Pulsed plasma chemical synthesis of Fe2O3@TiO2 core–shell nanocomposites

Galina Kholodnaya; Roman Sazonov; Denis Ponomarev; Alexander Sivkov; Ivan Shanenkov; Fedor Konusov; Ruslan Gadirov

Pulsed plasma chemical synthesis of Fe₂O₃@TiO₂ core–shell nanocomposites

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Author(s): Galina Kholodnaya¹ ; Roman Sazonov¹ ; Denis Ponomarev¹ ; Alexander Sivkov¹ ; Ivan Shanenkov¹ ; Fedor Konusov¹ ; Ruslan Gadirov²
- Affiliations: 1: Tomsk Polytechnic University , 30 Lenin Avenue, Tomsk , Russia ;
  2: Siberian Physical-Technical Institute, Tomsk State University , 1 Novosobornaya Sq., Tomsk , Russia
Source: Volume 15, Issue 10, 19 August 2020, p. 709 – 712
DOI: 10.1049/mnl.2020.0110 , Online ISSN 1750-0443

Received 21/02/2020, Accepted 31/05/2020, Revised 14/05/2020, Published 19/08/2020

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.

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Pulsed plasma chemical synthesis of Fe₂O₃@TiO₂ core–shell nanocomposites

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