沸石负载TiO2光催化剂的制备及其性能研究

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: 1004-4639(2008)01-0014-05TiO2 , , (,110142) : 以钛酸四丁酯和乙醇为原料,采用溶胶-凝胶(sol-gel)法制备以天然沸石为载体的负载型TiO2光催化剂,并利用X射线衍射(XRD)和扫描电镜(SEM)等对其进行结构表征.通过自行设计的光催化反应器,考查溶胶-凝胶体系的组成、焙烧温度及焙烧时间等因素对光催化剂降解造纸废水性能的影响,同时讨论该催化剂的可重复利用性,确定制备天然沸石负载型二氧化钛光催化剂的最佳实验条件:无水乙醇与钛酸四丁酯的体积比为4.0,冰醋酸与钛酸四丁酯的体积比为0.1,水与钛酸四丁酯的体积比为0.15,硝酸与钛酸四丁酯的体积比为0.1,焙烧温度为300℃,焙烧时间为4h,造纸废水COD去除率可达81.93%.: ; ; ; : X703   : A: 2006-11-17: (20040284);(20063202): (1984-),,,,,.  ,,[1-3],.,、、、,,TiO2,、[4];TiO2,,.,,.,UV,TiO2,[5-7],TiO2.,sol-gelTiO2,,,TiO2.1 1.1 JB5374-91;DF-101S;101-2.(C.P.);(C.P.);(C.P.);.1.2 100,,,.105℃5h.30min.1.3 (2/3),30℃,.22 1       Vol.22 No.12008.3JOURNALOFSHENYANGINSTITUTEOFCHEMICALTECHNOLOGYMar.2008,,4h,1/3,.80℃,,,TiO2,,4h,TiO2.1.4 RigakuD/max-rBX(Cu Ka)X(XRD);JEOLJSM-6360LV(SEM).1.5 ,400W,.(COD1066.67mg/L,pH4.0),pH,,15min,,5min,.,[8](COD),.2 2.1 2.1.1 XRD1(a)TiO2(b-200℃,c-300℃,d-400℃,e-500℃)XRD.1 XRD  1,(22.05°、22.5°、36.45°)300℃,300℃,,.TiO2300℃TiO2,(25.40°);400℃,(27.6°),TiO2.2.1.2 SEM2(a)300℃TiO2(b).(a)(b)2 SEM  2TiO2,..TiO2300℃,,TiO2.XRD,.2.2 ,、TiO2COD3. 1           ,:TiO215   3 COD  3,TiO2300℃,COD,.300℃,TiO2,,COD.4.0h,COD,4.0h,300℃.2.3 30℃,0.1,0.15,0.1,/(),,300℃4h./()COD4.4 COD  4,COD.,,,,,,,;,/()4.0,,Ti9(OH)x(OBu)y,,,,,.,4.0,COD.,4.0.2.4 /()4.0,/(),COD5.5 COD  ,CH3COO-Ti,,.,COD.5/()0.1,.2.5 /()0.1,/(),COD6.  :/()0.1,COD,/()0.1,COD81.93%. 16                       20086 COD2.6 ,/()4.0,/()0.1,/()0.1mL,/(),COD7.7 COD  7,COD.,,(OR),(OH),,;,,TiO2,.:/()0.15,COD.2.7 TiO2,TiO2(300℃)4,300℃,,8.8   8,TiO21,TiO21.TiO2,,,TiO2TiO2,.8,TiO22、3、4,.TiO2,,TiO2,,;,TiO2,TiO2.3  -:4.0,0.1,0.15,0.1,300℃,4h,COD81.93%., 1           ,:TiO217   TiO24.:[1] .[J].,2002,2(2):183-185.[2] HagfeldtA,GratzelM.Light-InducedRedoxReac-tionsinNanocrystallineSystems[J].Chem.Rev.,1995,95(1):49-68.[3] ,,,.TiO2[J].,2006,6(1):108-113.[4] HiroshiY,TsukasaT.TitaniumDioxide/AdsorbentHybridPhotocatalystsofOrganicSubstancesofDiluteConcentration[J].CatalToday,2000(1):1-21.[5] ,,.TiO2[J].,2005,5(1):20-22.[6] ,,.TiO2[J].,2006(1):13-15.[7] ,,.TiO2[J].,2006,37(1):61-63.[8] ,,,.MnSO4COD[J].,2003,21(5):54-56.StudyonPreparationandPhotocatalysisPerformanceofTiO2PhotocatalystSupportedonNaturalZeoliteHUALi, YAOShu-hua, SHIZhong-liang(ShenyangInstituteofChemicalTechnology,Shenyang110142,China)Abstract: BasedontheTi(OC4H9)4andC2H5OHasreactionrawmaterials,photocatalystofTiO2thinfilmsupportedonnaturalzeolitewaspreparedbysol-gelmethod.TheexperimentaltechniquesofXRDandSEMwereusedtocharacterizethepreparedspecimens.Theinfluencesofcomponentsofsol-gelsys-tem,roastingtemperatureandtimeonthephotocatalyticdecomposabilityofTiO2thinfilmsupportedonnaturalzeoliteforpapermakingwastewaterwerestudied.ExperimentalconditionsofpreparationofTiO2thinfilmsupportedonnaturalzeolitehavebeendeterminedthroughexperiments.TheresultsshowedthatTiO2thinfilmsupportedonnaturalzeolitehasagoodphotocatalyticactivitytodegradepapermakingwastewaterKeywords: titaniumdioxide; naturalzeolite; supported; papermakingwastewater 18                       2008

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