Rapid synthesis and optical properties of hematite (α-Fe 2O3) nanostructures using a simple thermal decomposition method

R. Al-Gaashani, S. Radiman, N. Tabet, A. R. Daud

Research output: Contribution to journalArticle

29 Citations (Scopus)

Abstract

Hematite nanostructures were prepared by a simple technique using the thermal decomposition of iron (III) nitrate 9-hydrate at different temperatures under air atmosphere. Observations using field emission scanning electron microscopy (FESEM) and transmission electron microscopy (TEM) showed that the morphology of the nanostructures changed as the temperature was varied while their size increased with increasing preparation time. Samples prepared at 300, 400, and 500 °C were made of particles with a quantum dots (QDs) size. X-ray photoelectron spectroscopy (XPS), energy dispersive spectroscopy (EDS) and X-ray diffraction (XRD) confirmed that the as-synthesized powders are pure α-Fe2O3. The optical energy gap of the samples varied from 3.2 eV to 2.7 eV as the preparation temperature increased from 300 °C to 600 °C. Crown

Original languageEnglish
Pages (from-to)395-401
Number of pages7
JournalJournal of Alloys and Compounds
Volume550
DOIs
Publication statusPublished - 15 Feb 2013

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Keywords

  • Nanostructures
  • Optical properties
  • Thermal decomposition
  • XPS
  • α-FeO

ASJC Scopus subject areas

  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys
  • Materials Chemistry

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