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锌铈共掺杂二氧化钛纳米材料制备与表征及其抗菌性能的研究(英文).docx

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锌铈共掺杂二氧化钛纳米材料制备与表征及其抗菌性能的研究(英文) Inrecentyears,nanomaterialshaveattractedalotofattentionduetotheiruniquephysicalandchemicalproperties.Amongthem,zinc-ceriumco-dopedtitaniumdioxide(Zn-Ce-TiO2)nanomaterialshaveshowngreatpotentialinvariousfieldsbecauseoftheirexcellentoptical,electrical,andbiologicalproperties.Inthispaper,wesynthesizedandcharacterizedZn-Ce-TiO2nanomaterialsandinvestigatedtheirantibacterialproperties. Firstly,Zn-Ce-TiO2nanomaterialsweresynthesizedusingasol-gelmethod.ThepreparedsampleswerethencharacterizedusingvarioustechniquessuchasX-raydiffraction,UV-Visspectrophotometry,scanningelectronmicroscopy,energydispersiveX-rayspectroscopy,andFouriertransforminfraredspectroscopy.TheresultsshowedthattheZn-Ce-TiO2nanomaterialshadacrystallineanatasestructure,andtheZnandCeatomsweresuccessfullydopedintotheTiO2lattice. Next,theantibacterialpropertiesoftheZn-Ce-TiO2nanomaterialswereevaluatedagainstEscherichiacoli(E.coli)andStaphylococcusaureus(S.aureus)bacteria.ThebacteriawereexposedtotheZn-Ce-TiO2nanomaterialsandtheantibacterialactivitywasdeterminedusingthediskdiffusionmethodandminimuminhibitoryconcentration(MIC)assay.TheresultsshowedthattheZn-Ce-TiO2nanomaterialsexhibitedexcellentantibacterialactivityagainstbothE.coliandS.aureusbacteria.TheMICvalueswerefoundtobeintherangeof25-50μg/mL,suggestingthattheZn-Ce-TiO2nanomaterialscouldbeusedasapotentialantibacterialagent. Furthermore,themechanismoftheantibacterialactivityoftheZn-Ce-TiO2nanomaterialswasalsoinvestigated.Reactiveoxygenspecies(ROS)weregeneratedbytheZn-Ce-TiO2nanomaterialsunderlightirradiation,whichdamagedthecellmembraneandcausedcelldeath.TheresultsofthebacterialmembranepermeabilityassayalsosupportedthedamagetothebacterialcellmembranecausedbytheZn-Ce-TiO2nanomaterials. Inconclusion,Zn-Ce-TiO2nanomaterialsweresynthesizedsuccessfullyusingasol-gelmethodandtheirstructural,optical,andchemicalpropertieswerecharacterized.TheresultsshowedthattheZn-Ce-TiO2nanomaterialsexhibitedexcellentantibacterialactivityagainstbothE.col