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The development of productive antibacterial agents from nontoxic materials via a simple methodology has been an immense research contribution in the medicinal chemistry field. Herein, a sol-gel one-pot reaction was used to synthesize hybrid composites of hausmannite-chitosan (Mn 3 O 4 -CS) and its innovative derivative zinc manganese oxide-chitosan (ZnMn 2 O 4 -CS). Fixed amounts of CS with different metal matrix w / v ratios of 0.5%, 1.0%, 1.5%, and 2.0% for Mn and Zn precursors were used to synthesize ZnMn 2 O 4 -CS hybrid composites. X-ray diffraction analysis indicated the formation of polycrystalline tetragonal-structured ZnMn 2 O 4 with a CS matrix in the hybrids. Fourier-transform infrared spectroscopic analysis confirmed the formation of ZnMn 2 O 4 -CS hybrids. Detailed investigations of the surface modifications were conducted using scanning electron microscopy; micrographs at different magnifications revealed that the composites' surface changed depending on the ratio of the source materials used to synthesize the ZnMn 2 O 4 -CS hybrids. The antibacterial activity of the Mn 3 O 4 -CS and ZnMn 2 O 4 -CS composites was tested against various bacterial species, including Bacillus subtilis , Escherichia coli , Salmonella typhi , and Pseudomonas aeruginosa. The zone of inhibition and minimum inhibitory concentration values were deduced to demonstrate the efficacy of the ZnMn 2 O 4 -CS nanocomposites as antibacterial agents.

Synthesis and Antibacterial Properties of Novel ZnMn2O4–Chitosan Nanocomposites