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Synthesis and characterisation of cobalt oxide nanoparticles decorated graphene oxide and its electrocatalytic behaviour

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dc.contributor.author Usai, Vincent
dc.contributor.author Mugadza, Tawanda
dc.contributor.author Chigondo, Fidelis
dc.contributor.author Shumba, Munyaradzi
dc.contributor.author Nharingo, Tichaona
dc.contributor.author Moyo, Mambo
dc.contributor.author Tshuma, Piwai
dc.date.accessioned 2021-06-08T12:04:08Z
dc.date.available 2021-06-08T12:04:08Z
dc.date.issued 2019
dc.identifier.issn 0277-5387
dc.identifier.uri https://www.sciencedirect.com/science/article/abs/pii/S0277538718306387#!
dc.identifier.uri http://hdl.handle.net/11408/4412
dc.description.abstract Electrocatalytic behaviour of graphene oxide nanosheets (GONS) and cobalt oxide nanoparticles (Co3O4NPs) composite modified glassy carbon based sensor for 2,4 dichlorophenol (2,4 DCP) is investigated in this work. The GONS and Co3O4NPs were successfully synthesised and characterised by Fourier Transform Infrared Red (FTIR) spectroscopy, UV–Vis spectroscopy, Scanning Electron Microscopy (SEM), Transmission Electron Microscopy (TEM) and Energy Dispersive X-ray (EDX) spectroscopy, electrochemical impedance spectroscopy and cyclic voltammetry. The electrode surface area and surface coverage were 0.13 cm2 and 1.31 × 10−12 mol cm−2 respectively after modification with GONS/Co3O4NPs composite. The modified electrode had an electro-oxidation catalytic rate constant, k, of 3.6 × 106 M−1 s−1 and limit of detection of 3.5 × 10−7 M for the same test analyte. The electrode showed good reproducibility and an appreciably low oxidation potential (0.8 V) for 2,4-DCP. en_US
dc.language.iso en en_US
dc.publisher Elsevier Ltd en_US
dc.relation.ispartofseries Polyhedron;Vol.157 ; No.1 : p.192-199
dc.subject 2,4 dichlorophenol en_US
dc.subject Electrocatalysis en_US
dc.subject Cyclic voltammetry en_US
dc.subject Square wave voltammetry en_US
dc.subject Electrochemical impedance spectroscopy en_US
dc.title Synthesis and characterisation of cobalt oxide nanoparticles decorated graphene oxide and its electrocatalytic behaviour en_US
dc.type Article en_US


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