Well-defined SiO2-coated Fe2Co nanoparticles prepared by reduction with CaH2

Well-defined SiO2-coated Fe2Co nanoparticles prepared by reduction with CaH2
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CaH2 还原制备明确的 SiO2 包覆 Fe2Co 纳米颗粒

DOI:
10.1039/c5ra20306f
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发表时间:
2015
期刊:
影响因子:
3.9
通讯作者:
S. Yamamoto and M. Tsujimoto
S. Yamamoto and M. Tsujimoto
中科院分区:
化学3区
文献类型:
--
作者:
S.Yamamoto;Y.Kusano;S. Yamamoto and M. Tsujimoto

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通过将CoFe2O4纳米粒子与CaH2还原,成功制备了性能良好的CoFe2O4纳米粒子。使用CaH2降低还原温度是保持初始纳米颗粒完整的良好形态的必要条件。使用具有COOH基团的硅烷偶联剂进行表面改性,可以获得优异的水分散性,从而通过EDC/NHS化学等成熟的过程促进随后与各种分子的功能化。所获得的二氧化硅包覆的Fe2Co纳米颗粒具有可控的形态、耐蚀性、软磁性能和易于后功能化的特点,有望成为电磁、生物和医学应用的基石。
Well-defined SiO2-coated Fe2Co nanoparticles have been successfully prepared by the reduction of SiO2-coated CoFe2O4 nanoparticles with CaH2. Lowering the reducing temperature by using CaH2 is essential to keep the well-defined morphology of the starting nanoparticles intact. Surface modification with a silane coupling agent which has COOH groups has led to excellent aqueous dispersibility that facilitates subsequent functionalization with a variety of molecules via well-established processes such as EDC/NHS chemistry. The obtained SiO2-coated Fe2Co nanoparticles equipped with controlled morphology, corrosion resistivity, soft magnetic properties, and easy post-functionalization are expected to serve as a building block for electromagnetic, biological, and medical applications.
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