乙醇Sol-Gel法制备棒状CoSb3化合物纳米粉体的研究
首发时间:2007-03-08
摘要:本文探索出一种新的制备方钴矿纳米粉体的方法――乙醇Sol-Gel法合成出了棒状CoSb3化合物纳米粉体,并对其生长机理进行了研究。结果表明,Sb/Co 和C6H8O7/Co的摩尔比对粉体的相组成有重要影响,当Sb/Co=6 和C6H8O7/Co=4时得到单相CoSb3纳米化合物。单相CoSb3晶体的微观形貌是由直径为~50 nm的颗粒状及直径为~30 nm、长为100 ~200 nm 的纳米棒构成,选区电子衍射表明棒状晶体沿着[110]方向生长。被H2还原的Co原子与柠檬酸分解出的CO形成羰基配合物,使各晶面生长速度的差异变大,最终形成了棒状的CoSb3晶体。
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Synthesis of rod-like Nanostructure CoSb3 by ethanol Sol-Gel method
Abstract:The rod-like nanostructure CoSb3 compound was synthesized by ethanol Sol-Gel method and their growth mechanics were investigated. The results indicate that the molar ratios of Sb/Co and C6H8O7/Co effect the phase constitutes and only when Sb/Co=6 and C6H8O7/Co=4 the obtained product was single phase CoSb3 compound. Crystalline morphology of CoSb3 compounds are composed of spherical about 50 nm in diameter and nano-rod about 30 nm in diameter and 100~200 nm in length. Transmission Electron Microscopy (TEM) and Selected Area Electron Diffraction (SAED) prove that nano-rod is the single crystal CoSb3 compound and grows along the [110] direction. The rod-like CoSb3 compound produces ultimately due to the difference of growth rate increasing among crystal planes. It is the formation of carbonyl coordination compound Co2(CO)8 between the Co atoms reduced by H2 and CO decomposed by citric acid that the difference of growth rate increases.
Keywords: Nanostructure CoSb3 ethanol Sol-Gel method nanorod-like
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