Analyzing the synergistic effect of Mg on Mentha spicata L. mediated Mn2O3 nanoparticles for energy storage and bio-medical applications

This article describes the facile preparation of cubic structured pure and Mg-doped Mn₂O₃ nanoparticles by green synthesis method. The prepared pure and Mg-doped Mn₂O₃ nanoparticles were investigated to determine their structure, functional group, band gap, morphology and composition. The cubic structured Mn₂O₃ and Mg-doped Mn₂O₃ nanoparticles were clearly confirmed by X-Ray Diffraction (XRD) and Field Emission Scanning Electron Microscope (FE-SEM) micrographs. Fourier transform infrared (FTIR) spectroscopy spectra revealed two distinct vibration peaks corresponding to the symmetric stretching Mn–O and Mn–O–Mn, which was well supported by the UV and PL outcomes. A Cyclic Voltammetry study was explored for the prepared pure and Mg-doped samples at different scan rates (mV/s). Apparently, Mg-doped Mn₂O₃ nanoparticles exhibited the highest specific capacitance value of 266 F/g with an energy density of 430 Wh/kg. The prepared sample also exhibited antimicrobial activity by showing variation in the zone of inhibition with respect to selected bacteria and fungi. The results of the study suggest that the prepared Mg-doped nanoparticles could act as a promising supercapacitor, anti-biofilm, anti-oxidant agent and water purifier.