Effect of Sr2+ ions on the gas-sensitive properties of LaCrO3 and GdCrO3

Yaromir M. Nemykh; Viktor F. Kostryukov; Ivan N. Gorbunov; Elena V. Tomina

doi:10.17308/kcmf.2026.28/13591

Authors

Yaromir M. Nemykh Voronezh State University, 1, Universitetskaya pl., Voronezh 394018, Russian Federation
Viktor F. Kostryukov Voronezh State University, 1, Universitetskaya pl., Voronezh 394018, Russian Federation
Ivan N. Gorbunov Voronezh State University, 1, Universitetskaya pl., Voronezh 394018, Russian Federation
Elena V. Tomina Voronezh State University, 1, Universitetskaya pl., Voronezh 394018, Russian Federation , Voronezh State Forestry University 8, Timiryazeva st., Voronezh 394087, Russian Federation

DOI:

https://doi.org/10.17308/kcmf.2026.28/13591

Keywords:

Nanopowders, Perovskites, Gas-sensitive properties, Pechini method3, LaCrO3, GdCrO3, Sr2+ doping

Abstract

Objectives: Thin films obtained from La_1–xSr_xCrO_3–δ and Gd_1–xSr_xCrO_3–δ (x = 0.05, 0.10, and 0.15) synthesized by the modified citrate method were studied.

Experimental: An analysis of the phase composition, structure, and gas-sensitive properties of films in the presence of carbon monoxide was carried out. Doping with Sr²⁺ ions led to an increase in the defect rate of nanoparticles due to the formation of vacancies in the oxygen sublattice. This phenomenon had a positive effect on their gas-sensitive properties.

Conclusions: It was found that samples of La_0.9Sr_0.1CrO_3–δ and Gd_0.9Sr_0.1CrO_3–δ showed the highest sensory response at 180°C, 2.26 and 1.78, respectively. The results obtained confirmed the prospects of using these materials as gas sensors

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Author Biographies

Yaromir M. Nemykh, Voronezh State University, 1, Universitetskaya pl., Voronezh 394018, Russian Federation

2st year postgraduate student of the Department of Materials Science and Nanosystems Industry, Voronezh State University (Voronezh, Russian Federation)
Viktor F. Kostryukov, Voronezh State University, 1, Universitetskaya pl., Voronezh 394018, Russian Federation

Dr. Sci. (Chem.), Associate Professor at the Department of Materials Science and Industry of Nanosystems, Voronezh State University (Voronezh, Russian Federation)
Ivan N. Gorbunov, Voronezh State University, 1, Universitetskaya pl., Voronezh 394018, Russian Federation

1st year Master’s student of the Department of Materials Science and Industry of Nanosystems, Voronezh State University (Voronezh, Russian Federation)
Elena V. Tomina, Voronezh State University, 1, Universitetskaya pl., Voronezh 394018, Russian Federation, Voronezh State Forestry University 8, Timiryazeva st., Voronezh 394087, Russian Federation

Dr. Sci. (Chem.), Head of the Department of Chemistry, Voronezh State Forestry University (Voronezh, Russian Federation)

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