Synergic effect of the TiO2-CeO2 nanoconjugate system on the band-gap for visible light photocatalysis
| Autor: | M.I. Espitia-Cabrera, E. Barajas-Ledesma, M. Lorena García-Benjume, Víctor I. Macías-Andrés, M.E. Contreras-García, A. Medina-Flores |
|---|---|
| Rok vydání: | 2014 |
| Předmět: |
Anatase
Materials science Scanning electron microscope Band gap Mechanical Engineering Nanotechnology Condensed Matter Physics Dark field microscopy symbols.namesake Chemical engineering Mechanics of Materials Transmission electron microscopy Photocatalysis symbols General Materials Science High-resolution transmission electron microscopy Raman spectroscopy |
| Zdroj: | Materials Science and Engineering: B. 183:78-85 |
| ISSN: | 0921-5107 |
| DOI: | 10.1016/j.mseb.2014.01.007 |
| Popis: | The TiO 2 -CeO 2 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 TiO 2 -CeO 2 gel on sputtered Ti Corning glass substrates. The synergic effect of CeO 2 in TiO 2 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 °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 TiO 2 and CeO 2 nanoparticles in the anatase and fluorite type phases, respectively. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect