Rapid synthesis of monodispersed α-Fe2O3 nanoparticles from Fe(NO3)3 solution by microwave irradiation

Hiroaki Katsuki, Atsunori Shiraishi, Sridhar Komarneni, Wan Jin Moon, Shoichi Toh, Kenji Kaneko

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25 Scopus citations

Abstract

Monodispersed α-Fe2O3 nanoparticles were prepared at 100°, 120°, and 140°C using 0.02, 0.05, and 0.1 M-Fe(NO3)3-9H2O solutions by microwave-hydrothermal (M-H) and conventional-hydrothermal(C-H) reactions. Compared to the formation of monodispersed α-Fe2O3 particles using the C-H reaction, the M-H reaction led to increased rate of formation by 3 times at 120°C and 5 times at 140°C from 0.1 M-Fe(NO 3)3 solutions. α-Fe2O3 nanoparticles of 23-25 nm in diameter were obtained from 0.02 M solution at 100°C after treatment for 4 h by applying microwaves, which led to the formation of smaller sized particles with a narrow particle size distribution. The coagulation of nano-sized single crystals of 5 to 6 nm in diameter was enhanced by increasing the concentration of Fe(NO3)3 solutions.

Original languageEnglish (US)
Pages (from-to)384-387
Number of pages4
JournalJournal of the Ceramic Society of Japan
Volume112
Issue number1307
DOIs
StatePublished - Jul 2004

All Science Journal Classification (ASJC) codes

  • Ceramics and Composites
  • Chemistry(all)
  • Condensed Matter Physics
  • Materials Chemistry

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