微纳结构zno微球的合成及其光学性能分析-synthesis and optical properties analysis of zno microspheres with micro-nano structure.docx

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2018-08-07 发布于上海
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微纳结构zno微球的合成及其光学性能分析-synthesis and optical properties analysis of zno microspheres with micro-nano structure.docx

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微纳结构zno微球的合成及其光学性能分析-synthesis and optical properties analysis of zno microspheres with micro-nano structure

AbstractMicro-nanostructureZnOmicrospheresthatconsistofnanoZnOcrystalshasarelativelylargesurfaceareaandgoodopticalproperties,whichhavedrawnmuchattentionindye-sensitizedsolarcells,gassensors,photocatalysisandotherareas.Inthispaper,westudystudytheinfluenceofprocessparametersonmicrospheremorphology,structureandparticlesizedistributiontoachievecontrollablesynthesisofZnOmicrospheres,basedoncontrollablesynthesisofmicro-nanostructureZnOmicrosphereswestudytheimpactofirradiationandheattreatmentontheopticalpropertiesofZnOmicrospheres.Byusingsolvothermalmethodanddiethyleneglycol,zincacetatedihydrateasastartingmaterialsuccessfullysynthesizedmicro-nanostructureZnOmicrospheres.TheresultsrevealthattheoptimalprocessofsynthesisZnOmicrosphereis:theconcentrationofzincacetatedihydrate0.1mol/L,thereactiontemperatureisbetween160℃-180℃.Thisprocessresultsinmicro-nanostructureZnOmicrospherewithgoodsphericalmophologyandreasonableparticledistribution.Improvingtheheattreatmenttemperatureandtimewillchangemicrospheremorphology,afterheattreatmentnanoZnOparticlesofZnOmicrospheresfusedandgrownupintobiggersize.HeattreatmentinduceddefectsinZnOandcarbonizationoforganicmaterials,whichresultinginreflectancedecreasing,absorptionedgeredshifting.TheopticalpropertiesofZnOmicrospheresseriouslydegradatingafterprotonirradiation.ProtonirradiationcausepartVOturnintoVOwhichmaketheVOconcentrationincreased.TheopticalpropertiesdegradationinthevisibleregionofZnOisduetoelectronstransitionsfromthevalencebandtotheVO.Keywords:Micro-nanostructuredZnOmicrospheres,controllablesynthesis,opticalproperties,defects目录摘要..........................................................................................................................IABSTRACT................................................................................................................II第1章绪论...........................................................................................................11.1研究背景和意义.................................................