Evaluation of structural, optical, and morphological properties of nickel oxide nanoparticles for multi-functional applications

A simple sonication assisted green synthesis method was adopted to prepare nickel oxide nanoparticles usingMoringaleaf extract as reducing agent and capping agent. The structural, optical, morphological, photocatalytic, and antimicrobial properties of NiO nanoparticles have been analyzed through different techniques X-ray diffraction (XRD), field emission scanning electron microscopy (FESEM), high-resolution transmission electron microscopy (HRTEM), and UV-vis spectrometer. The average crystallite size of NiO nanoparticles is 12 nm which is well matched with the particle size calculated from TEM micrographs. The FESEM and HRTEM micrographs clearly show the spherical shaped nanoparticles with uniform distribution. The multi-functional applications like anticorrosive, photocatalytic, and antimicrobial activity of NiO nanoparticles are also analyzed. The green synthesis influenced more in the performance of antibacterial activities of NiO nanoparticles forStaphylococcus aureus and Escherichia coli.

Automated summary

Nickel oxide nanoparticles were successfully synthesized using a simple sonication assisted green synthesis method with Moringa leaf extract as both reducing agent and capping agent. The nanoparticles exhibited good structural, optical, and antimicrobial properties, with spherical morphology and uniform distribution. The green synthesis method significantly influenced the antibacterial activities of the nanoparticles against Staphylococcus aureus and Escherichia coli.