Moringa Oleifera leaf extract mediated synthesis of reduced graphene oxide-vanadium pentoxide nanocomposite for enhanced specific capacitance in supercapacitors

Moringa Oleifera leaf extract has been prepared and used as an environmental-friendly reducing agent. Reduced graphene oxide (RGO) has been decorated with vanadium pentoxide (V2O5) in presence of Moringa Oleifera leaf extract to generate a RGO/V2O5 nanocomposite. Analytical, spectroscopic, and electrochemical characterizations of synthesized V2O5, RGO, and RGO/V2O5-nanocomposite have been used to evaluate its morphology and structure. The RGO production and recombination with V2O5 are confirmed by the Characterization result. RGO, V2O5, and RGO/V2O5 nanocomposite have been evaluated for their electrochemical performances in super capacitor applications by using various electrochemical techniques. The enhanced specific capacitance of 906 Fg(-1) has been accomplished for RGO/V2O5 nanocomposite compared to 146 and 535 Fg(-1) for V2O5 and RGO, respectively, at 2 mVs(-1) scan rate using cyclic voltammetry (CV) technique. Chronopotentiometry technique has also been evaluated and observed the specific capacitance of 380 Fg(-1) at a current density of 0.5 Ag-1. RGO/ V(2)O(5 )nanocomposite could be a choice of material in energy storage devices.

Automated summary

Moringa Oleifera leaf extract was used as a reducing agent to prepare a environmentally-friendly RGO/V2O5 nanocomposite. The morphology and structure of the synthesized materials were evaluated using analytical, spectroscopic, and electrochemical characterizations. The electrochemical performances of RGO, V2O5, and RGO/V2O5 nanocomposite were studied for super capacitor applications. The RGO/V2O5 nanocomposite showed enhanced specific capacitance compared to V2O5 and RGO alone.