Synthesis and Growth of Rodlike and Spherical Nanostructures CoSb3 via Ethanol Sol–Gel Method

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• 作者：Ying Chu ; Xinfeng Tang ; Wenyu Zhao ; Qingjie Zhang
• 刊名：Crystal Growth & Design
• 出版年：2008
• 出版时间：January 2008
• 年：2008
• 卷：8
• 期：1
• 页码：208 - 210
• 全文大小：517K
• 年卷期：v.8,no.1(January 2008)
• ISSN：1528-7505

文摘

The synthesis and growth of rodlike and spherical nanostructures of CoSb₃ compounds using an ethanol sol–gel method are reported. The characterization results indicate that the molar ratios of Sb/Co and C₆H₈O₇/Co affect the phase composition, and only when Sb/Co = 6 and C₆H₈O₇/Co = 4, the obtained powder is a single-phase CoSb₃ compound. The crystalline morphology of CoSb₃ compounds is composed of spherical nanostructures about 50 nm in diameter and nanorods about 30 nm in diameter and 100−200 nm in length. Transmission electron microscopy (TEM) and selected area electron diffraction (SAED) prove that nanorods grow along the [110] direction. The rodlike CoSb₃ compound is ultimately produced due to the differences in growth rates between the crystal faces. The formation of a carbonyl coordination compound Co₂(CO)₈ between the Co atoms reduced by H₂ and the CO formed by citric acid decomposition causes the differences in the growth rate. In the local spaces without CO, the CoSb₃ nuclei become spherical.