Influences of different synthesis conditions on properties of Fe₃O₄ nanoparticles

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• 作者：Hao Yan ; Jiancheng Zhang ; Chenxia You ; Zhenwei Song ; Benwei Yu ; Yue Shen
• 关键词：Fe₃O₄ nanoparticles ; Synthesis conditions ; Hydrothermal ; Magnetic
• 刊名：Materials Chemistry and Physics
• 出版年：2009
• 出版时间：15 January 2009
• 年：2009
• 卷：113
• 期：1
• 页码：46-52
• 全文大小：1485 K

文摘

Magnetic nanoparticles of Fe₃O₄ had been fabricated through hydrothermal reaction by using sodium bis(2-ethylhexyl) sulfosuccinate (AOT) as a surfactant and hydrazine hydrate (N₂H₄·H₂O) as a reductant. The influences of different concentrations of AOT and N₂H₄·H₂O on the nanoparticles were investigated; moreover, the different reaction temperatures and time were also analyzed. Their structure and morphology were characterized by X-ray powder diffraction (XRD), high-resolution transmission electron microscopy (HRTEM), selected area electron diffraction (SAED), energy dispersive spectrometer (EDS) and Fourier transform infrared spectroscopy (FT-IR). Furthermore, magnetic properties of the products were studied by vibrating sample magnetometer (VSM). The crystallite size of the samples was calculated using Debye–Scherrer equation. It was found that the as-prepared nanoparticles had been modified by using surfactant during the synthesis process. The amount of AOT and N₂H₄·H₂O, the reaction temperature and time had effects on the size, the dispersal and the magnetic properties of the particles. The well-dispersed magnetic Fe₃O₄ nanoparticles with better size distribution could be prepared at 150 °C for 10 h when the concentrations of AOT and N₂H₄·H₂O were 0.10 M and 20 % (v/v), respectively. Besides, possible mechanisms related to the effects were also discussed.