Journal
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
Volume 101, Issue -, Pages 253-261Publisher
ELSEVIER SCIENCE INC
DOI: 10.1016/j.jiec.2021.06.007
Keywords
Composite; Cobalt oxide; Graphene oxide; Nitrogen doping; Supercapacitors; Gas sensors
Funding
- Basic Science Research Programme through the National Research Foundation of Korea [NRF-2020R1A2C1006613, NRF-2017R1D1A1B03028368]
- Institute of Civil Military Technology Cooperation development Project [18CMSS17]
- National Research Foundation of Korea [NRF-20M3A9E2063256, NRF-2019MD1A2103919, NRF 2019H1D8 A2107264]
- MOTIE (Ministry of Trade, Indus-try and Energy) in Korea, under the Fostering Global Talents forInnovative Growth Program [P0008750]
- National Research Foundation of Korea [4220200313627] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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A nano-sized cobalt oxide decorated nitrogen-doped graphene oxide (Co3O4@NGO) composite was synthesized for electrochemical supercapacitors and gas sensor applications, showing excellent specific capacitance and stability.
Nano-sized cobalt oxide decorated nitrogen-doped graphene oxide (Co3O4@NGO) composite was produced by a feasible and cost-effective hydrothermal route for electrochemical supercapacitors and gas sensor applications. The composite materials formation was ascertained by Raman spectroscopy, X-ray diffraction, and X-ray photo electron spectroscopy analyses. Field emission scanning electron microscopy (FE-SEM) and field emission transmission electron microscopy (FE-TEM) results explored the controlled nanoscale-sized sheet-like morphology for the prepared composite materials. Electrochemical storage properties were studied by cyclic voltammetry (CV), galvanostatic charge-discharge process (GCD), and electrochemical impedance spectroscopy analyses using three-electrode configuration with 3 M KOH electrolyte. The observed results showed similar to 466 F/g specific capacitance at a current density of 1 A/g for Co3O4@NGO composite structure with the capacity retention of 96 % after 5000 cycles. Further, the synthesized Co3O4@NGO composite revealed improved detection response, cyclability, and linearity for dimethyl methyl phosphonate vapor gas sensing. The synthesized composite also demonstrated excellent selectivity, stability, sensitivity, and rapid response time. (C) 2021 The Korean Society of Industrial and Engineering Chemistry. Published by Elsevier B.V. All rights reserved.
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