| 共沉淀法和模板法制备均匀负载CeO2/ SiO2的研究 |
| Study on Uniformly Supported Structure of CeO2/SiO2 Prepared by Coprecipitation and Surfactant-assisted Method |
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| 摘要: |
| 关键词: CeO2 /SiO2 均匀负载 共沉淀法 模板法 |
| 基金项目: |
| Abstract: XRD, Raman, TEM, and N2-adsorption were utilized to characterize CeO2/SiO2 prepared by coprecipitation and surfactant-assisted method. The results show that nanocrystalline CeO2 can be uniformly supported on the surface of SiO2 particles, when the molar ratio of Si4+/(Ce3++Si4+) is less than 35% in coprecipitation samples. At higher Si content, the surface of SiO2 can not be fully covered by CeO2. With surfactant (CTAB) added, the uiformly supported structure can even exist when the molar ratio of Si4+/(Ce3++Si4+) is as high as 53%. It is because Ce and Si complexes can be well dispersed in precursor solution in present of CTAB. However, the uniformly supported structure can not be synthesised through surfactant-assisted approch for its hydrothermal threatment, which can easily lead to separate aggregation of nanocrystalline CeO2 and SiO2 particles. |
| Keywords: CeO2/SiO2 uniformly supported structure coprecipitation surfactant-assisted method |
| 投稿时间：2005-03-28 修订日期：2005-05-27 |
| 摘要点击次数: 1719 |
| 全文下载次数: 1805 |
| 杨栋,文明芬,宋崇立,陈靖,顾永万.共沉淀法和模板法制备均匀负载CeO2/ SiO2的研究[J].无机化学学报,2005,21(11):1705-1709. |
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