• Mylarappa, M.
• Kantharaju, S.
• Rekha, S.
• Chandruvasan, S.

Abstract

<jats:p>It has been reported that an effective synthesis of rGO-Nb<jats:sub>2</jats:sub>O<jats:sub>5</jats:sub> composite for electrochemical sensor studies has been reported. The modified Hummer's method was used to produce reduced graphene oxide (rGO). The metal oxide (Nb<jats:sub>2</jats:sub>O<jats:sub>5</jats:sub>) was introduced to the rGO via the hydrothermal method to form the composite. X-ray diffraction (XRD), scanning electron microscopy (SEM) and Fourier transform infrared spectroscopy (FTIR), and were used to examine the sample. The CV measurements show a significant improvement in electrochemical reversibility, with the specific capacitances of rGO and Nb<jats:sub>2</jats:sub>O<jats:sub>5</jats:sub>/rGO being 45 and 110 Fg<jats:sup>-1</jats:sup>, respectively. These results indicate that the capacitive behavior and electron transfer of the Nb<jats:sub>2</jats:sub>O<jats:sub>5</jats:sub>/rGO nano composite was significantly higher than that of rGO. The charge-discharge curves show good symmetry and linear deviations with time change, indicating superior capacitance. This is primarily due to the electrode reversible reaction, and it has also been revealed as a type of super capacitor electrode material. The electrode materials obtained have the highest specific capacitance and excellent rate capability.</jats:p>

Topics

• impedance spectroscopy
• scanning electron microscopy
• x-ray diffraction
• composite
• Fourier transform infrared spectroscopy