Hydrothermal synthesis of superparamagnetic Fe3O4 nanoparticles with ionic liquids as stabilizer

• Published in: Materials research bulletin 2015-02, Vol.62, p.217-221
• Main Authors: Liu, Xiao-Di, Chen, Hao, Liu, Shan-Shan, Ye, Li-Qun, Li, Yin-Ping
• Format: Article
• Language: English
• Subjects: A. Magnetic materials; B. Chemical synthesis; B. Magnetic properties
• ISSN: 0025-5408; 1873-4227
• DOI: 10.1016/j.materresbull.2014.11.022

[Display omitted] •Superparamagnetic Fe3O4 nanoparticles with good dispersity have been synthesized via hydrothermal method.•Ionic liquid [C16mim]Cl acts as stabilizer for the Fe3O4 nanoparticles.•Fe3O4 nanoparticles have a saturation magnetization of 67.69emu/g at 300K. Superparamagnetic Fe3O4 nanoparticles have been successfully synthesized under hydrothermal condition with the assistant of ionic liquid 1-hexadecyl-3-methylimidazolium chloride ([C16mim]Cl). The structure and morphology of the sample have been investigated by X-ray diffraction (XRD), X-ray photoelectron spectra (XPS), transmission electron microscopy (TEM), and high-resolution TEM (HRTEM), and the results indicate that the as-synthesized inverse spinel Fe3O4 nanoparticles have an average diameter of about 10nm and exhibit relatively good dispersity. More importantly, it is found that [C16mim]Cl acts as stabilizer for the Fe3O4 nanoparticles by adsorbing on the particles surfaces to prevent the agglomeration. In addition, the obtained superparamagnetic Fe3O4 nanoparticles have a saturation magnetization of 67.69emu/g at 300K.