Abstract
Nb2O5–TiO2 nanomaterials containing 0.5 and 10 mol % TiO2 have been synthesized by the programmed deposition method. The products have been characterized by modern physicochemical methods The Nb2O5–TiO2 nanomaterials have a crystal structure of orthorhombic Nb2O5 (T-phase). Individual niobium oxide is composed of nanoparticles with an average size of 15 ± 3 nm; increasing the TiO2 content entails microstructural changes. For the Nb2O5–TiO2 coatings, a set of chemoresistive gas-sensing properties has been studied. Of all the analyzed gases, the highest sensitivity was recorded for oxygen and hydrogen sulfide. It has been shown that the sample with 5% TiO2 is most sensitive to О2 and H2S, which is explained by the formation of additional oxygen vacancies.
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ACKNOWLEDGMENTS
The SEM and XRD measurements were carried out using the equipment of the Shared Facility Center for Physical Methods of Investigation at the IGIC RAS, supported by the state assignment of the IGIC RAS in the field of basic research.
Funding
The study was supported through a grant from the President of the Russian Federation (MK-1023.2020.3, study of the chemoresistive properties of nanocrystalline composites based on Nb2O5) and within the framework of the state assignment of the Institute of General and Inorganic Chemistry, RAS, in the field of basic research (development of methods for the synthesis of semiconductor receptor oxide nanomaterials).
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Translated by G. Kirakosyan
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Mokrushin, A.S., Simonenko, N.P., Simonenko, T.L. et al. Synthesis and Chemoresistive Gas-Sensing Properties of Highly Dispersed Titanium-Doped Nb2O5. Russ. J. Inorg. Chem. 66, 1425–1433 (2021). https://doi.org/10.1134/S0036023621090060
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DOI: https://doi.org/10.1134/S0036023621090060