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1、AbstractAbstractLoadingacocatalystforhydrogenevolutionreactiononaphotocatalystcanlowertheoverpotentialofhydrogenevolution,effectivelypromotetheseparationofphotogeneratedelectronsandholes,andimprovetheefficiencyofphotocatalyticsystem.Thus,studiesonthecocatalysthaveattracte
2、dpeople'sattention.Inthispaper,MoS2ascocatalystmodifiedwithCdS/rGOanddye-sensitizationofMIL-125(Ti),thephotocatalyticpropertieswerestudied.Inthefirstpart,photodepositionofMoS2indifferentpHofTEOAaqueoussolutiononrGOx/CdS，whichwaspreparedbyasolvothermalmethod,preparedMoS2-C
3、dS/rGO-ytostudythephotocatalytichydrogenevolution.FollowedwiththecharacterizationsandtestssuchasX-raydiffractionanalysis，transmissionelectronmicroscopy，UV-Visdiffusereflectancespectroscopy，X-rayphotoelectronspectroscopy，infraredspectroscopy．Itwasfoundthatthehydrogenproduc
4、tionactivityofMoS2-CdS/rGO-11(photodepositionatpH=11)is4.3timesashighasMoS2-CdS/rGO-7(photodepositionatpH=7).AtlowpH7,MoS2depositsonthesurfaceoftheCdSparticlesofthecomposite.However,athighpH11,itloadsontheexposedrGO.WhenMoS2isontherGO,thetransferofthephotoexcitedelectronf
5、romCdStorGOiscompatiblewiththeHERatMoS2(synergiceffect),whereasthetransferisincompatiblewiththeHERwhenitisontheCdS(antisynergiceffect).Moreover,theMoS2depositedontheCdSdecreasesthephotoabsorptionofCdS,andtheeffectisavoidedwhenMoS2isontherGO.Inthesecondpart,MIL-125(Ti)wasprep
6、aredbyasolvothermalmethod,followedwiththecharacterizationsandtestssuchasUV-Visdiffusereflectancespectroscopy，X-raydiffractionanalysis，infraredspectroscopy．UsingTEOA(pH=7)aqueoussolutionaselectrondonors,andEYasasensitizedagent,thephotocatalytichydrogenevolutionwasstudied.W
7、henMoS2loadingmolarcontentis7%,thecatalysthasthehighestactivity(18μmol/h).WhenabsentofMoS2,thecatalysthasthealmostnoactivity.ThecauseforenhancedactivityisthatMoS2canpromotetheeffectiveseparationofphotoproducedelectronsandholes.Keywords：cocatalyst,MoS2,graphene,CdS,MIL-125
8、(Ti),hydrogenevoluationII目录目录第一章引言..............................................................
