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Issue 8, 2018
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Supercapacitor and photocatalytic performances of hydrothermally-derived Co3O4/CoO@carbon nanocomposite

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Abstract

Cobalt oxide (Co3O4/CoO) nanoparticle-embedded carbon matrix (Co3O4/CoO@carbon) was synthesized by pyrolysis of cobalt-salen complex ([Co(salen)]) followed by hydrothermal treatment. The X-ray diffraction, Raman and Fourier transform infra-red spectroscopies confirmed the presence of Co3O4/CoO in the carbon matrix. The scanning electron microscopy observation showed highly agglomerated spike-like grains. The TEM observation confirmed that the Co3O4/CoO grains were embedded in the carbon matrix. The supercapacitor studies conducted on the Co3O4/CoO@carbon matrix revealed a specific capacity of 324 C gāˆ’1 at 1 A gāˆ’1 in 1 M KOH. The Co3O4/CoO@carbon electrode also exhibited long-term life cycle with a high Coulombic efficiency of 96%. It is believed that the carbon present in Co3O4/CoO acted as a conductive nano-network, leading to such a high supercapacitor performance. The Co3O4/CoO@carbon material was also tested for its catalytic property, and it was found that the prepared material exhibited excellent photocatalytic degradation of azure A dye.

Graphical abstract: Supercapacitor and photocatalytic performances of hydrothermally-derived Co3O4/CoO@carbon nanocomposite

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Supplementary files

Article information


Submitted
27 Nov 2017
Accepted
07 Mar 2018
First published
08 Mar 2018

New J. Chem., 2018,42, 6114-6124
Article type
Paper

Supercapacitor and photocatalytic performances of hydrothermally-derived Co3O4/CoO@carbon nanocomposite

E. Duraisamy, H. T. Das, A. Selva Sharma and P. Elumalai, New J. Chem., 2018, 42, 6114
DOI: 10.1039/C7NJ04638C

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