| CeO2纳米粒子的自组装结构合成、表征及催化特性 |
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| 引用本文： | 张亚辉,齐兴义,郭林,张琦.CeO2纳米粒子的自组装结构合成、表征及催化特性[J].北京航空航天大学学报,2004,30(10):1021-1024. |
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| 作者姓名： | 张亚辉 齐兴义 郭林 张琦 |
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| 作者单位： | 北京航空航天大学,材料科学与工程学院,北京,100083;北京航空航天大学,材料科学与工程学院,北京,100083;北京航空航天大学,材料科学与工程学院,北京,100083;北京航空航天大学,材料科学与工程学院,北京,100083 |
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| 摘 要： | 利用微乳液方法(以AOT为表面活性剂)自组装合成了叶脉状结构的CeO2(氧化铈)纳米粒子;使用X射线衍射仪(XRD)、透射电子显微镜(TEM)、括展X射线精细结构(EXAFS)对其进行了研究表征;并对其催化特性进行了测试. XRD结果表明CeO2纳米粒子为立方面心结构;EXAFS结果表明与体相CeO2微粒相比,Ce－O键长变长,Ce原子周围O原子配位数降低;催化特性研究结果表明,相对于体相材料,CeO2纳米微粒的催化分解H2O2的活性大大提高.
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| 关 键 词： | 氧化铈 合成 微乳液 自组装结构 |
| 文章编号： | 1001-5965(2004)10-1021-04 |
| 收稿时间： | 2004-04-28 |
| 修稿时间： | 2004年4月28日 |
Self-assembly structure of CeO2 nanoparticles: synthesis, characterization and catalytic property |
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| Zhang Yahui,Qi Xingyi,Guo Lin,Zhang Qi.Self-assembly structure of CeO2 nanoparticles: synthesis, characterization and catalytic property[J].Journal of Beijing University of Aeronautics and Astronautics,2004,30(10):1021-1024. |
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| Authors: | Zhang Yahui Qi Xingyi Guo Lin Zhang Qi |
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| Institution: | School of Materials Science and Engineering, Beijing University of Aeronautics and Astronautics, Beijing 100083, China |
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| Abstract: | A new approach to synthesis of self-assembly CeO 2 nanoparticles by using microemulsion method was investigated. The structure of the product was characterized by the methods of X-ray diffraction (XRD), transmission electron microscopy (TEM), and extended X-ray absorption fine structure (EXAFS). XRD result indicates the face-center cubic(FCC) structure of the produced CeO 2 nanoparticles. EXAFS shows that the oxygen coordination number around Ce in CeO 2 nanoparticles decrease compared with the bulk CeO 2, and the bond-length of Ce-O in CeO 2 nanoparticles is obviously longer than that of bulk materials. The catalytic property of CeO 2 on the decomposition of H 2O 2 was investdigated, and the results demonstrate that CeO 2 nanoparticles have much stronger catalytic activity than bulk CeO 2. |
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| Keywords: | cerium oxide synthesis microemulsion self-assembly structure |
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