Work

MgO Nanoparticles Based on Plant Extract-Assisted Green Synthesis: Structural Modulation and Antibacterial Mechanism Studies

Year: 2025

Type: article

Abstract: MgO nanoparticles have garnered significant interest owing to their stability, environmental safety, and biocompatibility. However, the low antimicrobial activity of these nanoparticles limits their widespread utilization. Moreover, conventional methods to synthesize MgO nanoparticles are inefficient, costly, and harmful to the environment. To address these limitations, this paper introduces a green synthesis approach using plant extracts as fuels. We systematically investigated the effect of three plant extracts, namely, Moringa oleifera, Cotonier and black tea, on the microstructure and antimicrobial properties of MgO nanoparticles. Transmission electron microscopy (TEM) and scanning electron microscopy (SEM) revealed spherical particles with small sizes (~25nm). X-ray diffraction analysis outcomes confirmed that the synthesized MgO nanoparticles had high purity. Fourier-transform infrared spectroscopy confirmed the presence of Mg–O bonds. The plate-coating count test demonstrated that the MgO nanoparticles possessed notable antimicrobial properties, with those synthesized using Moringa oleifera and black tea exhibiting superior bactericidal efficacy (99.99%). X-ray photoelectron spectroscopy (XPS), electron paramagnetic resonance (EPR), and zeta potential measurements were used to clarify the underlying antimicrobial mechanism.

Source: NANO

DOI: 10.1142/s1793292026500244