掺Fe3纳米TiO2的制备及在造纸废水处理中的应用

中　国　造　纸　学　报　Vol.23,No.1,2008TransactionsofChinaPulpandPaper　:2007-03-25()　。　:,,1946;;、。E-mail:[e-mail]3+TiO2朱亦仁1　解恒参1,2　孟庆华1　张　弛2　李爱梅1(1.,,221116;2.,,221116)　:-TiO2Fe3+,-XRD(X),0.5%Fe3+TiO2600℃4h,;,pH5.0、1g/L、H2O20.5%()、300W5h,CODCr85%。TiO2。:TiO2;;Fe3+;:X793　　　　:A　　　　:1000-6842(2008)01-0043-05　　、,、、、,。[1],,。,、、,[2-3]。TiO2,,TiO2,,,。:、、、[4]。,Pd2+、Cu2+、Cr3+Tb3+、Th2+、La3+Ce3+[5-8],。-Fe3+TiO2,,。1　　1.1　:,,;,,;H2O2,,,30%。:SGY-1,;PHS-3,;TU1200,;X-PERTPROX,Philips。1.2　Fe3+TiO2[9]20.67mLTi(OC4H9)476.67mL(0.2954gFe(NO3)3·9H2O3mL15mL),0.4mL,2min,4.33mL,4～5min,5～6d,、、、Fe3+0.1%、0.3%、0.5%()TiO2。,3400℃、500℃、600℃4h9,。1.3　TiO2XRD(X),CuKa(λ=0.15418nm)X,60kV,55mA。-TiO2-43Fe3+TiO223　1,1∶1,,20～30min。1.4　,(pH)H2O2,,,300W(),,CODCr,。2　2.1　-2.1.1　Fe3+TiO2-Fe3+600℃4h,-,1。1　Fe3+TiO2-1,TiO2-:λa=257nm、λb=268nm、λc=262nm、λd=367nm,Fe3+TiO2;0.3%0.1%Fe3+TiO2,0.5%Fe3+TiO2110nm,2。0.5%Fe3+TiO2,。Choi、、TiO2,TiO2,TiO2。TiO2,TiO2。,,TiO2,TiO2,TiO2[10]。Fe3+,TiO2,。2.1.2　0.5%Fe3+TiO2-(0.5%Fe3+)-,2。2　TiO2-2,400℃,;600℃、,400℃100nm。;TiO2,(XRD),TiO2。-,600℃4h0.5%Fe3+TiO2。2.2　0.5%Fe3+TiO2XRD600℃4h0.5%Fe3+TiO2XRD,3。JCPDS(),-29.88nm,。58%,42%。3,[11]。,0.5%Fe3+TiO2,44　23　1Fe3+TiO23　0.5%Fe3+TiO2XRD,。4h0.5%Fe3+TiO2XRD,4。　　4JCPDS,550℃,800℃,600℃;TiO2600℃,0.5%Fe3+TiO2,Fe3+[12]。4　TiO2XRD,0.5%Fe3+TiO2600℃4h。2.3　Fe3+TiO22.3.1　TiO2Fe3+TiO22h,1。1,,Fe3+,,0.5%Fe3+TiO2。Fe3+TiO2,:①,-;②,,;③,,;④,Ti3+。,Fe3+TiO2,-,Fe3+,;Fe3+TiO2,,,。,TiO2[12-13]。1　TiO2/℃Fe3+/%CODCr/%400033.424000.140.004000.351.254000.570.00500035.355000.146.255000.362.505000.572.50600038.246000.147.506000.367.506000.573.75　　10mL,CODCr1940mg/L,pH5;1g/L;H2O22%()。45Fe3+TiO223　1,,,CODCr。,TiO2TiO2,,。2.3.2　0.5%Fe3+TiO20.5%Fe3+TiO25。　　　　1。5　Fe3+TiO25,,CODCr,5hCODCr(82.54%),,CODCr,5h。2.3.3　H2O2Fe3+TiO2H2O2,-,·OH,·OH,H2O2CODCr。,H2O2,·OH,CODCr。·OH,·OH(2·OH※H2O2)·OH,;H2O2,;,H2O2·OH[14],H2O2。H2O2,H2O20.5%,6。6　H2O20.5%Fe3+TiO26,H2O20.5%,5hCODCr291mg/L,85%,H2O22%。H2O2,H2O20.5%。3　　-TiO2Fe3+,TiO2-XRD,0.5%Fe3+TiO2600℃4h,;,;,,CODCr291mg/L,。　　　[1]　　,　.[J].,2005(2):24[2]　　,.TiO2[J].,2003,22(3):45[3]　,　,.[J].,2002,17(1):119[4]　,.TiO2[J].,2006,7(5):10[5]　,,,.(Ⅲ)TiO2[J].,2003,61(11):1813[6]　ZhangM,JinZS,WangSB,etal.ThephotocatalyticenhancementeffectofCOonPd/TiO2[J].ActaPhys-Chim.Sin.,2003,19(2):100[7]　,.Rh3+/TiO2/SnO2、4-(2-)[J].,2003,21(3):161[8]　,,,.TiO246　23　1Fe3+TiO2[J].,2004,12(2):14[9]　,　,,.TiO2Sol-Gel(Ⅰ)[J].,2000,11(6):933[10]　ChoiW,TerrainA,HoffmannMR,eta1.Roleofmetaliondopantsinquantum-sizedTiO2:Correlationbetweenphoto-reactivityandchargecarrierrecombinationdynamics[J].J.Phys.Chem.,1994,98(51):13669[11]　,,.[J].,2003,17(2):96[12]　,　,,.[J].,2003,20(1):73[13]　,　.[M].:,2006[14]　BalciogluIA,IndY.Photocatalyticdegradationoforganiccontami-nateinsemiconductorsuspensionswithaddedH2O2[J].Environ.Sci.Health,1996,18:123ThePreparationofNano-sizedTiO2DopedwithFe3+andItsApplicationintheTreatmentofPaper-makingWasteWaterZHUYi-ren1,＊　XIEHeng-shen1,2　MENGQing-hua1　ZHANGChi2　LIAi-mei1(1.DepartmentofChemistry,XuzhouNormalUniversity,Xuzhou,JiangsuProvince,221116;2.XuzhouInstituteofArchitectralTechnology,Xuzhou,JiangsuProvince,221116)(＊E-mail:[e-mail])Abstract:Nano-sizedTiO2wasdopedwithFe3+bysol-gelmethod.ByUV-VisiblespectroscopyandXRDanalysis,itisconcludedthatnano-sizedTiO2,whichwasdopedwith0.5%Fe3+andcalcinedfor4hrsat600℃,isamixtureofanataseandrutilecrystallineandshowsahighactivityinphoto-catalysis.Thismaterialwasusedasphoto-catalysttotreatpaper-makingwastewaterandtheinfluenceofcalcinationtemperatureanddopingamountonitsphoto-catalysisactivitywasdiscussed.ItwasfoundthatatpHvalue5.0,withacatalystamountof1g/L,hydroxylperoxideof0.5%(v/v),and5hrsradiationundera300Whigh-voltagemercurylamp,asatisfactoryresultoftreatmentcanbeachievedwithaCODremovalrateover85%.Keywords:nano-sizedTiO2;paper-makingwastewater;Fe3+doping;photo-catalysis(责任编辑:田风洲)47