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篇目详细内容 |
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【篇名】 |
Effect of sodium citrate on preparation of nano-sized cobalt particles by organic colloidal process |
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【刊名】 |
Frontiers of Chemistry in China |
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【刊名缩写】 |
Front. Chem. China |
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【ISSN】 |
1673-3495 |
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【EISSN】 |
1673-3614 |
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【DOI】 |
10.1007/s11458-009-0022-y |
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【出版社】 |
Higher Education Press and Springer-Verlag |
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【出版年】 |
2009 |
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【卷期】 |
4
卷2期 |
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【页码】 |
154-159
页,共
6
页 |
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【作者】 |
Huaping ZHU;
Hao LI;
Huiyu SONG;
Shijun LIAO;
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【关键词】 |
sodium citrate; cobalt; organic colloidal process; nano-sized material; complexation |
【摘要】 |
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Nano-sized cobalt particles with the diameter of 2nm were prepared via an organic colloidal process with sodium formate, ethylene glycol and sodium citrate as the reducing agent, the solvent and the complexing agent, respectively. The effects of sodium citrate on the yield, crystal structure, particle size and size distribution of the prepared nano-sized cobalt particles were then investigated. The results show that the average particle diameter decreases from 200nm to 2nm when the molar ratio of sodium citrate to cobalt chloride changes from 0 to 6. Furthermore, sodium citrate plays a crucial role in the controlling of size distribution of the nano-sized particles. The size distribution of the particle without sodium citrate addition is in range from tens of nanometers to 300 or 400nm, while that with sodium citrate addition is limited in the range of (2±0.25)nm. Moreover, it is found that the addition of sodium citrate as a complex agent could decrease the yield of the nano-sized cobalt particle. |
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