Analytical chemistry council

METHODS AND OBJECTS OF CHEMICAL ANALYSIS

(Metody i Ob''ekty Himicheskogo Analiza)

An international journal devoted to all aspects of Analytical chemistry

ISSN 2413-6166 (Online), ISSN 1991-0290 (Print)

Kiev University
 

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Semiconductor Sensor with Loaded SnO2 Nanoparticles for Early Warning of Indoor Fires

Nelly P. Maksymovych*, Ludmila P. Oleksenko, Georgiy V. Fedorenko, Ganna O. Arinarkhova

* Corresponding authors

Taras Shevchenko National University of Kyiv, 64/13 Volodymyrska str., Kyiv, 01601, Ukraine;
*e-mail: n.maximovich@gmail.com

Methods Objects Chem. Anal., 2019, 14(1), p. 37-42

https://doi.org/10.17721/moca.2019.37-42

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Abstract

Nanosized tin dioxide material with an average particle size of 10-11 nm was prepared by a sol-gel method. The material has been tested as a gas sensitive layer of a semiconductor sensor. Platinum was introduced into the gas sensitive layer to increase the sensor response to hydrogen. It was shown that the Pt-containing sensor has high sensitivity to hydrogen: its electrical resistance changes in 9.2 times in the presence of 22 ppm H2 in air. It was demonstrated that the sensor applicable to a wide range of H2 measurements in air (3-935 ppm) and has a fast dynamic response. The sensor demonstrates rather good reproducibility of its signal to H2 and withstands hydrogen overload (935 ppm) without a loss of its sensitivity to H2 microconcentration (22 ppm). The results are prospective for applying the sensor in the detectors for early warning of indoor fires.

Keywords: adsorption-semiconductor sensor, nanosized SnO2, hydrogen, fair-presage gases

Article language: Ukr


Publisher:Taras Shevchenko National University, Kiev Ukraine

(Analytical chemistry department at Taras Shevchenko National University, 64 Vladimirskaya STR., Kiev, 01601 UKRAINE)
analysis@univ.kiev.ua, www.achem.univ.kiev.ua, +380-44-2393345

Papers published in Methods and Objects of Chemical Analysis are considered as publications suitable for PhD thesis

The journal website: www.moca.net.ua