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Co掺杂的TiO_2纳米管的光解水制氢性能研究.docx

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Co掺杂的TiO_2纳米管的光解水制氢性能研究 Title:StudyonthePhotocatalyticHydrogenProductionPerformanceofCo-DopedTiO2Nanostructures Abstract: Theurgentneedforcleanandsustainableenergysourceshasstimulatedextensiveresearchonphotocatalytichydrogenproduction.Titaniumdioxide(TiO2)isanexcellentphotocatalystduetoitswidebandgapandchemicalstability.However,itsphotocatalyticactivityislimitedbyitslargebandgapandfastrecombinationofphoto-generatedchargecarriers.DopingTiO2withtransitionmetalshasemergedasapromisingstrategytoenhanceitsphotocatalyticperformance.Amongvarioustransitionmetals,cobalt(Co)hasattractedsignificantattentionduetoitsuniqueelectronicstructureandfavorableenergylevelalignmentwithTiO2.Inthisstudy,Co-dopedTiO2nanoscalematerials,specificallyTiO2nanotubes,areinvestigatedfortheirpotentialinphotocatalytichydrogenproduction. Introduction: Thephotocatalyticproductionofhydrogenfromwatersplittinghasreceivedwidespreadattentionasacleanandsustainablemethodforhydrogengeneration.Titaniumdioxide(TiO2)hasbeenextensivelystudiedasaphotocatalystduetoitsabundance,lowcost,andenvironmentalfriendliness.However,thelargebandgapofTiO2limitsitsabsorptionofvisiblelight,resultinginalowphotocatalyticefficiency.Moreover,fastrecombinationofphoto-generatedelectron-holepairsfurtherreducestheoverallefficiency.Toaddresstheselimitations,variousstrategies,suchasdoping,havebeenexploredtoenhancethephotocatalyticactivityofTiO2.Cobalt(Co)dopinghasshownpromisingresults,asitcanmodifytheelectronicstructureandenergylevelsofTiO2,leadingtoimprovedabsorptionofvisiblelightandenhancedchargeseparationefficiency. Methods: TheCo-dopedTiO2nanotubeswerepreparedthroughahydrothermalsynthesismethod.ThedopingconcentrationofCowasvariedtoinvestigateitseffectonthephotocatalyticperformance.TheobtainednanotubeswerecharacterizedusingtechniquessuchasX-raydiffraction(XRD),scanningelectronmicroscopy(SEM),transmissionelectronmicroscopy(TEM),andUV-visiblespectroscopy.Thephotocatalytichydrogenproductionperformancewasassessedusingasetupthatconsistedofaxen