Synthesis and characterisation of cobalt oxide nanoparticles decorated graphene oxide and its electrocatalytic behaviour
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 Trans...
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| Format: | Article |
| Language: | English |
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Elsevier Ltd
2021
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| Online Access: | https://www.sciencedirect.com/science/article/abs/pii/S0277538718306387#! http://hdl.handle.net/11408/4412 |
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| author | Usai, Vincent Mugadza, Tawanda Chigondo, Fidelis Shumba, Munyaradzi Nharingo, Tichaona Moyo, Mambo Tshuma, Piwai |
| author_facet | Usai, Vincent Mugadza, Tawanda Chigondo, Fidelis Shumba, Munyaradzi Nharingo, Tichaona Moyo, Mambo Tshuma, Piwai |
| author_sort | Usai, Vincent |
| collection | DSpace |
| description | 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. |
| format | Article |
| id | ir-11408-4412 |
| institution | My University |
| language | English |
| publishDate | 2021 |
| publisher | Elsevier Ltd |
| record_format | dspace |
| spelling | ir-11408-44122022-06-27T13:49:06Z Synthesis and characterisation of cobalt oxide nanoparticles decorated graphene oxide and its electrocatalytic behaviour Usai, Vincent Mugadza, Tawanda Chigondo, Fidelis Shumba, Munyaradzi Nharingo, Tichaona Moyo, Mambo Tshuma, Piwai 2,4 dichlorophenol Electrocatalysis Cyclic voltammetry Square wave voltammetry Electrochemical impedance spectroscopy 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. 2021-06-08T12:04:08Z 2021-06-08T12:04:08Z 2019 Article 0277-5387 https://www.sciencedirect.com/science/article/abs/pii/S0277538718306387#! http://hdl.handle.net/11408/4412 en Polyhedron;Vol.157 ; No.1 : p.192-199 open Elsevier Ltd |
| spellingShingle | 2,4 dichlorophenol Electrocatalysis Cyclic voltammetry Square wave voltammetry Electrochemical impedance spectroscopy Usai, Vincent Mugadza, Tawanda Chigondo, Fidelis Shumba, Munyaradzi Nharingo, Tichaona Moyo, Mambo Tshuma, Piwai Synthesis and characterisation of cobalt oxide nanoparticles decorated graphene oxide and its electrocatalytic behaviour |
| title | Synthesis and characterisation of cobalt oxide nanoparticles decorated graphene oxide and its electrocatalytic behaviour |
| title_full | Synthesis and characterisation of cobalt oxide nanoparticles decorated graphene oxide and its electrocatalytic behaviour |
| title_fullStr | Synthesis and characterisation of cobalt oxide nanoparticles decorated graphene oxide and its electrocatalytic behaviour |
| title_full_unstemmed | Synthesis and characterisation of cobalt oxide nanoparticles decorated graphene oxide and its electrocatalytic behaviour |
| title_short | Synthesis and characterisation of cobalt oxide nanoparticles decorated graphene oxide and its electrocatalytic behaviour |
| title_sort | synthesis and characterisation of cobalt oxide nanoparticles decorated graphene oxide and its electrocatalytic behaviour |
| topic | 2,4 dichlorophenol Electrocatalysis Cyclic voltammetry Square wave voltammetry Electrochemical impedance spectroscopy |
| url | https://www.sciencedirect.com/science/article/abs/pii/S0277538718306387#! http://hdl.handle.net/11408/4412 |
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