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The increase in the photocatalytic activity of titanium dioxide TiO2 by creation of composites with perovskite-type semiconductors is an urgent problem in semiconductor photocatalysis technology. For the formation of such structures with titanium dioxide the strontium titanate SrTiO3 is used. In this work, a technique for producing TiO2/SrTiO3 composites formed by nanocubes of strontium titanate on the surface of filamentous TiO2, in order to improve its photocatalytic activity, is described. Nanocubic SrTiO3 was obtained from eight-way strontium hydroxide Sr(OH)2×8H2O and hydrogen titanate H2Ti3O7 during a two-stage hydrothermal reaction. A technique for forming a TiO2/SrTiO3 composite layer on a titanium foil substrate for studies of photocatalytic properties by gas chromatography is described. The results of a study of the morphology of TiO2/SrTiO3 nanostructures by scanning electron microscopy and the phase composition of samples by X-ray diffraction analysis depending on the synthesis temperature and post-treatment temperature are presented. The results of measuring the optical band gap of the TiO2/SrTiO3 composite obtained by diffuse reflection spectroscopy are given. Based on the values of the component yields, the results of a study of the catalytic activity of samples in the carbon dioxide CO2 reduction reaction are described. The results have shown that the total yield of reaction products increased by three times using the TiO2/SrTiO3 composite compared to commercial TiO2 P25.

Key words: titanium dioxide TiO2, strontium titanate SrTiO3, carbon dioxide CO2, hydrothermal synthesis, nanoscale filaments, catalytic activity
Published in: ELECTRONICS MATERIALS
Bibliography link: Kruzhalina M. D., Tarasov A. M., Dronova D. A., Volkova L. S., Tregubov A. V., Zhurina E. S., Shabaeva E. N., Dubkov S. V., Gromov D. G. Hydrothermal synthesis of TiO2/SrTiO3 composite nanostructures for photocatalysis application. Izv. vuzov. Elektronika = Proc. Univ. Electronics. 2025;30(3):274–286. (In Russ.). https://doi.org/10.24151/1561-5405-2025-30-3-274-286.
Financial source: the work has been supported by the Russian Science Foundation (project no. 22-19-00654).

Margarita D. Kruzhalina
National Research University of Electronic Technology (Russia, 124498, Moscow, Zelenograd, Shokin sq., 1)

Andrey M. Tarasov
National Research University of Electronic Technology (Russia, 124498, Moscow, Zelenograd, Shokin sq., 1)

Daria A. Dronova
National Research University of Electronic Technology (Russia, 124498, Moscow, Zelenograd, Shokin sq., 1)

Lidiya S. Volkova
Institute of Nanotechnology of Microelectronics of the Russian Academy of Sciences (Russia, 119991, Moscow, Leninsky Ave, 32А)

Alexey V. Tregubov
Ulyanovsk State University (Russia, 432017, Ulyanovsk, Leo Tolstoy st., 42)

Ekaterina S. Zhurina
Ulyanovsk State University (Russia, 432017, Ulyanovsk, Leo Tolstoy st., 42)

Elena N. Shabaeva
Ulyanovsk State University (Russia, 432017, Ulyanovsk, Leo Tolstoy st., 42)

Sergey V. Dubkov
National Research University of Electronic Technology (Russia, 124498, Moscow, Zelenograd, Shokin sq., 1)

Dmitry G. Gromov
National Research University of Electronic Technology (Russia, 124498, Moscow, Zelenograd, Shokin sq., 1); I. M. Sechenov First Moscow State Medical University (Russia, 119435, Moscow Bolshaya Pirogovskaya st., 2, bld. 4)

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Information about the publication

UDK: 544.526.5-44:534.422
Publication type: Scientific article
DOI: 10.24151/1561-5405-2025-30-3-274-286
RISC id: COVJMQ

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