J. Mater. Sci. Technol. ›› 2009, Vol. 25 ›› Issue (01): 69-72.

• Letters • 上一篇    下一篇

Salt-assisted Low Temperature Solid State Synthesis of High Surface Area CoFe2O4 Nanoparticles

秦润华1;2);李凤生1);姜炜1);刘梨1)   

  1. 1. 南京理工大学国家特种超细粉体工程技术研究中心；中北大学物理系
    2. 南京理工大学国家特种超细粉体工程技术研究中心
  • 收稿日期:2007-12-05 出版日期:2009-01-28 发布日期:2009-10-10
  • 通讯作者: 秦润华
  • 基金资助:

    国家自然科学基金

Salt-assisted Low Temperature Solid State Synthesis of High Surface Area CoFe2O4 Nanoparticles

Runhua Qin1;2)†, Fengsheng Li1), Wei Jiang1) and Li Liu1)   

  1. 1) National Special Superfine Powder Engineering Research Center, Nanjing University of Science and Technology,
    Nanjing 210094, China
    2) Department of Physics, North University of China, Taiyuan 030051, China
  • Received:2007-12-05 Online:2009-01-28 Published:2009-10-10

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摘要：

提出了一种新颖的制备高比表面CoFe2O4纳米粒子的方法——盐助低温固相反应法。该法以CoCl2•6H2O，FeCl3•6H2O和NaOH为前驱体，以NaCl作为分散剂。通过XRD、TEM、VSM和比表面积(BET)分析，研究了NaCl加入摩尔比和煅烧温度对产物性质的影响。结果表明反应前驱体中惰性无机盐NaCl的引入，阻止了新生成纳米粒子的团聚和烧结，从而得到了高分散性CoFe2O4纳米粒子，产物比表面由28.28m2/g增加到73.97m2/g，其饱和磁感应强度达到84.6emu/g。

关键词: 低温固相反应, 盐助, 钴铁氧体, 纳米粒子

Abstract:

A novel salt-assisted low temperature solid state method using CoCl2?6H2O, FeCl3?6H2O and NaOH as pre- cursor and using NaCl as a dispersant to synthesize high surface area CoFe2O4 nanoparticles, has been investigated. The effects of the molar ratio of added salt and calcination temperature on the characteristics of the products were investigated by X-ray diffraction (XRD), transmission electron microscopy (TEM), vibrating sample magnetometer (VSM) and Brunauer, Emmett and Teller (BET) surface area analysis. Results showed that the introduction of leachable inert inorganic salt as a hard agglomeration inhibitor in the mixture precursor led to the formation of high dispersive CoFe2O4 nanoparticles; and the increase in specific surface area from 28.28 to 73.97 m2/g, and the saturation magnetization is 84.6 emu/g.

Key words: Low temperature solid state reaction, Salt-assisted, Cobalt ferrite, Nanoparticles