Room temperature co-precipitation of nanocrystalline CeO2 and Ce0.8Gd0.2O1.9-delta powder
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2007-04-01
Autores
Godinho, M. J.
Goncalves, R. F.
Santos, L. P. S.
Varela, José Arana [UNESP]
Longo, Elson [UNESP]
Leite, E. R.
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Elsevier B.V.
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This paper describes a simple method to co-precipitate CeO2 and Ce0.8Gd0.2O1.9-delta with ammonium hydroxide from solvents such as: water, ethylene glycol, ethyl alcohol and isopropyl alcohol. Characterization by Raman spectroscopy and XRD evidenced the formation of a solid solution of gadolinium-doped ceria at room temperature. Nanometric particles with crystallite size of 3.1 nm were obtained during synthesis using ethyl alcohol as solvent. This is a promising result compared with those mentioned in the literature, in which the smallest crystallite size reported was, 6.5 nm. (c) 2006 Elsevier B.V. All rights reserved.
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Materials Letters. Amsterdam: Elsevier B.V., v. 61, n. 8-9, p. 1904-1907, 2007.