(Au,Ag,Cu)-BaTiO3復(fù)合薄膜的光吸收和光催化性能

(Au,Ag,Cu)-BaTiO3復(fù)合薄膜的光吸收和光催化性能摘要：

在本研究中，我們以溶膠凝膠法制備了(Au,Ag,Cu)/BaTiO3復(fù)合薄膜，研究了其光吸收和光催化性能。通過掃描電子顯微鏡（SEM）、X射線衍射（XRD）和紫外-可見（UV-Vis）分析等手段進行表征。結(jié)果表明，復(fù)合薄膜具有較好的晶體結(jié)構(gòu)和表面形貌，同時具有寬帶吸收和強光催化性能。進一步研究表明，復(fù)合薄膜中的(Au,Ag,Cu)納米粒子可以增強光吸收，提高光催化活性，其中多次制備(Au,Ag,Cu)/BaTiO3復(fù)合薄膜能夠提高其性能。最終，這項研究為設(shè)計和制備高性能光催化材料提供了有益的參考。

關(guān)鍵詞：復(fù)合薄膜、光吸收、光催化、(Au,Ag,Cu)、BaTiO3

Abstract:

Inthisstudy,(Au,Ag,Cu)/BaTiO3compositefilmswerepreparedbysol-gelmethodandtheiropticalabsorptionandphotocatalyticpropertieswereresearched.Thefilmswerecharacterizedbyscanningelectronmicroscope(SEM),X-raydiffraction(XRD)andultraviolet-visible(UV-Vis)analysis.Theresultsshowedthatthecompositefilmshadgoodcrystalstructureandsurfacemorphology,aswellaswidebandabsorptionandstrongphotocatalyticperformance.Furthermore,theresearchshowedthat(Au,Ag,Cu)nanoparticlesinthecompositefilmscouldenhanceopticalabsorptionandimprovephotocatalyticactivity.Andtheperformancecouldbeimprovedthroughmultiplepreparationof(Au,Ag,Cu)/BaTiO3compositefilms.Finally,thisstudyprovidedusefulreferenceforthedesignandpreparationofhigh-performancephotocatalyticmaterials.

Keywords:compositefilm,opticalabsorption,photocatalysis,(Au,Ag,Cu),BaTiOPhotocatalysisisapromisingtechnologyforenvironmentalremediationandenergyconversion,wheresemiconductormaterialsareusedtogeneratechargecarriersunderlightirradiationthatcanfacilitateredoxreactions.Amongvarioussemiconductormaterials,BaTiO3hasattractedsignificantattentionduetoitshighphotocatalyticactivityandstability.However,thephotocatalyticperformanceofBaTiO3islimitedbyitspooropticalabsorptionandelectron-holerecombinationrate.

ToenhancethephotocatalyticactivityofBaTiO3,researchershavedevelopedcompositefilmsbyincorporating(Au,Ag,Cu)nanoparticlesintoBaTiO3.The(Au,Ag,Cu)nanoparticlescanactaseffectiveelectronacceptors,promotechargeseparation,andreduceelectron-holerecombinationrate,leadingtoimprovedphotocatalyticperformance.Additionally,the(Au,Ag,Cu)nanoparticlescansignificantlyenhanceopticalabsorptionofthecompositefilmsandextendthelightabsorptionrange.

Theresearchfoundthatthephotocatalyticactivityofthecompositefilmscanbefurtherimprovedbymultiplepreparationcycles,whichcanoptimizethedistributionandsizeof(Au,Ag,Cu)nanoparticlesinBaTiO3.Furthermore,themorphologyofthecompositefilmscanbecontrolledbyadjustingthesynthesisconditions,suchastheprecursorconcentration,pH,andtemperature.

Overall,thedevelopmentof(Au,Ag,Cu)/BaTiO3compositefilmsprovidesanewwaytoenhancethephotocatalyticperformanceofBaTiO3andothersemiconductormaterials.Thepreparationofhigh-performancephotocatalyticmaterialscanhelpaddresstheurgentdemandforsustainableenergyandcleanenvironmentInadditiontophotocatalysis,(Au,Ag,Cu)/BaTiO3compositefilmshaveshownpromisingpropertiesforvariousotherapplications.

Firstly,thesecompositefilmscanbeusedaselectrocatalystsforoxygenreductionreaction(ORR).ORRisacrucialprocessinfuelcellsandmetal-airbatteries,whichsubstantiallyimpactstheirperformance.Inrecentyears,variousapproacheshavebeenproposedtoimproveORRcatalyticactivity,includingdopingwithtransitionmetals,surfacemodificationwithnoblemetals,andfabricationofhybridmaterials.(Au,Ag,Cu)/BaTiO3compositefilmscanofferanewoptionforORRelectrocatalysis,asthemetallicnanoparticlescanserveasactivesitesforcatalyticreactions,andBaTiO3canfunctionasasupportingmatrixtostabilizethenanoparticlesandfacilitateelectrontransfer.IthasbeenreportedthatAg/BaTiO3compositefilmsexhibitsuperiorORRactivitycomparedtopureBaTiO3andAgnanoparticlesduetothesynergisticeffectbetweenAgandBaTiO3.

Secondly,(Au,Ag,Cu)/BaTiO3compositefilmscanbeutilizedasgassensorsforenvironmentalmonitoringandindustrialprocesses.Theresistanceofsemiconductormaterialschangesuponexposuretotargetgases,whichcanbedetectedbyelectronicmeasurements.BaTiO3hasbeendemonstratedtoshowhighsensitivitytowardsvariousgases,suchasNH3,NO2,CO,andCH4.BydecoratingmetallicnanoparticlesonBaTiO3,thesensitivityandselectivityofgassensorscanbefurtherenhancedduetotheenhancedsurfaceareaandimprovedelectrontransfer.Forinstance,aAu/BaTiO3compositefilmwaspreparedviachemicalreductionandexhibitedexcellentsensitivitytowardsH2Sevenatlowconcentrations.

Thirdly,(Au,Ag,Cu)/BaTiO3compositefilmscanbeemployedasphotoelectrodesforsolarenergyconversion.Solarcellsgenerateelectricitybyconvertinglightintoelectricalenergy,andtheyrequireefficientphotoelectrodestoabsorbsunlightandgeneratechargecarriers.BaTiO3hasbeeninvestigatedasaphotoelectrodematerialduetoitswidebandgapandhighsurfacearea,butthephotoconversionefficiencyisstilllow.Theintegrationofmetallicnanoparticlescanincreasethevisiblelightabsorptionandprolongthelifetimeofphotogeneratedholes,resultinginenhancedphotoconversionefficiency.Forexample,aCu/BaTiO3compositefilmwaspreparedbyhydrolysisandexhibitedimprovedphotoconversionefficiencyundervisiblelightillumination.

Inconclusion,(Au,Ag,Cu)/BaTiO3compositefilmsaremultifunctionalmaterialswithgreatpotentialinvariousfields,includingphotocatalysis,electrocatalysis,gassensing,andsolarenergyconversion.TheincorporationofmetallicnanoparticlesintoBaTiO3canenhancethepropertiesofthecompositefilmsduetothesynergisticeffectbetweendifferentcomponents.Therationaldesignandfabricationof(Au,Ag,Cu)/BaTiO3compositefilmscanleadtotailoredmaterialswithdesiredpropertiesforspecificapplications.ThedevelopmentofsuchcompositefilmsnotonlycontributestofundamentalresearchbutalsoaddressespracticalchallengesinthefieldsofenergyandenvironmentThepotentialapplicationsof(Au,Ag,Cu)/BaTiO3compositefilmsarenumerous,particularlyinthefieldsofenergyandenvironment.Oneapplicationisinthedevelopmentofefficientsolarcells.Metallicnanoparticleshavebeenshowntoenhancethelightabsorptionofsolarcellsbyscatteringlightandincreasingthepathlengthofphotonswithintheactivelayer.IncorporatingthesemetallicnanoparticlesintoBaTiO3filmscanimprovetheabsorptionandconversionofsolarenergyintoelectricity,leadingtomoreefficientandcost-effectivesolarcells.

Anotherpotentialapplicationisinthedevelopmentofhigh-performingcatalystsforthereductionofairpollutants.Metallicnanoparticles,particularlythosecontainingcopper,havebeenshowntohaveexcellentcatalyticpropertiesfortheremovalofnitrogenoxidesandotherpollutantsfromexhaustgases.IncorporatingthesenanoparticlesintoBaTiO3filmscanenhancetheircatalyticpropertiesandleadtothedevelopmentofefficientanddurablecatalyststhatcanbeusedinvariousindustrialapplications.

Furthermore,(Au,Ag,Cu)/BaTiO3compositefilmscanalsobeusedinthedevelopmentofadvancedelectronicdevices,particularlyinthefieldofmicroelectronics.ThehighdielectricconstantofBaTiO3andtheexcellentconductivityofmetallicnanoparticlesmakethecompositefilmsexcellentcandidatesforthedevelopmentofhigh-performancecapacitors,resonators,andotherelectroniccomponents.Thesematerialscanalsobeusedinthedevelopmentofsensorsandactuators,withpotentialapplicationsinvariousfieldssuchashealthcare,environmentalmonitoring,