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化学学报
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化学学报 ›› 2007, Vol. 65 ›› Issue (13): 1273-1279. 上一篇    下一篇

研究论文

Fe3O4磁性纳米粒子的超声包金及其表征

吴伟1, 贺全国*,1, 陈洪1,2, 汤建新1, 聂立波1   

  1. (1湖南工业大学绿色包装与生物纳米技术应用实验室 株洲 412008)
    (2中南林业科技大学生命科学与技术学院 长沙 410004)
  • 投稿日期:2006-11-21 修回日期:2007-01-23 发布日期:2007-07-14
  • 通讯作者: 贺全国

Sonochemical Gold Coating of Fe3O4 Nanoparticles and Its Characterizations

WU Wei1; HE Quan-Guo*,1; CHEN Hong1,2; TANG Jian-Xin1; NIE Li-Bo1   

  1. (1 Green Packaging and Biological Nanotechnology Laboratory, Hunan University of Technol-ogy, Zhuzhou 412008)
    (2 College of Life Science and Technology, Central South University of Forestry & Technology, Changsha 410004)
  • Received:2006-11-21 Revised:2007-01-23 Published:2007-07-14
  • Contact: HE Quan-Guo

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超声条件下, 在乙醇分散的3-氨丙基三乙氧基硅烷(APTES)功能化的磁性Fe3O4纳米粒子和四氯合金酸的混合溶液中滴加柠檬酸钠, 成功地制备了磁性Fe3O4/Au复合纳米粒子. 采用X射线粉末衍射仪(XRD)、紫外吸收可见光谱(UV-Vis)、带有电子能谱仪(EDS)的扫描电子显微镜(SEM)、透射电子显微镜(TEM)、光电子能谱(XPS)、超导量子干涉仪(SQUID)等方法, 对复合粒子的形态、结构、组成以及磁学性质进行了表征. 结果表明: 在此条件下制得的复合粒子粒径在30 nm左右, 室温下磁化强度可达63 emu/g.

关键词: Fe3O4/Au磁性纳米粒子, 包金, 超声合成, 表面修饰, 磁学性能, 四氧化三铁

Air-stable nanoparticles Fe3O4/Au have been prepared via sonolysis of a solution of hydrogen tetrachloroaureate(III) trihydrate (HAuCl4) and (3-aminopropyl)triethoxysilane (APTES)-coated Fe3O4 nanoparticles with further drop-addition of sodium citrate. The Fe3O4/Au nanoparticles have been characterized by X-ray powder diffraction (XRD), ultraviolet-visible spectroscopy (UV-Vis), scanning elec-tron microscopy (SEM) with the energy dispersive spectroscopy (EDS), transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS) and superconducting quantum interference device (SQUID) magnetometry. Fe3O4/Au nanoparticles obtained under appropriate conditions possess a very high saturation magnetization of about 63 emu•g－1, and their average diameter was about 30 nm.

Key words: Fe3O4/Au magnetic nanoparticle, gold coating, sonochemical synthesis, surface modification, magnetic property, magnetite