Wet Chemical Synthesis and a Combined X-ray and M枚ssbauer Study of the Formation of FeSb2 Nanoparticles

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• 作者：Christina S. Birkel ; Gregor Kieslich ; Dimitrios Bessas ; Tania Claudio ; Robert Branscheid ; Ute Kolb ; Martin Panth枚fer ; Rapha毛l P. Hermann ; Wolfgang Tremel
• 刊名：Inorganic Chemistry
• 出版年：2011
• 出版时间：November 21, 2011
• 年：2011
• 卷：50
• 期：22
• 页码：11807-11812
• 全文大小：901K
• 年卷期：v.50,no.22(November 21, 2011)
• ISSN：1520-510X

文摘

Understanding how solids form is a challenging task, and few strategies allow for elucidation of reaction pathways that are useful for designing the synthesis of solids. Here, we report a powerful solution-mediated approach for formation of nanocrystals of the thermoelectrically promising FeSb₂ that uses activated metal nanoparticles as precursors. The small particle size of the reactants ensures minimum diffusion paths, low activation barriers, and low reaction temperatures, thereby eliminating solid鈥搒olid diffusion as the rate-limiting step in conventional bulk-scale solid-state synthesis. A time- and temperature-dependent study of formation of nanoparticular FeSb₂ by X-ray powder diffraction and iron-57 M枚ssbauer spectroscopy showed the incipient formation of the binary phase in the temperature range of 200鈥?50 掳C.