光催化剂降解有机污染物

21:21[1-2][3][4]volatileorganiccompoundVOC3%VOC1972FujishimaHonda[5]TiO2CO2H2O[6]Salthammer[7],,--TiO2TiO2TiO2XRDBETTEMTiO21.TiO2TiO2TiO2TiO2TiO2[8]1-1[9]TiO26644TiO2[10]TiO2Ti-O1.93710-10m1.96410-10mTiO2TiO2[11]TiO2[12][13-15]O2[16]ab1-1TiO22.TiO22.702.55lg450cm2510(n=2.4),,TiO2,,,,1.TiO2-(e-)(h+)H2OOH-OHO2-H+HO21-21-2[17]TiO2+hTiO2+h++e-h++e-H2OH++OH-h++OH-OHh++H2O+O2OH+H++O2-h++H2OOH+H+e-+O22-O2-+H+HO22HO22+H2O2HO2+H2O+e-2O2+OH-H2O2+e-OH+OH-(OH)(O2-)CO2H2OStafford[18]4-4-2.TiO2TiO2TiO21(Fermi)PtAgPt1982PtTiO22TiO2TiO2TiO2TiO2p-nFe3+20050:;44e/h;Ti3+;e/h3ZnOO2O2-ZnO(ns)H2O2LMCT[1]D.Uner,N.A.Tapan1,I.Ozen,M.Uner,Appl.Catal.A2003,251,225.[2]F.Donga,A.Suda,T.Tanabe,Y.Nagai,H.Sobukawa,H.Shinjoh,M.Sugiura,C.Descorme,D.Duprez,Catal.Today2004,90,223.[3]H.X.Lin,J.Mol.Catal.A1999,114,189.[4][J]1991,23()1-12.[5]FujishimaA,HondaK.Electrochemicalphotocatalysisofwateratasemiconductorelectrode[J].Nature,1972,238(5358):37-38.[6]FujishimaA,RaoTN,TrykDA.Titaniumdioxidephotocatalysis[J].J.Photochem.andPhotobi.C:Photochem.Rev.,2000,1(1):1-21.[7]AmamaPB,ItohK.PhotocatalyticoxidationoftrichloroethyleneinhumidifiedatmosphereJ.Mol.Catal.A:Chem.2001,176,165-172.[8]LiyiShi,ChunzhongLi,AipingChen,etal.MorphologicalstructureofnanometerTiO2-Al2O3compositepowderssynthesizedinhightemperaturegasmediumsreactor.ChemicalEngineeringJounal,2001,(84):405-411.[9],,.TiO2.,2001,46(4):256-273.[10]..,1997,3:31-33.[11],..,1991,5(5):14-18.[12],,.TiO2.,2001,(2):71-74.[13],..,2000,41(11),567-570.[14].TiO2,,1996(4):36-39.[15],.TiO2.,2001,46(4):265-273.[16]BicldeyRI,JayantyRKM,NavioJK,etal.Photo-oxidativefixationofmolecularnitrogenonTiO2(rutile)surfaces:thenatureoftheadsorbednitrogen-eontainingspecies.SurfaeeSeienee,1991,251:1052-1056.[17],.[M].:,2003.[18]NakamuraR,ImanishiA,MurakoshiK,etal.InsituFTIRstudiesofprimaryintermediatesofphotocatalyticreactionsonnanocrystallineTiO2filmsincontactwithaqueoussolutions[J].J.Am.Chem.Soc.,2003,125(24):7443-7450.