Determination of Nitrogen Dioxide by Thin-Film Chemical Sensors Based on CdxPb1 –xS
- Authors: Bezdetnova A.E.1, Markov V.F.1,2, Maskaeva L.N.1,2, Shashmurin Y.G.1, Frants A.S.1, Vinogradova T.V.1
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Affiliations:
- Institute of Chemical Technology, Ural Federal University Named after the First President of Russia B.N. El’tsin
- Ural Institute of State Fire Service, Ministry of Emergencies of Russia
- Issue: Vol 74, No 12 (2019)
- Pages: 1256-1262
- Section: Articles
- URL: https://journals.rcsi.science/1061-9348/article/view/183358
- DOI: https://doi.org/10.1134/S1061934819120025
- ID: 183358
Cite item
Abstract
The results of a study of sensors based on thin semiconductor films of CdxPb1 – xS solid solutions intended for the determination of nitrogen dioxide in air are described. For a comparative assessment of the composition, morphology, and functional properties of the films, they were synthesized from reaction mixtures containing various cadmium salts. It was found that the maximum response is provided by layers obtained using cadmium acetate, in which the composition of the solid solution differs in the maximum supersaturation level in CdS. The films were formed of crystallites with average sizes of ~200 nm. When the concentration of nitrogen dioxide in air was 0.05‒200 mg/m3, the relative change in the ohmic resistance of sensors ranged from 8 to 80%. It was shown that the threshold concentration of NO2 in air was about 0.02 mg/m3. The reversible nature of the gas adsorption process opens a possibility for the creation of reusable chemical sensors based on CdxPb1 – xS films, differing in a relatively low threshold concentration of NO2 detection and selective response in the presence of significantly higher concentrations of O2, CO2, and H2.
About the authors
A. E. Bezdetnova
Institute of Chemical Technology, Ural Federal University Named after the First President of Russia B.N. El’tsin
Author for correspondence.
Email: bezdetnova_alena@mail.ru
Russian Federation, Yekaterinburg, 620002
V. F. Markov
Institute of Chemical Technology, Ural Federal University Named after the First President of Russia B.N. El’tsin; Ural Institute of State Fire Service, Ministry of Emergencies of Russia
Email: bezdetnova_alena@mail.ru
Russian Federation, Yekaterinburg, 620002; Yekaterinburg, 620002
L. N. Maskaeva
Institute of Chemical Technology, Ural Federal University Named after the First President of Russia B.N. El’tsin; Ural Institute of State Fire Service, Ministry of Emergencies of Russia
Email: bezdetnova_alena@mail.ru
Russian Federation, Yekaterinburg, 620002; Yekaterinburg, 620002
Yu. G. Shashmurin
Institute of Chemical Technology, Ural Federal University Named after the First President of Russia B.N. El’tsin
Email: bezdetnova_alena@mail.ru
Russian Federation, Yekaterinburg, 620002
A. S. Frants
Institute of Chemical Technology, Ural Federal University Named after the First President of Russia B.N. El’tsin
Email: bezdetnova_alena@mail.ru
Russian Federation, Yekaterinburg, 620002
T. V. Vinogradova
Institute of Chemical Technology, Ural Federal University Named after the First President of Russia B.N. El’tsin
Email: bezdetnova_alena@mail.ru
Russian Federation, Yekaterinburg, 620002