Facile and green-assisted synthesis of V₂O₅ Nps and investigated their multifunctional activities

This work reports the synthesized V₂O₅ nanoparticles (Nps) using a simple combustion method with Cleome gynandra seed extract as fuel. Several analytical tools were used to characterize the synthesized Nps, including X-ray diffraction (XRD), scanning electron microscopy (SEM), energy dispersive X-ray (EDX), transition electron microscopy (TEM), UV–Vis spectroscopy (UV–Vis), Raman spectroscopy, and Fourier transform infrared spectroscopy (FTIR). SEM analysis confirms the needle-like and rectangular wire structures of the V₂O₅ Nps. The bandgap energy was found to be 2.28 eV, indicating the semiconducting nature of the synthesized nanoparticles. Furthermore, the V₂O₅ nanoparticles were used as photocatalysts for the degradation of methylene blue dye under visible light illumination. The V₂O₅ Nps exhibited 89% performance in the decomposition of methylene blue (MB) dye after 180 min of irradiation. Cyclic voltammetry studies demonstrated superior oxidation and reduction reaction of the V₂O₅ Nps using 1 M KCl as an electrolyte in a three-electrode system at a scan rate of 10 to 50 mV/s. The lower charge resistance of the V₂O₅ Nps was explained by electrochemical impedance spectroscopy (EIS). Additionally, the V₂O₅ Nps showed promise as an electrode material for ammonia and ethanol biosensors. These Nps also exhibited antioxidant and antimicrobial properties and were biocompatible with lymphocytes.