Self-cleaning coatings based on titanium dioxide for Architectural Heritage

Document Type : Research Article

Author

Institute for Color Science & Technology, Tehran, Iran

/2017.6.21.5

Abstract

The development and application of self-cleaning treatments on historical and architectural stone surfaces
could be a significant improvement in conservation, protection and maintenance of Cultural Heritage.
In this research, a coating based on titanium dioxide was prepared and applied on travertine stone. The
prepared coating was analyzed and the result, confirmed the formation of small crystals of Anatase. The
hydrophilic behavior was observed on the surface due to titanium dioxide coatings. Also self-cleaning
behavior was proved by using Rodamine B.

Keywords

References

  1. O. Carp, C.L. Huisman, A. Reller, Photoinduced reactivity of titanium dioxide. Progress in Solid State Chemistry, 32(2004), 33–177.
  2. X. Chen, S.S. Mao, Titanium dioxide nanomaterials: synthesis, properties, modifications, and applications. Chemical Reviews, 107(2007), 2891–2959.
  3. U. Diebold, The surface science of titanium dioxide. Surface Science Reports, 48(2003), 53–229.
  4. D. Ollis, Kinetics of photocatalyzed film removal on self-cleaning surfaces: simple configurations and useful models.  Applied Catalysis B, 99 (2010), 478–484.
  5. M.V. Diamanti, M. Ormellese, M.P. Pedeferri, Characterization of photocatalytic and superhydrophilic properties of mortars containing titanium dioxide. Cement and Concrete Research, 38(2008), 1349–1353.
  6. A. Fujishima, T.N. Rao, and D.A. Tryk, Tio2 photocatalysts and diamond electrodes. Electrochimica Acta, 45(2000), 4683–4690.
  7. A. Fujishima and X. Zhang, Titanium dioxide photocatalysis: present situation and future approaches.  Comptes Rendus Chimie, 9(2006), 750–760.
  8. C. Brinker and G. Scherer, Sol-Gel Science: the physics and chemistry of sol-gel processing, Academic Press, 1990.
  9. S.M. Melpolder, A. W. West, C. L. Bauer, Microhardness characterization of 80/20 mol% TiO2/SiO2 sol-gel films. MRS Proceedings, 239(1991), 371–375.
  10. M. Mallak, M. Bockmeyer, P. Löbmann, “Liquid phase deposition of TiO2 on glass: Systematic comparison to films prepared by sol-gel processing. Thin Solid Films, 515(2007), 8072–8077.
  11. L. Pinho, M.J. Mosquera, Titania-silica nanocomposite photocatalysts with application in stone self-cleaning. The Journal of Physical Chemistry C, 115(2011), 22851–22862.
  12. A. Monshi, M.R. Foroughi, M.R. Monshi, Modified Scherrer equation to estimate more accurately nano-Crystallite size using XRD.  World Journal of Nano Science and Engineering, 2(2012), 154-160.
  13. B. Ruot, A. Plassais, F. Olive, L. Guillot, L. Bonafous, TiO2-containing cement pastes and mortars: Measurements of the photocatalytic efficiency using a rhodamine b-based colourimetric test. Solar Energy, 83(2009), 1794–1801.

UNI Ente Nazionale Italiano di Unificazione, UNI 11259:2008, Determi-nation of the photocatalytic activity of hydraulic binders — rodammina test method, 2008.

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