화학공학소재연구정보센터
홈 로그인 로그아웃 연락처 사이트맵
Journal of Industrial and Engineering Chemistry, Vol.101, 253-261, September, 2021
DOI10.1016/j.jiec.2021.06.007  Export Citation
Hierarchical Co3O4 decorated nitrogen-doped graphene oxide nanosheets for energy storage and gas sensing applications
Sivalingam Ramesh, K. Karuppasamy1, Dhanasekaran Vikraman1, Eunhyun Kim2, Lama Sanjeeb2, Young-Jun Lee2, Hyun-Seok Kim1, Joo-Hyung Kim2, †, and Heung Soo Kim†
  • Department of Mechanical, Robotics and Energy Engineering, Dongguk University-Seoul, Pildong-ro 1 gil, Jung-gu, Seoul 04620, Republic of Korea
  • 1Division of Electronics and Electrical Engineering, Dongguk University-Seoul, Pildong-ro 1 gil, Jung-gu, Seoul 04620, Republic of Korea
  • 2Department of Mechanical Engineering, Inha University, Inharo 100, Nam-gu, Incheon 22212, Republic of Korea
E-mail:,
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 ~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.
Keywords:Composite;Cobalt oxide;Graphene oxide;Nitrogen doping;Supercapacitors;Gas sensors
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