Facile synthesis of cobalt oxide/reduced graphene oxide composites for electrochemical capacitor and sensor applications

Thi Toan Nguyen, Van Hoa Nguyen, Ranjith Kumar Deivasigamani, Dian Kharismadewi, Yoshio Iwai, Jae Jin Shim

研究成果: ジャーナルへの寄稿記事

32 引用 (Scopus)

抄録

Reduced graphene oxide sheets decorated with cobalt oxide nanoparticles (Co3O4/rGO) were produced using a hydrothermal method without surfactants. Both the reduction of GO and the formation of Co3O4 nanoparticles occurred simultaneously under this condition. At the same current density of 0.5 A g-1, the Co3O4/rGO nanocomposites exhibited much a higher specific capacitance (545 F g-1) than that of bare Co3O4 (100 F g-1). On the other hand, for the detection of H2O2, the peak current of Co3O4/rGO was 4 times higher than that of Co3O4. Moreover, the resulting composite displayed a low detection limit of 0.62 μM and a high sensitivity of 28,500 μA mM-1cm-2 for the H2O2 sensor. These results suggest that the Co3O4/rGO nanocomposite is a promising material for both supercapacitor and non-enzymatic H2O2 sensor applications.

元の言語英語
ページ(範囲)71-77
ページ数7
ジャーナルSolid State Sciences
53
DOI
出版物ステータス出版済み - 3 1 2016

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cobalt oxides
Graphite
electrochemical capacitors
Oxides
Graphene
Cobalt
Nanocomposites
nanocomposites
graphene
Capacitors
Nanoparticles
nanoparticles
composite materials
oxides
sensors
Sensors
Composite materials
synthesis
Surface-Active Agents
Surface active agents

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics

これを引用

Facile synthesis of cobalt oxide/reduced graphene oxide composites for electrochemical capacitor and sensor applications. / Nguyen, Thi Toan; Nguyen, Van Hoa; Deivasigamani, Ranjith Kumar; Kharismadewi, Dian; Iwai, Yoshio; Shim, Jae Jin.

:: Solid State Sciences, 巻 53, 01.03.2016, p. 71-77.

研究成果: ジャーナルへの寄稿記事

Nguyen, Thi Toan ; Nguyen, Van Hoa ; Deivasigamani, Ranjith Kumar ; Kharismadewi, Dian ; Iwai, Yoshio ; Shim, Jae Jin. / Facile synthesis of cobalt oxide/reduced graphene oxide composites for electrochemical capacitor and sensor applications. :: Solid State Sciences. 2016 ; 巻 53. pp. 71-77.
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abstract = "Reduced graphene oxide sheets decorated with cobalt oxide nanoparticles (Co3O4/rGO) were produced using a hydrothermal method without surfactants. Both the reduction of GO and the formation of Co3O4 nanoparticles occurred simultaneously under this condition. At the same current density of 0.5 A g-1, the Co3O4/rGO nanocomposites exhibited much a higher specific capacitance (545 F g-1) than that of bare Co3O4 (100 F g-1). On the other hand, for the detection of H2O2, the peak current of Co3O4/rGO was 4 times higher than that of Co3O4. Moreover, the resulting composite displayed a low detection limit of 0.62 μM and a high sensitivity of 28,500 μA mM-1cm-2 for the H2O2 sensor. These results suggest that the Co3O4/rGO nanocomposite is a promising material for both supercapacitor and non-enzymatic H2O2 sensor applications.",
author = "Nguyen, {Thi Toan} and Nguyen, {Van Hoa} and Deivasigamani, {Ranjith Kumar} and Dian Kharismadewi and Yoshio Iwai and Shim, {Jae Jin}",
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AU - Nguyen, Thi Toan

AU - Nguyen, Van Hoa

AU - Deivasigamani, Ranjith Kumar

AU - Kharismadewi, Dian

AU - Iwai, Yoshio

AU - Shim, Jae Jin

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N2 - Reduced graphene oxide sheets decorated with cobalt oxide nanoparticles (Co3O4/rGO) were produced using a hydrothermal method without surfactants. Both the reduction of GO and the formation of Co3O4 nanoparticles occurred simultaneously under this condition. At the same current density of 0.5 A g-1, the Co3O4/rGO nanocomposites exhibited much a higher specific capacitance (545 F g-1) than that of bare Co3O4 (100 F g-1). On the other hand, for the detection of H2O2, the peak current of Co3O4/rGO was 4 times higher than that of Co3O4. Moreover, the resulting composite displayed a low detection limit of 0.62 μM and a high sensitivity of 28,500 μA mM-1cm-2 for the H2O2 sensor. These results suggest that the Co3O4/rGO nanocomposite is a promising material for both supercapacitor and non-enzymatic H2O2 sensor applications.

AB - Reduced graphene oxide sheets decorated with cobalt oxide nanoparticles (Co3O4/rGO) were produced using a hydrothermal method without surfactants. Both the reduction of GO and the formation of Co3O4 nanoparticles occurred simultaneously under this condition. At the same current density of 0.5 A g-1, the Co3O4/rGO nanocomposites exhibited much a higher specific capacitance (545 F g-1) than that of bare Co3O4 (100 F g-1). On the other hand, for the detection of H2O2, the peak current of Co3O4/rGO was 4 times higher than that of Co3O4. Moreover, the resulting composite displayed a low detection limit of 0.62 μM and a high sensitivity of 28,500 μA mM-1cm-2 for the H2O2 sensor. These results suggest that the Co3O4/rGO nanocomposite is a promising material for both supercapacitor and non-enzymatic H2O2 sensor applications.

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