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Title: Hydrothermal synthesis of CeO2 nano-particles
Authors: Boey, Freddy Yin Chiang
Dong, Zhili
Sun, X. L.
Tok, Alfred Iing Yoong
Keywords: DRNTU::Science::Physics::Heat and thermodynamics
Issue Date: 2007
Source: Tok, A. I. Y., Boey, F. Y. C., Dong, Z., & Sun, X. L. (2007). Hydrothermal synthesis of CeO2 nano-particles. Journal of Materials Processing Technology, 190(1-3), 217-222.
Series/Report no.: Journal of materials processing technology
Abstract: Nano-crystalline particles of CeO2 have been synthesized via a low temperature hydrothermal synthesis process. Two types of precursors were studied—cerium hydroxide and ceria acetate. The precursors were adjusted to a basic (pH 10) and acidic (pH 4) medium before hydrothermal treatment at various durations of 6, 12, 18, and 24 h at 250 °C using a Teflon-lined hydrothermal bomb. The synthesized samples were characterized using DTA/TGA, XRD and TEM. Based on the characterization results, both precursor systems produced crystalline ceria nano-particles after 6 h of hydrothermal synthesis at 250 °C. The average crystallite sizes were 6 and 15 nm for the hydroxide and acetate system, respectively. The acetate precursor system appeared to produce better particles in terms of crystallinity and morphology. Based on the DTA/TGA analysis, hydrothermal synthesis had been effective in reducing the amount of intermediate products. With increasing hydrothermal treatment duration of up to 24 h, the samples did not exhibit a remarkable improvement in properties. The synthesized nano-particles were subsequently heat treated at 500 and 1000 °C for 2 h. After the heat treatment, enhanced crystallinity and growth in crystallite size was observed, but particles appeared more agglomerated.
ISSN: 0924-0136
DOI: 10.1016/j.jmatprotec.2007.02.042
Rights: © 2007 Elsevier B.V. This is the author created version of a work that has been peer reviewed and accepted for publication by Journal of Materials Processing Technology, Elsevier B.V. It incorporates referee’s comments but changes resulting from the publishing process, such as copyediting, structural formatting, may not be reflected in this document. The published version is available at: [].
Fulltext Permission: open
Fulltext Availability: With Fulltext
Appears in Collections:MSE Journal Articles

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