کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1504094 | 1510969 | 2016 | 7 صفحه PDF | دانلود رایگان |
• Co3O4 anchored onto reduced graphene oxide via hydrothermal method.
• The composite showed a low detection limit of 0.62 μM for the H2O2 sensor.
• The composite exhibited a high specific capacitance of 545 F g−1 at 0.5 A g−1.
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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Journal: Solid State Sciences - Volume 53, March 2016, Pages 71–77