掺杂镧铈对纳米二氧化钛薄膜光催化性能的影响

200597EngineeringScienceSep.2005Vol17Supp.[]2005-07-10;2004-07-25[](1978-),,,,,,(,650093)[]-LaCeTiO2,,,,,[];TiO2;;;[]TB34[]A[]1009-1742(2005)-0440-0311972,FujishimaHondaTiO2,,Carey,[1]19851987,R.W.MattewsTiO2/UN34[2],CO2,,,TiO2,TiO2,,[3],,TiO2,,,[4]CeLa,-TiO2,2211TiO2,,,30min,,30min1203012012TiO2,Ce(SO4)24H2OLa2O3,,2mol1mol212202550%,TiO2-,,610mm/s;1002030minTiO2,,4,4,SX-10-12,200,4h213TiO2X-(D/max-2200XRD)214A=468nm,Ti0230mL40mg/L,1kW/m2(),4h,722:=(/),3311TiO2TiO2XRD11TiO2XRDFig11XRDspectrumofthreekindsofTiO2film1,TiO2,bca,TiO2,TiO2,,312TiO2TiO2(XRD)11TiO2Table1CrystalformandaverageparticlesizeofTiO2infilm//nmTiO22003115TiO22002518TiO220017171,TiO2,50nmLaCeTiO2,TiO2[5],,,1mTiO2,100ns,10nm10ps,,,,20nm,,,,,[6]313,200,4hTiO2,pH=2,20mg/L;22Fig12ThedegradationrateofMethylorange2TiO22,TiO2:(TiO2)(TiO2)(TiO2)TiO212h,99157%,TiO296112%,TiO281124%,1199%TiO2,TiO2TiO2144:TiO2,np,[7,8]43TiO2,:1),TiO22)TiO2TiO2TiO2TiO2[1]CareyJH,etal.Bullenvironcontam[J].Taxicol,1976,16:697[2]MattewsRW.Photo2oxidationoforganicmaterialinaqueoussuspensionoftitaniumdioxide[J].WaterRes,1986,20(5)1:569[3],,,.TiO2[J].,1998,10(4):349361[4],.[J].,2003,2:6061[5]AugugliaroV,etal.Influenceofhydrogenperoxideonthekineticsofphenolphotodegradationinsequeoustitaniumdioxidedispersion[J].ToxicEnvironChem,1989,16:89[6],,,.TiO2[J].(),2003,25(4):348351[7],,,.CeO2(TiO2[J].,1998,15(4):1720[8],,.TiO2[J].,2000,3(1):3335EffectofDopingLanthanumorCeriumonPhoto2catalyticPowerofNanometerTiO2FilmHouXiangyang,SunLijun,ZhangJinghui(SchoolofMaterial&MetallurgicalEngineering,KunmingUniversityofScience&Technology,Kunming650039,China)[Abstract]InthispaperstudynanometerTiO2filmsdopedwithrare2earthelementLaorCewerepreparedbysol2gelprocess,andphoto2catalyticdegradationtestswerecarriedout,withmethylorangebeingthedegradationobject,toinvestigatetheeffectofdopingonthephoto2catalyticdegradationpowerofthenanometerTiO2films.Theresultsobtainedshowthatofthetworare2earthelementsdoped,theeffectofLaisbetterthanthatofCe.Theresultsofthisstudyhaveprovidedareliablebasisforthepracticalapplicationofthistechnology.[Keywords]sunlight;TiO2film;doping;photo2catalyticdegradation;methylorange2447