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

doi:10.1016/j.jallcom.2012.10.150

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

^*Corresponding author for this work

King Fahd University of Petroleum & Minerals

Research output: Contribution to journal › Article › peer-review

76 Scopus citations

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 language	English
Pages (from-to)	395-401
Number of pages	7
Journal	Journal of Alloys and Compounds
Volume	550
DOIs	https://doi.org/10.1016/j.jallcom.2012.10.150
State	Published - 15 Feb 2013

Bibliographical note

Funding Information:
The authors would like to thank Universiti Kebangsaan Malaysia (UKM) for supporting this work through Grants nos.: UKM-AP-NBT-15-2010 and DIP-2012-32 .

Keywords

Nanostructures
Optical properties
Thermal decomposition
XPS
α-FeO

ASJC Scopus subject areas

Mechanics of Materials
Mechanical Engineering
Metals and Alloys
Materials Chemistry

Access to Document

10.1016/j.jallcom.2012.10.150

Cite this

@article{4bb7983c9a1a4f5285801d4964367491,

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

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",

keywords = "Nanostructures, Optical properties, Thermal decomposition, XPS, α-FeO",

author = "R. Al-Gaashani and S. Radiman and N. Tabet and Daud, \{A. R.\}",

note = "Funding Information: The authors would like to thank Universiti Kebangsaan Malaysia (UKM) for supporting this work through Grants nos.: UKM-AP-NBT-15-2010 and DIP-2012-32 .",

year = "2013",

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doi = "10.1016/j.jallcom.2012.10.150",

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journal = "Journal of Alloys and Compounds",

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T1 - Rapid synthesis and optical properties of hematite (α-Fe 2O3) nanostructures using a simple thermal decomposition method

AU - Al-Gaashani, R.

AU - Radiman, S.

AU - Tabet, N.

AU - Daud, A. R.

N1 - Funding Information: The authors would like to thank Universiti Kebangsaan Malaysia (UKM) for supporting this work through Grants nos.: UKM-AP-NBT-15-2010 and DIP-2012-32 .

PY - 2013/2/15

Y1 - 2013/2/15

N2 - 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

AB - 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

KW - Nanostructures

KW - Optical properties

KW - Thermal decomposition

KW - XPS

KW - α-FeO

UR - https://www.scopus.com/pages/publications/84869887899

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DO - 10.1016/j.jallcom.2012.10.150

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VL - 550

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JO - Journal of Alloys and Compounds

JF - Journal of Alloys and Compounds

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