高效納米光催化材料的制備及其性能研究.pdf

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