Synthesis and Characterization of Monodisperse Iron Oxides Microspheres

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• 作者：Debao Wang ; Caixia Song ; Yihong Zhao ; Maoli Yang
• 刊名：Journal of Physical Chemistry C
• 出版年：2008
• 出版时间：August 21, 2008
• 年：2008
• 卷：112
• 期：33
• 页码：12710-12715
• 全文大小：445K
• 年卷期：v.112,no.33(August 21, 2008)
• ISSN：1932-7455

文摘

Monodisperse α-Fe₂O₃ microspheres of different shapes have been selectively synthesized through the hydrothermal process. The products were characterized by powder X-ray diffraction and scanning electron microscopy. All the α-Fe₂O₃ microspheres have good dispersibility, uniform size, and well-defined shapes. The ferromagnetic investigation of the egg-like α-Fe₂O₃ microspheres gave extremely high coercivity of 3800 Oe at room temperature. The formation mechanism of these microspheres was preliminarily discussed. Nanorods and branched nanorods of a hydroxide precursor Fe₈O₈(OH)₈Cl_1.35 have been captured. Monodisperse Fe₃O₄ microspheres have also been prepared, and their magnetization saturation value is about 40.1 emu/g.