Vol 9: Preparation and antibacterial properties of titanium-doped ZnO from different zinc salts.Report as inadecuate



 Vol 9: Preparation and antibacterial properties of titanium-doped ZnO from different zinc salts.


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This article is from Nanoscale Research Letters, volume 9.AbstractTo research the relationship of micro-structures and antibacterial properties of the titanium-doped ZnO powders and probe their antibacterial mechanism, titanium-doped ZnO powders with different shapes and sizes were prepared from different zinc salts by alcohothermal method. The ZnO powders were characterized by X-ray powder diffraction XRD, Fourier transform infrared spectroscopy FT-IR, ultraviolet-visible spectroscopy UV-vis, scanning electron microscopy SEM, transmission electron microscopy TEM, and selected area electron diffraction SAED, and the antibacterial activities of titanium-doped ZnO powders on Escherichia coli and Staphylococcus aureus were evaluated. Furthermore, the tested strains were characterized by SEM, and the electrical conductance variation trend of the bacterial suspension was characterized. The results indicate that the morphologies of the powders are different due to preparation from different zinc salts. The XRD results manifest that the samples synthesized from zinc acetate, zinc nitrate, and zinc chloride are zincite ZnO, and the sample synthesized from zinc sulfate is the mixture of ZnO, ZnTiO3, and ZnSO4 · 3Zn OH2 crystal. UV-vis spectra show that the absorption edges of the titanium-doped ZnO powders are red shifted to more than 400 nm which are prepared from zinc acetate, zinc nitrate, and zinc chloride. The antibacterial activity of titanium-doped ZnO powders synthesized from zinc chloride is optimal, and its minimum inhibitory concentration MIC and minimum bactericidal concentration MBC are lower than 0.25 g L−1. Likewise, when the bacteria are treated by ZnO powders synthesized from zinc chloride, the bacterial cells are damaged most seriously, and the electrical conductance increment of bacterial suspension is slightly high. It can be inferred that the antibacterial properties of the titanium-doped ZnO powders are relevant to the microstructure, particle size, and the crystal. The powders can damage the cell walls; thus, the electrolyte is leaked from cells.



Author: Sun, Tong; Hao, Han; Hao, Wen-ting; Yi, Shu-min; Li, Xue-peng; Li, Jian-rong

Source: https://archive.org/







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