Continuous synthesis of magnetite nanoparticles in supercritical methanol

Title
Continuous synthesis of magnetite nanoparticles in supercritical methanol
Authors
Bambang Veriansyah김재덕민병권김재훈
Keywords
Magnetite; Magnetic materials; Nanomaterials; Supercritical methanol
Issue Date
2010-07
Publisher
Materials letters
Citation
VOL 64, 2197-2200
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-Fe2O3) 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.
URI
http://pubs.kist.re.kr/handle/201004/37778
ISSN
0167-577X
Appears in Collections:
KIST Publication > Article
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