Abstract: Thin films of titania-ceria have been prepared via sol-gel processing by employing titanium and cerium chloride compounds in highly acidic conditions for the precursor sol. This sol-gel route allows obtaining titania-ceria and cerium titanate films, CeTi2O6, after thermal treatment in air. The films exhibit a high optical transparency which is modulated by controlling the composition and the thermal treatment. The materials have been characterized by X-ray diffraction, UV-visible spectroscopy, ellipsometric spectroscopy and atomic force microscopy. The titania-ceria films show, as a function of the composition, the formation of different phases after thermal treatment in air at 800 degrees C. In particular, with the composition Ce25-Ti75 we have obtained a pure cerium titanate phase, CeTi2O6, which can be formed only in a very strict range of compositions. (C) 2009 Elsevier B.V. All rights reserved.
An Alternative Sol–gel Route for the Preparation of Thin Films in CeO2–TiO2 Binary System / Tongjit, Kidchob; Malfatti, Luca; Daniela, Marongiu; Enzo, Stefano; Innocenzi, P. - In: THIN SOLID FILMS. - ISSN 0040-6090. - 518:(2010), pp. 1653-1657. [10.1016/j.tsf.2009.11.078]
An Alternative Sol–gel Route for the Preparation of Thin Films in CeO2–TiO2 Binary System
LUCA MALFATTI;STEFANO ENZO;INNOCENZI P
2010-01-01
Abstract
Abstract: Thin films of titania-ceria have been prepared via sol-gel processing by employing titanium and cerium chloride compounds in highly acidic conditions for the precursor sol. This sol-gel route allows obtaining titania-ceria and cerium titanate films, CeTi2O6, after thermal treatment in air. The films exhibit a high optical transparency which is modulated by controlling the composition and the thermal treatment. The materials have been characterized by X-ray diffraction, UV-visible spectroscopy, ellipsometric spectroscopy and atomic force microscopy. The titania-ceria films show, as a function of the composition, the formation of different phases after thermal treatment in air at 800 degrees C. In particular, with the composition Ce25-Ti75 we have obtained a pure cerium titanate phase, CeTi2O6, which can be formed only in a very strict range of compositions. (C) 2009 Elsevier B.V. All rights reserved.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
