Pulsed plasma chemical synthesis of Fe 2 O 3 @TiO 2 core–shell nanocomposites
Autor: | Ruslan M. Gadirov, Galina Kholodnaya, Alexander Sivkov, Roman Sazonov, Ivan Shanenkov, Denis Ponomarev, F. V. Konusov |
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Rok vydání: | 2020 |
Předmět: |
Nanocomposite
Materials science Absorption spectroscopy Composite number Biomedical Engineering Analytical chemistry Iron oxide Nanoparticle Bioengineering 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences 0104 chemical sciences Titanium oxide chemistry.chemical_compound chemistry Attenuation coefficient General Materials Science 0210 nano-technology Absorption (electromagnetic radiation) |
Zdroj: | Micro & Nano Letters. 15:709-712 |
ISSN: | 1750-0443 |
Popis: | The Letter presents the results of the experimental investigation on the synthesis of core–shell structured nanocomposites. Iron oxide, which served as a nucleus in the composite, was synthesised using the plasma dynamic method. The composite shell was titanium oxide produced by the pulsed plasma chemical method. Average sizes of nanoparticles were estimated between 50 and 150 nm in the Fe2O3@TiO2 core–shell structured composite nanoparticles using TEM. A distinctive feature of the morphology of the synthesised Fe2O3@TiO2 core–shell is that the core entirely encapsulates clusters of titanium oxide nanoparticles. The wall thickness of the coating is 5–10 nm. The spectral dependence of the absorption coefficient α(hν) was calculated for the Fe2O3@TiO2 composite. The interband absorption parameters are determined in the energy intervals Δ′(hν) upon approximation of the absorption spectra. The bandgap for indirect and direct allowed transitions is 1.36 and 1.97 eV for E g ′ ′ and E g ′ , respectively. |
Databáze: | OpenAIRE |
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