Nanostructured ZnO synthesis and its application for effective disinfection of Escherichia coli micro organism in water

作者：Gondal M A^*; Dastageer M A; Khalil A; Hayat K; Yamani Z H

来源：Journal of Nanoparticle Research, 2011, 13(8): 3423-3430.

DOI：10.1007/s11051-011-0264-8

• Synthesis of nano-structured ZnO
• Laser induced photo catalysis
• Water disinfection
• Waste water treatment
• E. Coli
• Health effects

Nanostructured ZnO photo catalyst was synthesized by precipitation method and was applied in conjunction with 355 nm pulsed laser irradiation for effective disinfection of the water contaminated with Escherichia coli micro organism. The morphological studies using X-Ray Diffractometer (XRD) and Transmission Electron Microscope (TEM) were carried out on the synthesized nano-ZnO, and these studies indicated that the catalyst has the crystallographic structure of hexagonal wurtzite and has the grain size of around 20-40 nm. The bacteria decay rate constants were estimated for nine different concentrations of nano-ZnO in infected water. The parametric optimization was carried out, and we could reach the decay rate constant as high as 0.24 min (,) (-1) which is higher than micro-structured ZnO and the familiar TiO(2) photo catalysts under similar experimental condition.

• 出版日期2011-8
• 单位中国石油大学（北京）