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

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Abstract

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 TiO2 photo catalysts under similar experimental condition.

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Acknowledgments

The support by KACST through project number 28-40 and KFUPM is gratefully acknowledged.

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Authors and Affiliations

  1. Laser Research Group, Physics Department and Center of Excellence in Nanotechnology, King Fahd University of Petroleum and Minerals, Dhahran, 31261, Saudi Arabia

    M. A. Gondal, M. A. Dastageer, A. Khalil & Z. H. Yamani

  2. Department of Chemistry, King Fahd University of Petroleum and Minerals, Dhahran, 31261, Saudi Arabia

    K. Hayat

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  1. M. A. Gondal
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  2. M. A. Dastageer
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  3. A. Khalil
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  4. K. Hayat
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  5. Z. H. Yamani
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Correspondence to M. A. Gondal.

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Gondal, M.A., Dastageer, M.A., Khalil, A. et al. Nanostructured ZnO synthesis and its application for effective disinfection of Escherichia coli micro organism in water. J Nanopart Res 13, 3423–3430 (2011). https://doi.org/10.1007/s11051-011-0264-8

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  • DOI: https://doi.org/10.1007/s11051-011-0264-8

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