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.
Original language | English |
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Pages (from-to) | 3423-3430 |
Number of pages | 8 |
Journal | Journal of Nanoparticle Research |
Volume | 13 |
Issue number | 8 |
DOIs | |
State | Published - Aug 2011 |
Bibliographical note
Funding Information:Acknowledgments The support by KACST through project number 28-40 and KFUPM is gratefully acknowledged.
Keywords
- E. Coli
- Health effects
- Laser induced photo catalysis
- Synthesis of nano-structured ZnO
- Waste water treatment
- Water disinfection
ASJC Scopus subject areas
- Bioengineering
- Atomic and Molecular Physics, and Optics
- General Chemistry
- Modeling and Simulation
- General Materials Science
- Condensed Matter Physics