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Shape-controlled synthesis of magnetic Fe3O4 nanoparticles with different iron precursors and capping agents

机译：用不同铁前体和封端剂的磁Fe3O4纳米粒子的形状控制合成

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摘要

This paper describes a modified method to prepare monodisperse Fe3O4 magnetic nanoparticles with different shapes (cube, octahedron, and sphere). The shape of the magnetic nanoparticles could be conveniently controlled by changing the types of precursor/capping agent and concentration of capping agent. The prepared samples were characterized using scanning electron microscopy, X-ray diffraction and vibrating sample magnetometry. Cubes and octahedra were formed using ferrous sulfate heptahydrate as an iron source, ethylene glycol as a solvent and potassium hydroxide (KOH) as a capping agent while spheres were formed by using ferric chloride hexahydrate as an iron source, ethylene glycol as a solvent and ammonium acetate as a capping agent. By varying KOH concentration (0.5M, 1 M, 1.5 M, and 5 M), the shape was transformed from cubes to octahedra because octahedra are developed dominantly at higher concentration of KOH within the reaction mixture. The magnetic studies show superparamagnetic behavior for all samples at room temperature. The Fe3O4 nanoparticles show the magnetic saturation values of 87 emu g(-1), 85 emu g(-1), and 82 emu g(-1) for spheres, cubes, and octahedrons, respectively.
机译：本文描述了一种改进的方法，用于制备具有不同形状（立方体，八面体和球）的单分散Fe3O4磁性纳米颗粒。可以通过改变前体/覆盖剂的类型和封端剂的浓度来方便地控制磁性纳米颗粒的形状。使用扫描电子显微镜，X射线衍射和振动样品磁度测定，表征制备的样品。使用硫酸硫酸亚硫酸盐，作为铁源，作为溶剂和氢氧化钾（KOH）作为封端剂而形成的立方体和八面体形成，而通过使用氯化铁六水合物作为铁源，乙二醇作为溶剂和铵形成球体。作为封端剂乙酸盐。通过不同的koh浓度（0.5m，1m，1.5m和5米），因此从多维数据集转化为八蒲叶，因为八面体在反应混合物中以较高浓度的KOH显着显着。磁性研究显示了室温下所有样品的超顺磁性行为。 Fe3O4纳米颗粒分别显示出球体，立方体和八面体的87 emu g（-1），85 emu g（-1）和82 emu g（-1）的磁饱和度值。

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  • 来源
    《RSC Advances》 |2018年第41期|共7页
  • 作者

    Fatima Hira; Lee Dae-Won; Yun Hyun Joong; Kim Kyo-Seon;

  • 作者单位

    Kangwon Natl Univ Dept Chem Engn Chunchon 200701 Kangwon Do South Korea;

    Kangwon Natl Univ Dept Chem Engn Chunchon 200701 Kangwon Do South Korea;

    Kangwon Natl Univ Dept Chem Engn Chunchon 200701 Kangwon Do South Korea;

    Kangwon Natl Univ Dept Chem Engn Chunchon 200701 Kangwon Do South Korea;

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  • 正文语种 eng
  • 中图分类 化学;
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