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 journalArticlepeer-review

41 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 languageEnglish
Pages (from-to)194-199
Number of pages6
JournalJournal of Colloid And Interface Science
Volume341
Issue number1
DOIs
Publication statusPublished - 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

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