| Synthesis and Characterization of Y-Doped Mesoporous CeO2 Using A Chemical Precipitation Method |
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| 作者姓名： | 宋晓岚 江楠 李宇焜 徐大余 邱冠周 |
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| 作者单位： | Department of Inorganic Materials, School of Resources Processing a~d Bioengineering, Central South University,Changsha 410083, China |
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| 基金项目： | Project supported by the International Cooperation of Science and Technology Ministry PRC （2005DFBA028） and the Nation- al Natural Science Foundation of China （59925412） |
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| 摘 要： | Using cetyltrimethylammonium bromide （CTAB） as the template agent, cerium nitrate as the cerium resource, yttrium nitrate as the yttrium resource, and ammonium carbonate as the precipitating agent, mesoporous CeO2 powders doped with different yttrium contents were successfully synthesized using a chemical precipitation method, under an alkalescent condition. Properties of the obtained samples were characterized and analyzed with X-ray diffraction （XRD）, energy dispersive analysis of X-rays （EDAX）, transmission electron microscopy （TEM）, infrared （IR） absorbance, and the BET method. For the prepared samples with 20% （molar ratio） Y-doped content, a BET specific surface area of 106. 6 m^2 · g^- 1, with an average pore size of3~27 nm were obtained. XRD patterns showed that the doped samples were with a cubic fluorite structure. TEM micrographs revealed that the doped samples showed a spherical morphology with a diameter ranging from 20 to 30 nm and a round pore shape. IR results indicated that the Ce-O-Ce vibration intensity decreased as the Y-doped content increased. N2 adsorption-desorption isotherms showed that the samples possessed typical mesopore characteristics. The average pore size of the samples decreased alter mesoporous CeO2 was doped with yttrium, and the average pore size decreased largely as the Y-doped content increased.
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| 关 键 词： | 二氧化铈 化学沉淀 化学方法 稀土 |
| 文章编号： | 1002-0721（2007）04-0428-06 |
| 收稿时间： | 3 November 2006 |
| 修稿时间： | 2006-11-03 |
Synthesis and Characterization of Y-Doped Mesoporous CeO2 Using A Chemical Precipitation Method |
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| Song Xiaolan,Jiang Nan,Li Yukun,Xu Dayu,Qiu Guanzhou.Synthesis and Characterization of Y-Doped Mesoporous CeO2 Using A Chemical Precipitation Method[J].Journal of Rare Earths,2007,25(4):428-433. |
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| Authors: | Song Xiaolan Jiang Nan Li Yukun Xu Dayu Qiu Guanzhou |
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| Affiliation: | Department of Inorganic Materials, School of Resources Processing and Bioengineering, Central South University, Changsha 410083, China |
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| Abstract: | Using cetyltrimethylammonium bromide (CTAB) as the template agent, cerium nitrate as the cerium resource, yttrium nitrate as the yttrium resource, and ammonium carbonate as the precipitating agent, mesoporous CeO2 powders doped with different yttrium contents were successfully synthesized using a chemical precipitation method, under an alkalescent condition. Properties of the obtained samples were characterized and analyzed with X-ray diffraction (XRD), energy dispersive analysis of X-rays (EDAX), transmission electron microscopy (TEM), infrared (IR) absorbance, and the BET method. For the prepared samples with 20% (molar ratio) Y-doped content, a BET specific surface area of 106.6 m2·g-1, with an average pore size of 3.27 nm were obtained. XRD patterns showed that the doped samples were with a cubic fluorite structure. TEM micrographs revealed that the doped samples showed a spherical morphology with a diameter ranging from 20 to 30 nm and a round pore shape. IR results indicated that the Ce-O-Ce vibration intensity decreased as the Y-doped content increased. N2 adsorption-desorption isotherms showed that the samples possessed typical mesopore characteristics. The average pore size of the samples decreased after mesoporous CeO2 was doped with yttrium, and the average pore size decreased largely as the Y-doped content increased. |
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| Keywords: | mesoporous ceria Y-doped chemical precipitation method synthesis characterization rare earths |
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