Skip to main content

Titania and silver-titania composite films on glass-potent antimicrobial coatings

Page, Kristopher, Palgrave, Robert G., Parkin, Ivan P., Wilson, Michael, Savin, Shelly L. P., Chadwick, Alan V. (2007) Titania and silver-titania composite films on glass-potent antimicrobial coatings. Journal of Materials Chemistry, 17 (1). pp. 95-104. ISSN 0959-9428. (doi:10.1039/b611740f) (Access to this publication is currently restricted. You may be able to access a copy if URLs are provided) (KAR id:2194)

Language: English

Restricted to Repository staff only
Contact us about this Publication
[thumbnail of page.pdf]
Official URL


Titania (anatase) and Ag-doped titania (anatase) coatings were prepared on glass microscope slides by a sol - gel dip-coating method. The resultant coatings were characterised by X-ray diffraction, X-ray absorption near edge structure (XANES), Raman, scanning electron microscopy (SEM), wavelength dispersive X-ray (WDX) analysis, X-ray photoelectron spectroscopy (XPS) and UV-vis techniques and shown to consist of anatase with ca. 0.2 - 1 atom% Ag2O. Photocatalytic activity of the coatings was determined by photomineralisation of stearic acid, monitored by FT-IR spectroscopy. Photocatalytically-active coatings were screened for their antibacterial efficacy against Staphylococcus aureus (NCTC 6571), Escherichia coli ( NCTC 10418) and Bacillus cereus (CH70-2). Ag-doped titania coatings were found to be significantly more photocatalytically and antimicrobially active than a titania coating. No antimicrobial activity was observed in the dark - indicating that silver ion diffusion was not the mechanism for antimicrobial action. The mode of action was explained in terms of a charge separation model. The coatings also demonstrated significantly higher activity against the Gram-positive organisms than against the Gram-negative. The Ag2O - TiO2 coating is a potentially useful coating for hard surfaces in a hospital environment due to its robustness, stability to cleaning and reuse, and its excellent antimicrobial response.

Item Type: Article
DOI/Identification number: 10.1039/b611740f
Subjects: Q Science > QD Chemistry
Divisions: Divisions > Division of Natural Sciences > School of Physical Sciences
Depositing User: Suzanne Duffy
Date Deposited: 19 Dec 2007 17:43 UTC
Last Modified: 16 Feb 2021 12:14 UTC
Resource URI: (The current URI for this page, for reference purposes)
  • Depositors only (login required):


Downloads per month over past year