta,1990,23(6):3171.[9]Magrini.Improvingcatalystperformanceforthesolar-basedphotocatalyoxidationoforganics[J].SolarEngineering,1994,28(3):435.[10],.[J].,1