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单分散AuZnO纳米球的可控制备及气敏性能研究.docx

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单分散AuZnO纳米球的可控制备及气敏性能研究 Title:SynthesisandGas-SensingPropertiesofMonodispersedAuZnONanospheres Abstract: Inthisstudy,weaimedtosynthesizemonodispersedAuZnOnanospheresusingacontrollablemethodandinvestigatetheirgas-sensingproperties.TheAuZnOnanosphereswerepreparedthroughahydrothermalmethodfollowedbyareductionprocess.Themorphologyandstructureofthesynthesizednanosphereswerecharacterizedusingscanningelectronmicroscopy(SEM)andX-raydiffraction(XRD).Thegas-sensingpropertiesofthemonodispersedAuZnOnanosphereswereevaluatedbyconductingexperimentswithvarioustargetgases.OurresultsdemonstratethatthesynthesizedAuZnOnanospheresexhibitexcellentgas-sensingpropertiestowardsmultipletargetgases,makingthempromisingcandidatesforgassensingapplications. 1.Introduction Gassensorsplayacriticalroleinvariousfields,includingenvironmentalmonitoring,industrialsafety,andhealthcare.Amongthedifferenttypesofgassensors,metaloxidenanomaterialshaveattractedsignificantattentionduetotheirhighsensitivity,selectivity,andlowcost.Gold-zincoxide(AuZnO)nanocompositeshaveshowndistinctivegas-sensingproperties,astheycombinetheadvantagesofbothgoldnanoparticlesandzincoxide.However,thesynthesisofmonodispersedAuZnOnanosphereswithcontrollablesizesandshapesremainsachallenge. 2.ExperimentalMethodology 2.1SynthesisofMonodispersedAuZnONanospheres ThemonodispersedAuZnOnanosphereswerepreparedthroughatwo-stepsynthesisprocess.Firstly,zincnitrateandgoldchlorideweredissolvedinanappropriatesolvent,followedbytheadditionofareducingagentandasurfactant.Themixturewasthensubjectedtoahydrothermalprocessataspecifictemperatureandtime.Secondly,theresultingproductwasfurthertreatedbyareductionprocesstoobtainmonodispersedAuZnOnanospheres. 2.2CharacterizationTechniques ThemorphologyandsizedistributionofthesynthesizedAuZnOnanosphereswerecharacterizedusingscanningelectronmicroscopy(SEM).ThecrystalstructureandphasecompositionwereexaminedusingX-raydiffraction(XRD).Thepresenceanddistributionofgoldnanoparticlesonthesurfaceofthenanosphereswereanalyzedus