Pulsed plasma chemical synthesis of Fe 2 O 3 @TiO 2 core–shell nanocomposites

Micro & nano letters

article

Galina Kholodnaya¹  Roman Sazonov¹  Denis Ponomarev¹  Alexander Sivkov¹  Ivan Shanenkov¹  Fedor Konusov¹  Ruslan Gadirov² 

[1] Tomsk Polytechnic University;Siberian Physical-Technical Institute, Tomsk State University

关键词: nanofabrication;    nanoparticles;    iron compounds;    energy gap;    titanium compounds;    transmission electron microscopy;    nanocomposites;    absorption coefficients;    plasma materials processing;    core-shell nanostructures;    crystal morphology;    composite nanoparticles;    titanium oxide nanoparticles;    pulsed plasma chemical synthesis;    core-shell structured nanocomposites;    plasma dynamic method;    composite shell;    TEM;    wall thickness;    absorption coefficient;    interband absorption;    bandgap;    absorption spectra;    morphology;    size 50.0 nm to 150.0 nm;    size 5.0 nm to 10.0 nm;    Fe2O3-TiO2;   

DOI  :  10.1049/mnl.2020.0110

学科分类：计算机科学（综合）

来源: Wiley

【 摘 要 】

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 Fe 2 O 3 @TiO 2 core–shell structured composite nanoparticles using TEM. A distinctive feature of the morphology of the synthesised Fe 2 O 3 @TiO 2 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 Fe 2 O 3 @TiO 2 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 and , respectively.

【 授权许可】

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