Synthesis and characterization of Sn‑doped TiO2 flm for antibacterial applications
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Date
2021
Journal Title
Journal ISSN
Volume Title
Publisher
Springer
Abstract
Simple sol–gel method has been exploited to deposit Sn-doped TiO2 thin flms on glass substrates. The resultant coatings
were characterized by X-ray difraction (XRD), UV–visible techniques (UV–Vis), Fourier transform infrared spectroscopy
(FTIR), and photoluminescence analysis (PL). The XRD pattern reveals an increase in crystallite size of the prepared samples
with the increasing doping concentration. A decrease in doping concentrating resulted in the decrease in bandgap values. The
diferent chemical bonds on these flms were identifed from their FTIR spectra. The photoluminescence analysis shows an
increase in the emission peak intensity with increasing dopant concentration, and this can be attributed to the efect created
due to surface states. The prepared samples were tested as antibacterial agent toward both Gram-positive and Gram-negative
bacteria like S.aureus (Staphylococcus aureus) and E.coli (Escherichia coli), respectively. The size of the inhibition zones
indicates that the sample shows maximum inhibitory property toward E.coli when compared to S.aureus.
Description
Keywords
Sn-doped TiO2, Optical properties, Electron microscopy, Antibacterial effect, Dip coating
Citation
Rajeswari, R., Venugopal, D., George, A., Raj, A. D., Sundaram, S. J., Bashir, A. K. H., Maaza, M., & Kaviyarasu, K. (2021). Synthesis and characterization of Sn-doped TiO2 film for antibacterial applications. Applied Physics A: Materials Science and Processing, 127(7). https://doi.org/10.1007/s00339-021-04656-w