Electrochemical characteristics and antimicrobial efficacy of NiV2O6 nanoparticles

In this study, NiV2O6 nanoparticles were successfully synthesized via the sol–gel method and evaluated for their dual applications in energy storage and antimicrobial activity. X-ray diffraction (XRD) analysis confirmed the formation of a crystalline NiV2O6 phase indexed to the anorthic system. Field Emission Scanning Electron Microscopy (FESEM) revealed a sheet-like morphology with particle sizes ranging from 1 µm to 100 nm, providing a moderate surface area and effective ion diffusion channels. X-ray photoelectron spectroscopy (XPS) analysis of Ni2+ and V5+ oxidation states in NiV2O6 nanoparticles, supporting the successful formation of the mixed-metal oxide structure. Electrochemical analysis demonstrated excellent capacitive behaviour, with a high specific capacitance of 640.91 F/g from cyclic voltammetry (CV) and 772.73 F/g from galvanostatic charge–discharge (GCD) measurements. The electrode exhibited remarkable energy storage performance, delivering an energy density of 20.79 Wh/kg and a high-power density of 1096.4 W/kg. Moreover, outstanding cyclic stability was observed with 92% capacitance retention after 1500 cycles. Furthermore, the NiV2O6 nanoparticles displayed significant antimicrobial activity against both bacterial and fungal organisms, attributed to the synergistic effect of Ni2+/V5+ ions and high surface reactivity. These findings highlight the potential of NiV2O6 nanoparticles as a multifunctional material suitable for next-generation energy storage devices and antimicrobial activities.