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RESEARCH PRODUCT
Preparation of graphene nanocomposites from aqueous silver nitrate using graphene oxide’s peroxidase-like and carbocatalytic properties
Petri PapponenNitipon PuttaraksaAndreas JohanssonKunal GargLeona Gilbertsubject
Materials scienceScanning electron microscopeOxidelcsh:Medicine02 engineering and technology010402 general chemistry01 natural sciencesArticleCatalysisSilver nanoparticlelaw.inventionCatalysischemistry.chemical_compoundnanorakenteetlawgrafeeniChemical synthesislcsh:ScienceMultidisciplinaryNanocompositeGraphenelcsh:Rgrafeenioksidi021001 nanoscience & nanotechnology0104 chemical sciencesSilver nitratechemistryChemical engineeringkatalyysilcsh:QGrapheneCyclic voltammetry0210 nano-technologydescription
AbstractThe present study evaluates the role of graphene oxide’s (GO’s) peroxidase-like and inherent/carbocatalytic properties in oxidising silver nitrate (AgNO3) to create graphene nanocomposites with silver nanoparticles (GO/Ag nanocomposite). Activation of peroxidase-like catalytic function of GO required hydrogen peroxide (H2O2) and ammonia (NH3) in pH 4.0 disodium hydrogen phosphate (Na2HPO4). Carbocatalytic abilities of GO were triggered in pH 4.0 deionised distilled water (ddH2O). Transmission electron microscope (TEM), scanning electron microscope (SEM), cyclic voltammetry (CV) and UV-Vis spectroscopy aided in qualitatively and quantitatively assessing GO/Ag nanocomposites. TEM and SEM analysis demonstrated the successful use of GO’s peroxidase-like and carbocatalytic properties to produce GO/Ag nanocomposite. UV-Vis analysis indicated a higher yield in optical density values for GO/Ag nanocomposites created using GO’s carbocatalytic ability rather than its peroxidase-like counterpart. Additionally, CV demonstrated that GO/Ag nanocomposite fabricated here is a product of an irreversible electrochemical reaction. Our study outcomes show new opportunities for GO as a standalone catalyst in biosensing. We demonstrate a sustainable approach to obtain graphene nanocomposites exclusive of harmful chemicals or physical methods.
year | journal | country | edition | language |
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2020-03-01 |