Hydrothermal synthesis of CeO2 nano-particles
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 du...
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| Format: | Journal Article |
| Language: | English |
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2013
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| Online Access: | https://hdl.handle.net/10356/95329 http://hdl.handle.net/10220/9404 |
| _version_ | 1826113465601753088 |
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| author | Boey, Freddy Yin Chiang Dong, Zhili Sun, X. L. Tok, Alfred Iing Yoong |
| author2 | School of Materials Science & Engineering |
| author_facet | School of Materials Science & Engineering Boey, Freddy Yin Chiang Dong, Zhili Sun, X. L. Tok, Alfred Iing Yoong |
| author_sort | Boey, Freddy Yin Chiang |
| collection | NTU |
| description | 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. |
| first_indexed | 2024-10-01T03:23:41Z |
| format | Journal Article |
| id | ntu-10356/95329 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T03:23:41Z |
| publishDate | 2013 |
| record_format | dspace |
| spelling | ntu-10356/953292023-07-14T15:51:13Z Hydrothermal synthesis of CeO2 nano-particles Boey, Freddy Yin Chiang Dong, Zhili Sun, X. L. Tok, Alfred Iing Yoong School of Materials Science & Engineering DRNTU::Science::Physics::Heat and thermodynamics 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. Accepted version 2013-03-14T09:02:35Z 2019-12-06T19:12:42Z 2013-03-14T09:02:35Z 2019-12-06T19:12:42Z 2007 2007 Journal Article 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. 0924-0136 https://hdl.handle.net/10356/95329 http://hdl.handle.net/10220/9404 10.1016/j.jmatprotec.2007.02.042 en Journal of materials processing technology © 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: [http://dx.doi.org/10.1016/j.jmatprotec.2007.02.042]. application/pdf |
| spellingShingle | DRNTU::Science::Physics::Heat and thermodynamics Boey, Freddy Yin Chiang Dong, Zhili Sun, X. L. Tok, Alfred Iing Yoong Hydrothermal synthesis of CeO2 nano-particles |
| title | Hydrothermal synthesis of CeO2 nano-particles |
| title_full | Hydrothermal synthesis of CeO2 nano-particles |
| title_fullStr | Hydrothermal synthesis of CeO2 nano-particles |
| title_full_unstemmed | Hydrothermal synthesis of CeO2 nano-particles |
| title_short | Hydrothermal synthesis of CeO2 nano-particles |
| title_sort | hydrothermal synthesis of ceo2 nano particles |
| topic | DRNTU::Science::Physics::Heat and thermodynamics |
| url | https://hdl.handle.net/10356/95329 http://hdl.handle.net/10220/9404 |
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