Preparation of CeO2 by a simple microwave-hydrothermal method
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Data
2009-03-09
Autores
Riccardi, C. S. [UNESP]
Lima, R. C.
dos Santos, M. L. [UNESP]
Bueno, Paulo Roberto [UNESP]
Varela, José Arana [UNESP]
Longo, Elson [UNESP]
Título da Revista
ISSN da Revista
Título de Volume
Editor
Elsevier B.V.
Resumo
Cerium carbonate hydroxide (orthorhombic Ce(OH)CO3) hexagonal-shaped microplates were synthesized by a simple and fast microwave-hydrothermal method at 150 degrees C for 30 min. Cerium nitrate, urea and cetyltrimethylammonium bromide were used as precursors. Ceria (cubic CeO2) rhombus-shape was obtained by a thermal decomposition oxidation process at 500 degrees C for 1 h using as- synthesized Ce(OH)CO3. The products were characterized by X-ray powder diffraction, field-emission scanning electron microscopy, thermogravimetric analysis and Fourier transformed infrared spectroscopy. The use of microwave-hydrothermal method allowed to obtain cerium compounds at low temperature and shorter time compared to other synthesis methods. (C) 2008 Elsevier B.V. All rights reserved.
Descrição
Palavras-chave
Cerium compounds, Ceria, Microwave-hydrothermal method, Thermal decomposition oxidation
Como citar
Solid State Ionics. Amsterdam: Elsevier B.V., v. 180, n. 2-3, p. 288-291, 2009.