Physics of the Solid State
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- 2022
Influence of the structure and chemical composition of tin oxide on the gas sensing properties of composite nanofibers based on multiwalled carbon nanotube
Sokolov D.V.
1, Nesov S. N.
1, Bolotov V. V.
1
1Omsk Scientific Center, Siberian Branch, Russian Academy of Sciences, Omsk, Russia
Email: classicsub-zero@mail.ru
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 Sn2+ to Sn4+. Keywords: individual nanofibers, carbon nanotube, tin oxide, gas sensitivity, chemical state.
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