Synthesis, characterization and anti-bacterial activity of Mg and Ba-doped ZnO Nanoparticles

Abstract

Mg and Ba-doped zinc oxide nanoparticles were prepared by chemical precipitation method. The prepared nanoparticles were annealed at 700 °C. The Wurtzite geometry was confirmed in the X-ray diffraction. The crystallite size was found from the Debye-Scherer’s formula. The dopant Ba highly influences crystalline size than the dopant Mg. From Tauc’s plot, the band gap of the prepared samples was calculated and analyzed. The red shifted band gap was observed due to the metal dopant. From the charge carrier concentration, it was observed that the prepared nanoparticles were p-type in nature. The refractive index decreases as the metal dopant concentration increases. High metal doping concentration inhibits the growth of E. coli. Ba-doped zinc oxide nanoparticles have high anti-bacterial activity than Mg-doped nanoparticles.