Journal
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
Volume 404, Issue -, Pages -Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jphotochem.2020.112907
Keywords
Core/shell; Magnetic nanocomposites; Photocatalyst; Phosphotungstic acid; Bacterial inactivation
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Funding
- AL-Nahrain Nanorenewable Energy Research Center (NNERC), Al-Nahrain University
- Biotechnology Department, College of Science/University of Baghdad
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A magnetic nanocomposite based on phosphotungstic acid was synthesized and used as a recyclable photocatalyst for bacterial inactivation, showing good stability and efficiency in the process.
In this work, phosphotungstic acid (PW)-based magnetic nanocomposite (Fe@ZnO/PW) was synthesized, characterized and used as a recyclable photocatalyst for bacterial inactivation of pathogenic E. Coli bacterium under LED lamps as a light source. Different characterization methods (X-ray diffraction (XRD), field emission scanning electron microscope (FE-SEM), vibrating sample magnetometer (VSM), BET surface area and pore volume and UV-vis absorption spectra) were used to characterize the synthesized Fe@ZnO and Fe@ZnO/PW magnetic nanocomposites. The Fe@ZnO/PW nanocomposite retaining magnetic properties was easily separated using an external magnet. Fe@ZnO/PW could completely inactivate 10(7) cfu/ml of E. coli after 2 h of irradiation time. Considerably, Fe@ZnO/PW photocatalyst exhibited good stability and no reduction of its photocatalytic bacterial inactivation performance was observed even after six successive cycles.
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