- Title
- Structural and optical properties of sol-gel derived α-Fe2O3 nanoparticles
- Creator
- Mathevula, Langutani E, Noto, L L, Mothudi, Bakang M, Chithambo, Makaiko L, Dhlamini, M S
- Date
- 2017
- Type
- text
- Type
- article
- Identifier
- http://hdl.handle.net/10962/115467
- Identifier
- vital:34145
- Identifier
- DOI: 10.1016/j.jlumin.2017.07.055
- Description
- α-Fe2O3 nanoparticles of crystallite size between 3.9 and 9.5 nm were synthesized by a simple sol-gel method using iron (III) nitrate nonahydrate (Fe(NO3)3·9H2O) as a precursor. Polyvinyl alcohol (PVA) was added as a capping agent to avoid agglomeration of the nanoparticles. A single pure phase was obtained when the sample was annealed at 300 °C and 600 °C. The purity was further confirmed with the Fourier Transform Infrared Spectroscopy. The energy band gap of the materials was extrapolated from the Kubelka-Munk relation and it ranges between 1.8 and 2.3 eV. The Photoluminescence of the 3 samples shows a broad emission spectrum centered at about 422 nm when excited by a 336 nm lamp. The emission peaks intensities increased with an increase in the annealing temperature, accept for the 576 nm peak, which was quenched as the temperature increased from 300 °C to 600 °C. The thermoluminescence glow curves were carried out at different heating rates and the samples were exposed to different beta particle doses (82–1315 Gy). The activation energy of the trapped electrons was determined.
- Format
- 9 pages, pdf
- Language
- English
- Relation
- Journal of Luminescence, Mathevula, L.E., Noto, L.L., Mothudi, B.M., Chithambo, M. and Dhlamini, M.S., 2017. Structural and optical properties of sol-gel derived α-Fe2O3 nanoparticles. Journal of Luminescence, 192, pp.879-887., Journal of Luminescence volume 192 879 887 December 2017 0022-2313
- Rights
- Elsevier
- Rights
- Use of this resource is governed by the terms and conditions of the Science Direct Terms and Conditions Statement (https://www.elsevier.com/legal/elsevier-website-terms-and-conditions)
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RU Department of Physics and Electronics
Chithambo, Makaiko Liwiro (Distinguished Prof)
SDG 09. Industry, Innovation and Infrastructure
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