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1、東北師范大學(xué)碩士學(xué)位論文高效納米光催化材料的制備及其性能研究姓名:于小丹申請學(xué)位級別:碩士專業(yè):分析化學(xué)指導(dǎo)教師:郭伊荇20050501AbstractEnvironmentalpollutionhasbecomeaseriousandglobalproblemwiththedevelopmentofindustryPhotocatalyticredoxreactionsusedindegradingpollutionorganicsh

2、avegainedwideinterestbecauseoftheirsimplicities,economicadvantagesandwithoutthesecondpollutionThelightsourceoftenusedinAOP(AOP2AdvancedOridationProcess)isUVlightbutresearchersareinterestedinthesolarorvisiblelightinrecent

3、yearsowingtoUVlightisexpensiveanddifficulttOachieveToimprovethephotoefficiencyofthephotocatalyticmaterials,manyresearchgroupshavefocusedtheirattentiononpreparationofthenanometerphotocatalystsandimprovetheactivityofphotca

4、talystsThefirstnanocompositecatalystthatwepreparedistheZnS/Ti02,whereZnSinthecubicphasewashomogeneouslydistributedintotheanataseTi02crystallatticeviamicroemulsionandtemperature—programmedsolvothermaltreatmentr200oC2oC/ra

5、in)TheresultingZnS/Ti02nanocomposites,inaZnSdopinglevelat21,107,and199%,respectivelywerecube—shapedwiththeparticlesizesaslargeaslOto15amThestructuresandphysicochemicalpropertiesofthecompositeswerecharacterizedbypowderX—r

6、aydiffraction(XRD),Ramanscatteringstudies,UVdiffusereflectancespectroscopy(UV/DRS),photoluminescence(PL)spectroscopy,andtransmissionelectronmicroscopy(TEM)Theirvisiblelightphotocatalyticactivitywastestedviaphotodegradati

7、onofanorganophosphotospesticide,parathion—methyl(MPT)ItwasfoundthatintroductionofZnSintotheanataseTi02crystallaaicewasprofitabletotheenhancementofPLintensityorphotocatalyticactivityoftheanataseTi02duetochemicalinteractio

8、nwithinthecompositesand/orthestrongadsorptionoftheMPTmoleculeonthesurfaceoftheZnS/Ti02compositesAs—preparedsecondnanocompositecalalystWaSnanosizedternarysulfideCdIn2S4,whichisanovelandefficientphotocatalystanditWaSsimply

9、preparedbyatemperatureprogrammedhydrothermalmethodComparedwiththechemicattransportmethod,aconditionofOurmethodforpreparationofCdln2S4ismildThestructuresandphysicochemicalpropertiesofthecompositeswerecharacterizedbyXRDUV/

10、DRS,andTEMTheproducthadananometersize(averageparticlesize13rml)andstrongabsorptionintherangeof200to58012hi,andthevisible—lightphotoactivityofCdln2S4WaStestedviadegradationofanaqueousmethylorangeandcomparedwithCdSItCanbeS

11、eenthatCdlD2S4exhibitedmuchhi【ghervisible—lightphotocatalyticactivityThephotocatalyticactivityofCdln2S4ismainlyduetoitsintenseabsorptioninvisible—lightanditsphoto—stabilityishigherthanCdSKeywords:ZnS/Ti02;ternarysulfide;

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