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Electrostatic self-assembly of Fe_3O_4 nanoparticles on carbon nanotubes

机译：Fe_3O_4纳米粒子在碳纳米管上的静电自组装

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摘要

Carbon nanotubes (CNTs)-based magnetic nanocomposites can find numerous applications in nanotechnology, integrated functional system, and in medicine owing to their great potentialities. Herein, densely distributed magnetic Fe_3O_4 nanoparticles were successfully attached onto the convex surfaces of carbon nanotubes (CNTs) by an in situ polyol-medium solvothermal method via non-covalent functionalization of CNTs with cationic surfactant, cetyltrimethylammonium bromide (CTAB), and anionic polyelectrolyte, poly(sodium 4-styrenesulfonate) (PSS), through the polymer-wrapping technique, in which the negatively charged PSS-grafted CNTs can be used as primer for efficiently adsorption of positively metal ions on the basis of electrostatic attraction. X-ray diffractometry (XRD), X-ray photoelectron spectroscopy (XPS) and transmission electron microscopy (TEM) analysis have been used to study the formation of Fe_3O_4/CNTs. The Fe_3O_4/CNTs nanocomposites were proved to be superparamagnetic with saturation magnetization of 43.5 emu g~(-1). A mechanism scheme was proposed to illustrate the formation process of the magnetic nanocomposites.
机译：基于碳纳米管（CNTs）的磁性纳米复合材料由于其巨大的潜力，可以在纳米技术，集成功能系统和医学中找到许多应用。在这里，通过碳纳米管与阳离子表面活性剂，十六烷基三甲基溴化铵（CTAB）和阴离子聚电解质的非共价官能化，通过原位多元醇-介质溶剂热法成功地将密集分布的磁性Fe_3O_4纳米颗粒附着到碳纳米管（CNT）的凸面上聚（4-苯乙烯磺酸钠）（PSS），通过聚合物包裹技术，其中带负电荷的PSS接枝的CNT可用作底漆，可在静电吸引的基础上有效吸附正金属离子。 X射线衍射（XRD），X射线光电子能谱（XPS）和透射电子显微镜（TEM）分析已被用于研究Fe_3O_4 / CNT的形成。 Fe_3O_4 / CNTs纳米复合材料是超顺磁性的，饱和磁化强度为43.5 emu g〜（-1）。提出了机理图来说明磁性纳米复合材料的形成过程。

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  • 来源
    《Applied Surface Science》 |2009年第18期|7999-8002|共4页
  • 作者

    Yong Liu; Wei Jiang; Song Li; Fengsheng Li;

  • 作者单位

    National Special Superfine Powder Engineering Research Center, Nanjing University of Science and Technology, No. 200 Xiaolingwei, Nanjing 210094, PR China;

    National Special Superfine Powder Engineering Research Center, Nanjing University of Science and Technology, No. 200 Xiaolingwei, Nanjing 210094, PR China;

    National Special Superfine Powder Engineering Research Center, Nanjing University of Science and Technology, No. 200 Xiaolingwei, Nanjing 210094, PR China;

    National Special Superfine Powder Engineering Research Center, Nanjing University of Science and Technology, No. 200 Xiaolingwei, Nanjing 210094, PR China;

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  • 原文格式 PDF
  • 正文语种 eng
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  • 关键词

    self-assembling; magnetite; carbon nanotubes; nanocomposites; solvothermal method;

    机译：自组装磁铁矿;碳纳米管;纳米复合材料溶剂热法;

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