Synthesis, Characterization and antibacterial activity of Magnesium Oxide (MgO) nanoparticles.

Abstract Magnesium nitrate hexahydrate Mg (NO 3 ) 2 .6H 2 O, ammonia and distilled water were used for preparation magnesium oxide (MgO) via a precipitation method, where magnesium nitrate is used as a precursor, distilled water as a solvent and ammonia is used to maintain pH of the sample. The MgO was characterized by an X-ray diffractometer microscopy and a UV-Vis spectroscopy. In this study, The average particle size has been investigated by XRD spectroscopy, which came out to be 7 nm by using Scherrer’s equation. The samples had good crystallinity with a preferred orientation in the (222) direction. The energy band gap was estimated using UV-Vis spectroscopy, which is equal to be 4.8eV. As well as, in the present paper, the main goal for preparation Magnesium oxide is to study the antibacterial activity of magnesium oxide. Antibacterial was testing by analyzing the diameter of inhibition zone appeared in disk diffusion tests and minimum inhibitory concentration (MIC) and minimum bactericidal concentration (MBC) of samples dispersed in media. The results of bacterial sensitivity of nanoparticles vary depending on the type of bacteria E. coli and S. aureus, hence revealed the efficacy of magnesium oxide nanoparticles.