International Conference PhysicA.SPb/2023

Influence of the structure and chemical composition of tin oxide on the gas sensing properties of composite nanofibers based on multiwalled carbon nanotube

D. V. Sokolov, S. N. Nesov, V. V. Bolotov

Omsk Scientific Center, Siberian Branch of the Russian Academy of Sciences, Omsk, Russia

Abstract: Individual nanofibers and thier nanobundles from multi-walled carbon nanotubes coated tin oxide were formed for two oxide compositions – amorphous and polycrystalline. Nanofibers with polycrystalline tin oxide had an increased gas response to ammonia and nitrogen dioxide by 1.4–2.8 and 2.7–3.8 times, respectively, compared to nanofibers coated amorphous nonstoichiometric oxide. The sensitivity enhance to nitrogen dioxide is explained by the additional oxidation of tin as Sn$^{2+}$ to Sn$^{4+}$.

Keywords: individual nanofibers, carbon nanotube, tin oxide, gas sensitivity, chemical state.

Received: 11.05.2023
Revised: 18.07.2023
Accepted: 30.10.2023

DOI: 10.61011/FTT.2023.12.56726.5028k

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