Titanium Dioxide (TiO₂) Films by Anodic Oxidation in Phosphoric Acid

Abstract:

Anodic oxidation is an electrochemical method for the production of an oxide film on a metallic substrate. It involves the application of an electrical bias at relatively low currents while the substrate is immersed in an acid bath. The films can be very dense and stable, with a variety of microstructural characteristics. In the present work, films of the anatase polymorph of TiO₂ were formed on high-purity Ti foil (50 μm thickness) using phosphoric acid (0.3 M H₃PO₄). The conditions of oxidation involved the application of potentials (5 to 350 V) and current densities (5 to 60 mA.cm^-2) for 10 min at room temperature. The films were characterised using a digital photography, laser Raman microspectroscopy, and field emission scanning electron microscopy. The thicknesses of the oxide films on Ti were measured using a thin film analyser based on optical spectroscopy principles. The colours, thicknesses, and microstructures of the films depended strongly on the applied voltage and current density. At bias more than 15 V, single-phase anatase was observed to form on Ti at low (5 mA.cm^-2) and higher (up to 60 mA.cm^-2) current density.

• Periodical: Advanced Materials Research (Volume 545)
• Pages: 223-228
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.545.223
• Online since: July 2012
• Authors: Hasan Zuhudi Abdullah, Charles C. Sorrell
• Keywords: Anodic Oxidation, Color, Raman Spectroscopy, Titania

References

[1] H.M. Kim, F. Miyaji, T. Kokubo, and T. Nakamura: J. Biomed. Mater. Res. Vol. 32 (1996), p.409.

[2] H.J. Oh, J.H. Lee, Y. Jeong, Y.J. Kim, and C.S. Chi: Surf. Coat. Tech. Vol. 198 (2005), p.247.

[3] T. Kokubo, H. M. Kim, and M. Kawashita: Biomater. Vol. 24 (2003), p.2161.

[4] L. Jonášová, F.A. Müller, A. Helebrant, J. Strnad, and P. Greil: Biomater. Vol. 25 (2004), p.1187.

[5] Y.T. Sul, C.B. Johanson, Y. Jeong, and T. Albrektsson: Med. Eng. Phys. Vol. 23 (2001), p.329.

[6] M.V. Diamanti and M.P. Pedeferri: Corr. Sci. Vol. 49 (2007), p.939.

[7] H.Z. Abdullah and C.C. Sorrell: Mater. Sci. Forum. Vol. 561-565 (2007), p.2159.

[8] J.L. Delplancke, M. Degrez, A. Fontana, and R. Winand: Surf. Tech. Vol. 16 (1989), p.153.

[9] D.J. Blackwood, L.M. Petter: Electrochim Acta, Vol. 34 (1989), p.1505.

[10] T.H. Teh, A. Berkani, S. Mato, P. Skeldon, G.E. Thompson, H. Habazaki, and K. Shimizu, Corr. Sci. Vol. 45 (2003), p.2757.

DOI: 10.1016/s0010-938x(03)00101-x

[11] V.M. Frauchiger, F. Schlottig, B. Gasser, and M. Textor: Biomater. Vol 25, p.593.

[12] H.Z. Abdullah and C.C. Sorrell: Mater. Sci. Forum, Vol 561-565 (2007), p.2159.

[13] Y.T. Sul, C.B. Johansson, S. Petronis, A. Krozer, Y. Jeong, A. Wennerberg, T. Albrektsson : Biomater. Vol. 23 (2002), p.49.