The present work focus on the synthesis and structural characterization of ZnO and MgO Nanoparticles using geranium leaves extract as reducing agent through green approach. The prepared ZnO and MgO Nanoparticles were characterized using X-Ray Diffraction (XRD), Scanning Electron Microscopy (SEM).The elemental composition of ZnO and MgO Nanoparticles were investigated using Energy Dispersive X-ray analysis (EDAX). Based on the XRD data, the ZnO and MgO particles were measured to be 64 and 42 nanometers in size, respectively. The DPPH method was used to further test the antioxidant property of the synthesized Nanoparticles. MgO and ZnO were both found to be excellent free radical scavengers, as measured by their DPPH scavenging activities. The antioxidant property of MgO is enhanced when compared to ZnO nanoparticles.
It has been reported that an effective synthesis of rGO-Nb2O5 composite for electrochemical sensor studies has been reported. The modified Hummer's method was used to produce reduced graphene oxide (rGO). The metal oxide (Nb2O5) 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 Nb2O5/rGO being 45 and 110 Fg-1, respectively. These results indicate that the capacitive behavior and electron transfer of the Nb2O5/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.
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