Continuous synthesis of magnetite nanoparticles in supercritical methanol

Bambang Veriansyah, Jae Duck Kim, Byoung Koun Min, Jaehoon Kim

Research output: Contribution to journalArticle

37 Citations (Scopus)

Abstract

Magnetite (Fe3O4) nanoparticles are synthesized continuously in supercritical methanol (scMeOH) without using reducing agents at 30 MPa, 400 °C and a residence time of 38 s. XRD analysis reveals that particles synthesized in scMeOH retain magnetite crystalline structure while particles synthesized in supercritical water retain hematite (α-Fe 2O3) crystalline structure. The scMeOH acts both as a reaction medium and a reducing agent. The magnetite nanoparticles are spherical in shape with an average diameter of 21 ± 2 nm, as measured using SEM and TEM. The saturation magnetization of the magnetite nanoparticle is 76.6 emu/g. Crown

Original languageEnglish
Pages (from-to)2197-2200
Number of pages4
JournalMaterials Letters
Volume64
Issue number20
DOIs
Publication statusPublished - 2010 Oct 31

Keywords

  • Magnetic materials
  • Magnetite
  • Nanomaterials
  • Supercritical methanol

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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