Continuous synthesis of magnetite nanoparticles in supercritical methanol
- Continuous synthesis of magnetite nanoparticles in supercritical methanol
- Bambang Veriansyah; 김재덕; 민병권; 김재훈
- Magnetite; Magnetic materials; Nanomaterials; Supercritical methanol
- Issue Date
- Materials letters
- VOL 64, 2197-2200
- 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.
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