Enhanced electrochemical property of SILAR-deposited Mn3O4 thin films decorated on graphene

Agnes C. Nkele; Ugochi Chime; Blessing Ezealigo; Assumpta Nwanya; AdaN.C. Agbogu; Azubike B.C. Ekwealor; Rose U. Osuji; Paul M. Ejikeme; Malik Maaza; Fabian Ezema

Journal of Materials Research and Technology (Jul 2020)

Enhanced electrochemical property of SILAR-deposited Mn3O4 thin films decorated on graphene

Agnes C. Nkele,
Ugochi Chime,
Blessing Ezealigo,
Assumpta Nwanya,
AdaN.C. Agbogu,
Azubike B.C. Ekwealor,
Rose U. Osuji,
Paul M. Ejikeme,
Malik Maaza,
Fabian Ezema

Affiliations

Agnes C. Nkele: Department of Physics and Astronomy, University of Nigeria, Nsukka, Nigeria
Ugochi Chime: Department of Physics and Astronomy, University of Nigeria, Nsukka, Nigeria
Blessing Ezealigo: Department of Physics and Astronomy, University of Nigeria, Nsukka, Nigeria
Assumpta Nwanya: Department of Physics and Astronomy, University of Nigeria, Nsukka, Nigeria; Nanosciences African Network (NANOAFNET) iThemba LABS-National Research Foundation, 1 Old Faure Road, Somerset West 7129,P.O. Box 722, Somerset West, Western Cape Province, South Africa; UNESCO-UNISA Africa Chair in Nanosciences/Nanotechnology, College of Graduate Studies, University of South Africa (UNISA), Muckleneuk Ridge, P. O. Box 329, Pretoria, South Africa
AdaN.C. Agbogu: Department of Physics and Astronomy, University of Nigeria, Nsukka, Nigeria
Azubike B.C. Ekwealor: Department of Physics and Astronomy, University of Nigeria, Nsukka, Nigeria
Rose U. Osuji: Department of Physics and Astronomy, University of Nigeria, Nsukka, Nigeria; Nanosciences African Network (NANOAFNET) iThemba LABS-National Research Foundation, 1 Old Faure Road, Somerset West 7129,P.O. Box 722, Somerset West, Western Cape Province, South Africa; UNESCO-UNISA Africa Chair in Nanosciences/Nanotechnology, College of Graduate Studies, University of South Africa (UNISA), Muckleneuk Ridge, P. O. Box 329, Pretoria, South Africa
Paul M. Ejikeme: Department of Pure and Industrial Chemistry, University of Nigeria, Nsukka, Nigeria
Malik Maaza: Nanosciences African Network (NANOAFNET) iThemba LABS-National Research Foundation, 1 Old Faure Road, Somerset West 7129,P.O. Box 722, Somerset West, Western Cape Province, South Africa; UNESCO-UNISA Africa Chair in Nanosciences/Nanotechnology, College of Graduate Studies, University of South Africa (UNISA), Muckleneuk Ridge, P. O. Box 329, Pretoria, South Africa
Fabian Ezema: Department of Physics and Astronomy, University of Nigeria, Nsukka, Nigeria; Nanosciences African Network (NANOAFNET) iThemba LABS-National Research Foundation, 1 Old Faure Road, Somerset West 7129,P.O. Box 722, Somerset West, Western Cape Province, South Africa; UNESCO-UNISA Africa Chair in Nanosciences/Nanotechnology, College of Graduate Studies, University of South Africa (UNISA), Muckleneuk Ridge, P. O. Box 329, Pretoria, South Africa; Corresponding author.

Journal volume & issue: Vol. 9, no. 4
pp. 9049 – 9058

Abstract

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Manganese oxide and manganese oxide decorated on graphene thin films were successfully synthesized and decorated on graphene via successive ionic layer adsorption and reaction (SILAR) method. The morphological, elemental, structural, optical and electrochemical properties of the deposited films were respectively studied using scanning electron microscopy (SEM), energy dispersive x-ray spectroscopy (EDX, or EDS), X-ray diffractometry (XRD), UV–vis spectrophotometry and a 3-electrode potentiostat. Decorating the manganese oxide film on graphene improved the morphological, structural, optical, and electrochemical features of the deposited films. SEM image revealed irregularly fused capsule-like nanoparticles, EDX spectra confirmed the elemental composition of the films while the structure of the film improved from amorphous to crystalline after decorating on graphene. Optical results showed improved the transmittance and optical band gap values of the films upon decoration on the graphene. Electrochemical studies showed good cyclic voltammograms and a recorded maximum specific capacitance value of 194 F g−1. The films find potential application in electrochemical storage devices and optical devices.

Published in Journal of Materials Research and Technology

ISSN: 2238-7854 (Print); 2214-0697 (Online)
Publisher: Elsevier
Country of publisher: Netherlands
LCC subjects: Technology: Mining engineering. Metallurgy
Website: https://www.journals.elsevier.com/journal-of-materials-research-and-technology/

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