Browsing by Author "Muhammad Waqas Bashir"

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    Synthesis, characterization, and antimicrobial properties of Mn-doped ZnO nanoparticles
    (Umt, Lahore, 2015) Muhammad Waqas Bashir
    In this study, synthesis, characterization and antimicrobial properties of pure and Mn-doped ZnO nanoparticles have been investigated. Undoped and Mn-doped ZnO nanoparticles were prepared by using Co-precipitation method. The synthesized Mn-doped ZnO nanoparticles were characterized by XRD, SEM, EDX, and UV-Vis spectroscopy was used to measure the band gap energy. The antimicrobial activity of Mn-doped ZnO nanoparticles was carried out by using agar diffusion method. Formation of nanoparticles was confirmed by XRD technique. XRD analysis showed hexagonal wurtzite structure of Mn doped and undoped ZnO nanoparticles. The average grain size for undoped ZnO nanoparticles was 16.72nm, and the size of Mn-doped ZnO nanoparticles was 6.14nm synthesized by co-precipitation method with different chemicals. Surface morphology and particle size of undoped and Mn-doped ZnO nanoparticles were confirmed by SEM analysis. EDX analysis was used to confirm the presence of Mn in both samples prepared by co-precipitation method. The band gap energy for Mn-doped ZnO nanoparticles was found to be 3.585eV and 2.737eV for method 1 and method 2, respectively.The antimicrobial property of Mn-doped ZnO nanoparticles against E.coli and B.subtilis were investigated by agar diffusion assay. The antimicrobial test results were good for method 2 rather than method 1. The antimicrobial results were also showed that as the concentration of Mn-doped ZnO nanoparticles was increased; the growth of inhibition zones was also increased.