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Application of Two-dimensional P-type ZnO Powder Illuminated By Visible Light for the Inhibition of Gram-positive and Gram-negative Bacteria in Water.
- Source :
-
Food & Bioprocess Technology . Sep2024, Vol. 17 Issue 9, p2902-2912. 11p. - Publication Year :
- 2024
-
Abstract
- Bacteria affect food quality in developing countries by spreading through contaminated soils and water. Antibiotics are used indiscriminately to eliminate Gram-positive and Gram-negative bacteria, with varying degrees of success. The use of nanomaterials with bactericidal properties can minimize the overuse of antibiotics. In this study, a two-dimensional p-type ZnO powder was successfully synthesized and its bactericidal properties were demonstrated. The XRD and Raman spectroscopy results indicated the presence of wurtzite-phase ZnO with Oi as the predominant native defect, resulting in p-type conductivity. SEM analysis confirmed the two-dimensional morphology, and optoelectronic characterization revealed a bandgap of 3.17 eV. Despite this high bandgap value, a plasmonic effect was generated on the surface of two-dimensional ZnO, which enhanced its bactericidal properties when the powders were in contact with bacteria. From an initial colony level of 5.5 × 105 CFU/mL, a significant decrease in the number of Gram-positive bacteria to 1.15 × 105 CFU/mL was observed, whereas the number of Gram-negative bacteria slightly increased to 1.45 × 106 CFU/mL. The observed inhibition rates were higher than those achieved with the broad-spectrum antibiotic, as validated in this study. The use of two-dimensional ZnO may provide a sustainable solution for the eradication of waterborne pathogens using visible light alone. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 19355130
- Volume :
- 17
- Issue :
- 9
- Database :
- Academic Search Index
- Journal :
- Food & Bioprocess Technology
- Publication Type :
- Academic Journal
- Accession number :
- 179068103
- Full Text :
- https://doi.org/10.1007/s11947-023-03300-0