Preparation and magnetic properties of magnetite nanoparticles

Preparation and magnetic properties of magnetite nanoparticles
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磁铁矿纳米粒子的制备及其磁性能

DOI:
10.1016/j.matlet.2011.09.116
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发表时间:
2012-02
期刊:
影响因子:
3
通讯作者:
Feng, Lingyun
Feng, Lingyun
中科院分区:
材料科学3区
文献类型:
--
作者:
Zhao, Fangyuan;Zhang, Baolin;Feng, Lingyun

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用Fe(Acac)3在聚乙二醇醚中的热分解法制备了平均粒径为9.5±1.7 nm的水溶性超顺磁性Fe3O4纳米粒子。在该反应中,使用了聚乙二醇单甲醚作为溶剂、还原剂和修饰剂。这种方法的一个明显的优点是不需要进一步的还原剂和表面活性剂。用粉末X射线衍射仪、透射电子显微镜和傅里叶变换红外光谱对产物进行了表征。利用超导量子干涉装置对其磁性能进行了评价。升温过程影响磁铁矿(Fe3O4)纳米粒子的大小和尺寸分布。提出了Fe3O4纳米颗粒的形成机理,解释了磁性纳米颗粒的形成机理。
Water-soluble superparamagnetic Fe3O4nanoparticles with an average diameter of 9.5±1.7nm were synthesized by thermal decomposition of Fe(acac)3in MPEG. MPEG was used as solvent, reducing agent, and modifying agent in this reaction. An obvious advantage of this approach is that no further reducing agent and surfactants are required. The products were characterized by powder X-ray diffraction, transmission electron microscopy and fourier transform infrared spectroscopy. The magnetic properties were evaluated using a superconducting quantum interference device. The elevating temperature procedures influence the sizes and the size distribution of the magnetite (Fe3O4) nanoparticles. A tentative mechanism of the formation of Fe3O4nanoparticles is proposed to explain the formation of the magnetite nanoparticles.
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