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1、上海交通大学硕士学位论文二氧化钛光子晶体的制备及其光催化性能的研究姓名：李军申请学位级别：硕士专业：材料学指导教师：赵斌元;胡晓斌20090101从实验结果来看，这种特殊结构对二氧化钛的光催化能力有一定程度的增强作用，其中的增强机理需要做进一步的实验对其进行深入分析。关键词：TiO2，锐钛矿，金红石型，光子晶体，光催化活性，薄膜ThepreparationandphotocatalyticactivityofTiO2photoniccrystalsABSTRACTNowadaysthewholewo
2、rldisfocusingonenvironmentalpollutionissues.RelativelycheapTiO2canremovethesepollutantsunderultra-violetradiation,withoutanypoisoningby-products;thusitisnowtakingonmoreandmoreattentions.However,photo-catalyzed/oxidizationtechnologystillhasmanyproblemsu
3、nsolvedinthepracticalrealization,forexample,theelectrons/vacuumsproducedbycatalyzedTiO2underlightareveryeasytorecombine,leadingtolowefficiencyandunderperformedphoto-canalizationeffect.Photoniccrystalisspecialmaterialwithoutstandingproperties,amongwhich
4、theinverse-opal’sphotoniccrystalstructurepossessesbetterspecificsurfaceareathannormalnanoTiO2,thankstoisporousstructure.Therefore,weexpecttofabricatethistypeofTiO2catalysts,ononehanditisphotoniccrystalstructured,ontheotherhand,thecrustaltypeshouldbeaco
5、mbinationofanataseandrutile.Thisstructurehas3advantagesincomparingtonano-TiO2:1.biggerspecificsurfacearea;2.biggerholevolume;3.itishetero-crystal.Bigspecificsurfaceareaisinfavoroftheabsorptionofmorereagentsonthesurfaceofcatalysts,andbigholevolumecanhel
6、ptoquicklydiffuseallreagentsandproductsduringthecatalyzingprocess,whichfacilitatesthequickerdecaysoftheorganic.Moreover,somestudiesshow,thecompoundingoftwosemi-conductorsortwophasesinonesemiconductoraregoodforreducingthespeedoftherecombinationofphoto-p
7、roducedelectronsandvacuums,thuspromotetheactivityofphoto-catalysts.Inthisprinciple,thecontentofthethesisistryingtoprepareTiO2catalystwithspecialstructure,andtotestwhetherthisspecialstructurecanimproveitscatalyticactivitybydoingthedecompositionexperimen
8、t.UsingPSasrawmaterialwesuccessfullypreparedcolloidalcrystaltemplateswithseveraldifferentPSradius,andinfiltratedtheTiO2precursorintothePScolloidalcrystalbysol-gelmethod,afteragingandthermaltreatment,theTiO2inverse-opalphotoniccrystalmat
