Sensors based on nanostructured semiconducting metal oxides for the detection of toxic and explosive gases in the air

  Research aimed at the development of effective detection of hazardous airborne chemicals such as hydrogen sulfide , ammonia , carbon monoxide and nitrogen dioxide . Detectors include semiconductor gas sensors and channels preconcentration of target gases porous sorbents. Were adjusted composition of gas sensors sensitive materials and materials preconcentrator for detecting CO, NO₂, H₂S, NH₃ at the MPC. Most of the work included the preparation of nanocrystalline oxide doped with antimony , which was introduced in sensitive materials in order to reduce the resistance of the sensor at the operating temperature of the target gas in the atmosphere and in the air.

  Investigations of the composition, structure , and electrical properties of sensory parameters doped sensitive materials. The effect of antimony on the detection limit , the dependence of the sensor signal from the temperature and concentration of the target gas , the effect of humidity on the properties of doped materials. Sensory parameters are measured for each of the target gas concentration in the range 0.5-10 on the MAC level of the working area .


KEYWORDS

Semiconductor gas sensors , metal oxides , predkontsentrirovanie , toxic gases , nanocrystals , the sol- gel method .