Journal
MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE MATERIALS
Volume 183, Issue -, Pages 78-85Publisher
ELSEVIER
DOI: 10.1016/j.mseb.2014.01.007
Keywords
TiO2-CeO2; Optic band gap; Photocatalyst; Electrophoretic deposition; Nanostructured films
Funding
- CONACYT [83880]
- CIC - UMSNH
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The TiO2-CeO2 photocatalytic system in films is proposed here, in order to obtain photocatalytic systems that can be excited by solar light. The films were obtained through the electrophoretic deposition (EPD) of TiO2-CeO2 gel on sputtered Ti Corning glass substrates. The synergic effect of CeO2 in TiO2 films was analyzed as a function of the optical band gap reduction at different concentrations (1, 5, 10, and 15 mol%). The effect of two thermal treatments was also evaluated. The lowest band gap value was obtained for the sample with 5 mol% ceria that was thermally treated at 700 degrees C. The nanostructured films were characterized by Raman spectroscopy, scanning electron microscopy (SEM), transmission electron microscopy (TEM), high angle annular dark field (HAADF), high resolution transmission electron microscopy (HRTEM), and atomic force microscopy (AFM). The nanocomposites were formed by TiO2 and CeO2 nanoparticles in the anatase and fluorite type phases, respectively. (C) 2014 Elsevier B.V. All rights reserved.
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