Materials for diagnostics of impurities of car-bon monoxide in the environment

by

 I.A. Kirovskaya, P.E. Nor

 Omsk State Technical University, RF, Omsk, Mira Av., 11

E–mail: nor@omgtu.ru

DOI: 10.33075/2220-5861-2020-2-82-86

UDC 504.064.3:628.52

Abstract:

   The article focuses on properties of a new sensitive material for sensors for diagnosing carbon monoxide in industrial emissions and in the environment. The tasks of the work were to synthesize a sensitive material – a new material for primary converters of semiconductor sensor sensors, to study  physical, chemical and adsorption properties of the resulting material, which was later used for devices for diagnosing emissions of toxic gases, namely carbon monoxide (II) in the atmospheric air. The materials for obtaining the sensor’s sensitive base were semiconductors of the cadmium sulfide and telluride compounds. The production process was carried out by isothermal diffusion. The resulting material of the CdS:CdTe, in the ratio of 23: 77 mass.% was used for further study of properties.

   The use of the obtained material for diagnosis of impurities of carbon monoxide (II) was estimated by the results of studies of the physical and chemical properties of the surface: acid-base (hydrolytic adsorption, IR spectroscopy) and adsorption. According to the research results, it was important conclusion that the search for new promising materials for primary sensor transducers can be carried out without conducting direct, labor-intensive adsorption studies, with using conclusions about the acid-base state of the surface. The resulting material, based on the studies performed, turned out to be sensitive to carbon (II) oxide and therefore it is proposed to use it as a material for an environmental sensor. The design of the sensor is proposed, the principle of operation of which is based on adsorption and desorption processes.

Keywords: sensitive material, sensor sensors, carbon monoxide, gas analyzers, automatic monitoring, adsorption.

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