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

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

Research output: Contribution to journalArticle

26 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
Externally publishedYes

Fingerprint

Hematite
Nanostructures
Pyrolysis
Optical properties
Hydrates
Field emission
Nitrates
Powders
Temperature
Semiconductor quantum dots
Energy dispersive spectroscopy
Energy gap
Iron
X ray photoelectron spectroscopy
Transmission electron microscopy
X ray diffraction
Scanning electron microscopy
Air
ferric oxide

Keywords

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

ASJC Scopus subject areas

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

Cite this

Rapid synthesis and optical properties of hematite (α-Fe 2O3) nanostructures using a simple thermal decomposition method. / Al-Gaashani, R.; Radiman, S.; Tabet, Nouar; Daud, A. R.

In: Journal of Alloys and Compounds, Vol. 550, 15.02.2013, p. 395-401.

Research output: Contribution to journalArticle

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