Ce 2 Sn 2 O 7 /CNFs composite as a material for gas sensors and supercapacitors

Alexander I. Aparnev; Anton V. Loginov; Alexander G. Bannov; Oksana N. Novgorodtseva; Artem A. Shishin

doi:10.15826/chimtech.9052

Ce₂Sn₂O₇/CNFs composite as a material for gas sensors and supercapacitors

Alexander I. Aparnev, Anton V. Loginov, Alexander G. Bannov, Oksana N. Novgorodtseva, Artem A. Shishin

Abstract

Cerium stannate Ce₂Sn₂O₇ was obtained by the hydrothermal method from a mixture of cerium (III) nitrate and sodium stannate solutions with the addition of sodium hydroxide solution to pH 8–9. The phase composition of the hydrothermal synthesis product was studied using thermal anlysis, X-ray diffraction, scanning electron microscopy and FTIR spectroscopy. It was found that at a synthesis temperature of 180 °C, a single-phase cerium stannate with a pyrochlore structure, the particles of which have a cubic shape of 2–5 μm in size, is formed. It was shown that the response of the Ce₂Sn₂O₇/CNFs composite to NO₂ at room temperature is 41% at 10 ppm. The composite material demonstrated the possibility of its application in supercapacitors, showing a specific capacitance of 165–200 F/g at 2 mV/s. It was found that the specific capacitance of the Ce₂Sn₂O₇/CNFs composite significantly exceeds that of single-phase cerium stannate.

Keywords

cerium stannate; hydrothermal method; carbon nanofibers (CNFs); sensor; composite

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References

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DOI: https://doi.org/10.15826/chimtech.9052

Copyright (c) 2025 Alexander I. Aparnev, Anton V. Loginov, Alexander G. Bannov, Oksana N. Novgorodtseva, Artem A. Shishin