Abstract
The current study describes the biological synthesis of manganese oxide nanoparticles from Bacillus thuringiensis, as well as their characterization, biological activity, and toxicity. Nanoparticles may be synthesized in multiple ways, but the biogenic process is the most environmentally friendly and cost-effective. The optical, structural, and crystalline properties of the nanoparticles were investigated. A distinctive peak at 246 nm with a band gap of 3.7eV indicates manganese oxide nanoparticle production. A strong peak at 563.09 cm−1 indicates Mn-O stretching in Fourier Transform Infrared Spectroscopy analysis. X-ray diffraction revealed that the crystalline grain size of manganese oxide nanoparticles was 11.23 nm. The agglomerated spherical shape is seen in the Scanning Electron Microscope and High-Resolution Transmission Electron Microscope investigations. The presence of manganese was verified by the EDAX. Manganese oxide nanoparticles have a significant zeta potential peak of −23.4 mV. This work explored the biological activity of manganese oxide nanoparticles, including antibacterial, anti-inflammatory, antioxidant, and biofilm inhibition studies. To investigate cytotoxicity, Allium cepa root tips are treated with manganese oxide nanoparticles.
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