| 纳米CeO2的形貌控制与表征 |
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| 引用本文： | 左晓菲,沈明,马桂林.纳米CeO2的形貌控制与表征[J].中国稀土学报,2006,24(2):247-250. |
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| 作者姓名： | 左晓菲 沈明 马桂林 |
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| 作者单位： | 1. 苏州大学化学化工学院,江苏,苏州,215123
2. 苏州大学化学化工学院,江苏,苏州,215123;扬州大学化学化工学院,江苏,扬州,225002 |
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| 基金项目： | 中国科学院资助项目;苏州大学校科研和校改项目 |
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| 摘 要： | 以Ce(NO3)3·6H2O和(NH4)2CO3为沉淀源,利用柠檬酸作为络合剂和分散剂,实现了对CeO2前驱体的形貌和尺寸控制,并采用TEM,TGA和XRD等方法对前驱体及其热分解所得纳米CeO2的形貌及结晶性等进行了表征.结果表明,随着柠檬酸加入量的提高,前驱体形貌从纳米线向类球形颗粒变化,焙烧生成的纳米CeO2颗粒的形貌具有明显继承性,所得CeO2属于立方萤石结构,且随焙烧温度的提高,晶化程度增大.
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| 关 键 词： | 湿化学方法 共沉淀 柠檬酸 稀土 |
| 文章编号： | 1000-4343（2006）02-0247-04 |
| 收稿时间： | 07 6 2005 12:00AM |
| 修稿时间： | 2005-07-062005-10-30 |
Morphology Control and Characterization of Nanocrystalline CeO2 |
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| Zuo Xiaofei,Shen Ming,Ma Guilin.Morphology Control and Characterization of Nanocrystalline CeO2[J].Journal of the Chinese Rare Earth Society,2006,24(2):247-250. |
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| Authors: | Zuo Xiaofei Shen Ming Ma Guilin |
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| Abstract: | The carbonate precursors with different shapes and sizes were prepared by means of coprecipitation with cerium nitrate as the starting salts, ammonium carbonate as the precipitator and citric acid as the complexing agent and dispersant. Precursors and calcined powders were characterized using TEM, TGA and XRD. The results indicate that the morphology of precursors changes from nanowires to spherical particles with the increase of citric acid. The calcined CeO_2 nanoparticles inherit obviously the morphology of precursors. The as-prepared CeO_2 has the cubic crystal structure of fluorite, and the degree of crystallization increases with roasting temperature. |
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| Keywords: | CeO2 |
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