Title :
Enhancement of gas selectivity by additives and pattern recognition in SnO2 sensors
Author :
Cheong, Hae-Won ; Kim, Heesook Park ; Kim, Jong-Myong
Author_Institution :
Agency for Defense Dev., Taejon, South Korea
Abstract :
Using gas chromatography (GC), the effect of additives on the decomposition reactions of both reducing gases (CH3OH, C2H5OH, etc) and an oxidizing gas (CH3CN) was analyzed for the selection of proper additives. The effect of additives was further investigated in terms of the sensing characteristics. Based on these studies, two sensors, PdCl2-added SnO2 and La2O3-added SnO2, showing discriminative sensing behaviors to CH3CN were selected. By combining the signal patterns obtained from the two sensors, selectivity of the SnO2 sensors for CH3CN was highly enhanced.
Keywords :
additives; chromatography; gas sensors; lanthanum compounds; oxidation; palladium compounds; pattern recognition; reduction (chemical); tin compounds; La2O3; PdCl2; SnO2; additives; decomposition reactions; discriminative sensing behavior; gas chromatography; gas selectivity enhancement; gas sensors; oxidizing gases; pattern recognition; reducing gases; Additives; Ball milling; Gas chromatography; Gas detectors; Gases; Pattern recognition; Powders; Sensor arrays; Sensor phenomena and characterization; Tin;
Conference_Titel :
Sensors, 2004. Proceedings of IEEE
Print_ISBN :
0-7803-8692-2
DOI :
10.1109/ICSENS.2004.1426445
