Journal of Materials Science

, Volume 48, Issue 6, pp 2365–2369 | Cite as

Facile synthesis of water-soluble and superparamagnetic Fe3O4 dots through a polyol-hydrolysis route

  • Pin Jiang
  • Xi Yang
  • Ying Xin
  • Yongxin Qi
  • Xicheng Ma
  • Qian Li
  • Zhaoliang Zhang
Article

Abstract

Monodisperse Fe3O4 dots with a mean size of about 2.3 nm were successfully synthesized via a polyol-hydrolysis route without adding any dispersant. Inorganic iron nitrate was used as the metal source and triethylene glycol (TEG) was used as the polyol solvent. The Fe3O4 dots were characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM), selective area electron diffraction (SAED), Fourier transform infrared (FTIR) spectroscopy, N2 adsorption–desorption, and magnetization measurements. The as-synthesized Fe3O4 dots can not only be coagulated from the polyol by ethanol and acetone, but also easily redispersed in water by ultrasonication, resulting in a clear Tyndall effect. The obtained Fe3O4 dots exhibited superparamagnetism at room temperature and the saturation magnetization is much lower than those reported in previous works. The formation mechanism of the Fe3O4 dots was proposed to be the hydrolysis of iron nitrates and subsequent dehydration and partial reduction of Fe3+ to Fe2+ at elevated temperatures in TEG.

Keywords

Fe3O4 Polyol Fe3O4 Nanoparticles Metal Source Magnetic Resonance Imaging Contrast Agent 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Notes

Acknowledgements

This work was supported by the National Natural Science Foundation of China (No. 21077043 and 21107030), the Program of the Development of Science and Technology of Shandong Province (No. 2011GGB01178), the State Key Laboratory of Environmental Chemistry and Ecotoxicology, the Research Center for Eco-Environmental Sciences, the Chinese Academy of Sciences (KF2009–13), and the Foundation for Outstanding Young Scientist in Shandong Province (BS2011HZ002).

Supplementary material

10853_2012_7018_MOESM1_ESM.doc (8.2 mb)
Supplementary material 1 (DOC 8392 kb)

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Copyright information

© Springer Science+Business Media New York 2012

Authors and Affiliations

  • Pin Jiang
    • 1
  • Xi Yang
    • 1
  • Ying Xin
    • 1
  • Yongxin Qi
    • 2
  • Xicheng Ma
    • 3
  • Qian Li
    • 1
  • Zhaoliang Zhang
    • 1
  1. 1.School of Chemistry and Chemical EngineeringUniversity of JinanJinanChina
  2. 2.School of Material Science and TechnologyShandong UniversityJinanChina
  3. 3.School of Chemistry and Chemical EngineeringShandong UniversityJinanChina

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