Author: A. D. Patil, U. P. Lad, R. S Patil, J. U. Patil, O. S. Kushwaha, and T. J. Shinde

DOI: http://doi.org/10.31788/RJC.2026.1939283

The sol-gel auto-combustion process is a known wet chemical method applied for the synthesis of composites, especially Mixed Transition Metal Oxides (MTMOs). Herein, we report the sol-gel auto combustion method for thepreparation of Zn-substituted MnAl2O4 (% of Zn varies from 0%, 25%, 50%, 75% and 100%) using respective metal nitrates as a precursor. The as-synthesised materials were characterised by using X-Ray Diffraction (XRD), FieldEmission-Scanning Electron Microscopy (FE-SEM), Energy-dispersive X-ray spectroscopy (EDS), Fourier Transform-Infrared spectroscopy (FT-IR), UV–Visible spectroscopy (UV–Vis.) and Thermal Analysis (TGA). Moreover, the antimicrobial properties of the synthesised compositions of ZMA (0%, 25%, 50%, 75%and 100%) against both lab isolated Gram-positive (S. aureus) and Gram-negative (E. coli, P. aeruginosa, Salmonella spp.), were tested by the agar well diffusion method. The study clearly reveals that ZMA (50%) composition has a strongantibacterial potential.

Keywords: Zn Substituted MnAl2O4, ZMA, Sol-gel Auto Combustion, Mixed Transition Metal Oxides (MTMOs), Antimicrobial Activity, Salmonella spp., E. coli, P. aeruginosa and S. aureus