Abstract
Double-layer structures based on gas-sensitive semiconducting metal oxides and silicalite-1 were tested in detection of carbon monoxide in humid air. Pure tin dioxide and that modified with antimony and palladium served as materials of the sensitive layer. Upon deposition of a silicalite-1 layer on SnO2 and SnO2/PdOx, the signal for CO in dry air at room measurement temperature (T = 25°C) grows, but an increase in the air humidity results in that the sensor sensitivity fully disappears. Raising the measurement temperature to 100°C makes weaker the adverse effect of the humidity. The double-layer structure containing the SnO2(Sb)/PdOx nanocomposite is characterized by the most stable sensor signal that is independent of the air humidity within the range RH = 4‒65%.
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Original Russian Text © D.G. Gulevich, A.V. Marikutsa, M.N. Rumyantseva, P.B. Fabrichnyi, T.B. Shatalova, A.M. Gas’kov, 2018, published in Zhurnal Prikladnoi Khimii, 2018, Vol. 91, No. 10, pp. 1480−1490.
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Gulevich, D.G., Marikutsa, A.V., Rumyantseva, M.N. et al. Detection of Carbon Monoxide in Humid Air with Double-Layer Structures Based on Semiconducting Metal Oxides and Silicalite. Russ J Appl Chem 91, 1671–1679 (2018). https://doi.org/10.1134/S1070427218100154
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DOI: https://doi.org/10.1134/S1070427218100154