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Synthesis of monodispersed cubic magnetite particles through the addition of small amount of Fe into Fe(OH)2 suspension
Authors:Feng Dang  Naoya Enomoto  Junichi Hojo  Keiji Enpuku
Institution:1. National Institute of Advanced Industrial Science and Technology (AIST), 2266-98 Anagahora, Shimoshidami, Moriyama-ku, Nagoya 463-8560, Japan;2. Department of Applied Chemistry, Faculty of Engineering, Kyushu University, Fukuoka 819-0395, Japan;3. Research Institute of Superconductor Science and Systems, Kyushu University, Fukuoka 819-0395, Japan
Abstract:Magnetite particles were synthesized through a process including dissolution of Fe(OH)2 and precipitation of an oxidized phase in aqueous solution. The Fe3+ ion was added at the beginning of the synthesis to accelerate the formation of magnetite, control the particle size and improve the monodispersibility. It was found that the addition of Fe3+ ion affected the nucleation and the formation of magnetite particles significantly. Magnetite nanoparticles with small particle size and narrow size distribution were obtained. Furthermore, high magnetic properties were obtained in small particle size. The particle size and magnetic properties increased through the increase of Fe2+/Fe3+ ratio.
Keywords:A1  Crystal morphology  A1  Nanostructures  A2  Growth from solutions  B1  Nanomaterials  B2  Magnetic materials
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