Application of nanostructured Ca doped CeO{sub 2} for ultraviolet filtration
- Institute PRISME, site de Chartres, EA 4229 Universite d'Orleans, 21 rue de Loigny la Bataille, 28000 Chartres (France)
- Institute for Superconducting and Electronic Materials, University of Wollongong, NSW 2522 (Australia)
- Centre de Recherche sur la Matiere Divisee, UMR 6619-CNRS, 1b rue de la Ferollerie, 45071 Orleans Cedex 2 (France)
Calcium doped CeO{sub 2} nanoparticles with doping concentrations between 0 and 50 mol% were synthesized by a co-precipitation method for ultraviolet filtration application. Below 20 mol% doping concentration, the samples were single-phase. From 30 mol%, CaCO{sub 3} appears as a secondary phase. The calculated CeO{sub 2} mean crystallite size was 9.3 nm for the pure and 5.7 nm for the 50 mol% Ca-doped sample. Between 250 and 330 nm, the absorbance increased for the 10, 30, and 40 mol% Ca-doped samples compared to the pure one. The band-gap was found to be 3.20 eV for the undoped, and between 3.36 and 3.51 eV for the doped samples. The blue shifts are attributed to the quantum confinement effect. X-ray photoelectron spectroscopy showed that the Ce{sup 3+} atomic concentration in the pure sample was higher than that of the 20 mol% Ca-doped sample.
- OSTI ID:
- 22202586
- Journal Information:
- Materials Research Bulletin, Vol. 45, Issue 5; Other Information: Copyright (c) 2010 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA); ISSN 0025-5408
- Country of Publication:
- United States
- Language:
- English
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