Influence of cobalt doping on chemical and green synthesized magnesium oxide nanoparticles for enhanced photocatalytic evaluation, adsorption studies, antimicrobial analysis and corrosion inhibition study

Abstract

In this study, Cobalt-doped magnesium oxide nanoparticles (Co-MgO-Nps) were successfully synthesized using two different methods: co-precipitation via chemical synthesis and co-precipitation via a green synthesis approach. The originality of this research lies in the diverse applications that were explored using these nanoparticles. The study investigated various potential uses of Co-MgO-Nps, thereby highlighting their versatility and broad range of applications. X-ray diffraction (XRD), Fourier Transformed Infrared Spectroscopy (FTIR), Scanning Electron Microscope (SEM), Thermogravimetric Analysis (TGA), Energy-Dispersive X-ray (EDX) analysis, UV–Vis Diffusion Reflectance Spectroscopy, BET adsorption isotherm, Transmission Electron Microscope (TEM), Photoluminescence (PL), Zeta potential and particle size determination were used to investigate and characterize the synthesizedCo-MgO-Nps. The photocatalytical degradationability of Co-MgO-Npsunder UV light irradiation wasstudied on potentially dangerous malachite green dye. The synthesizedCo-MgO-Nps showed outstanding photocatalytic performance in various ppm concentrations. Adsorption studies using malachite green dye at numerous ppm levels revealed that the Co-MgO-Nps synthesized by green approach degraded the dye more quickly than those synthesized chemically. Antimicrobial activities were evaluated against E. coli with different concentrations; the findings confirmed that the Co-MgO-Nps produced from green synthesis approach showed superior antimicrobial activity than the chemically synthesized Co-MgO-Nps. The synthesized Co-MgO-Nps showed good efficiency for inhibiting corrosion of maraging steel by hydrochloric acid.