Facile synthesis of Fe3O4 nanoparticles by reduction phase transformation from γ-Fe2O3 nanoparticles in organic solvent

Hoang Tri Hai; Hiroaki Kura; Migaku Takahashi; Tomoyuki Ogawa

doi:10.1016/j.jcis.2009.09.041

Facile synthesis of Fe₃O₄ nanoparticles by reduction phase transformation from γ-Fe₂O₃ nanoparticles in organic solvent

Hoang Tri Hai, Hiroaki Kura, Migaku Takahashi, Tomoyuki Ogawa

Research output: Contribution to journal › Article › peer-review

44 Citations (Scopus)

Abstract

A phase transformation induced by the reduction of as-synthesized γ-maghemite (γ-Fe₂O₃) nanoparticles was performed in solution by exploiting the reservoir of reduction gas (CO) generated from the incomplete combustion reaction of organic substances in the reactor. Results from X-ray diffraction, color indicator, and magnetic analysis using a SQUID strongly support this phase transformation. Based on this route, monodisperse magnetite (Fe₃O₄) nanoparticles were simply produced in the range from 260 to 300 °C. Almost all aspects of the original γ-Fe₂O₃ nanoparticles, such as shape, size, and monodispersity, were maintained in the produced Fe₃O₄ nanoparticles.

Original language	English
Pages (from-to)	194-199
Number of pages	6
Journal	Journal of Colloid And Interface Science
Volume	341
Issue number	1
DOIs	https://doi.org/10.1016/j.jcis.2009.09.041
Publication status	Published - 2010 Jan 1

Keywords

Maghemite
Magnetite
Nanoparticles
Phase transformation
Reduction

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Biomaterials
Surfaces, Coatings and Films
Colloid and Surface Chemistry

Access to Document

10.1016/j.jcis.2009.09.041

Cite this

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title = "Facile synthesis of Fe3O4 nanoparticles by reduction phase transformation from γ-Fe2O3 nanoparticles in organic solvent",

abstract = "A phase transformation induced by the reduction of as-synthesized γ-maghemite (γ-Fe2O3) nanoparticles was performed in solution by exploiting the reservoir of reduction gas (CO) generated from the incomplete combustion reaction of organic substances in the reactor. Results from X-ray diffraction, color indicator, and magnetic analysis using a SQUID strongly support this phase transformation. Based on this route, monodisperse magnetite (Fe3O4) nanoparticles were simply produced in the range from 260 to 300 °C. Almost all aspects of the original γ-Fe2O3 nanoparticles, such as shape, size, and monodispersity, were maintained in the produced Fe3O4 nanoparticles.",

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author = "Hai, {Hoang Tri} and Hiroaki Kura and Migaku Takahashi and Tomoyuki Ogawa",

note = "Funding Information: This work was supported by the Japan Society for the Promotion of Science (JSPS) and in part by the Research and Development of Nanodevices for Practical Unitization of Nanotechnology Project in 2008 from NEDO of Japan. ",

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AU - Kura, Hiroaki

AU - Takahashi, Migaku

AU - Ogawa, Tomoyuki

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