Continuous synthesis of magnetite nanoparticles in supercritical methanol

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

Research output: Contribution to journalArticlepeer-review

40 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

Bibliographical note

Funding Information:
This research was supported by Nano R&D program through the Korea Science and Engineering Foundation funded by the Ministry of Education, Science and Technology ( 2008-2002344 ). The authors acknowledge the Korea Research Council of Fundamental Science and Technology (KRCF) and the Korea Institute of Science and Technology (KIST) for ‘National Agenda Program (NAP)’ for additional support.

Keywords

  • Magnetic materials
  • Magnetite
  • Nanomaterials
  • Supercritical methanol

ASJC Scopus subject areas

  • General Materials Science
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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