SYNTHESIS AND DIAGNOSTICS OF GAS-SENSITIVE NANOSTRUCTURES BASED ON MOLYBDENUM COMPOUNDS

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Abstract

In recent years, various transition metal dichalcogenides have been widely investigated, which are of interest for many applications, including gas sensors. In this work, some gas-sensitive nanostructures based on molybdenum disulfide and molybdenum oxide were synthesized by hydrothermal method. The surface chemical composition of the samples was studied by X-ray photoelectron spectroscopy. The gas-sensitive properties of the synthesized structures to isopropyl alcohol and acetone vapors at different working temperatures were analyzed. It was shown that as a result of heat treatment at 150°C, partial oxidation of molybdenum disulfide occured. Annealing of MoS2 samples at 400°C led to complete oxidation to MoO3 . Analysis of the gas-sensitive properties of the structures showed that molybdenum oxide has the maximum response to isopropyl alcohol and acetone vapors in the entire temperature range under study. Both molybdenum disulfide and molybdenum oxide show a better response to isopropyl alcohol vapors compared to acetone vapors.

About the authors

Svetlana S. Nalimova

Saint Petersburg Electrotechnical University «LETI»

Email: sskarpova@list.RUS
Saint Petersburg, Russia

Zamir V. Shomakhov

Kabardino-Balkarian State University named after H.M. Berbekov

Nalchik, Russia

Alexandra D. Chuprova

Saint Petersburg Electrotechnical University «LETI»

Saint Petersburg, Russia

Aslan M. Guketlov

Kabardino-Balkarian State University named after H.M. Berbekov

Nalchik, Russia

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