Title :
Effects of catalytic activity of TiO/sub 2/-based specimens on their trimethylamine sensing properties
Author :
Egashira, M. ; Shimizu, Y. ; Takao, Y. ; Fukuda, K.
Author_Institution :
Dept. of Mater. Sci. & Eng., Nagasaki Univ., Japan
Abstract :
The differences in the trimethylamine (TMA) sensing properties of TiO/sub 2/ specimens loaded with noble metals were examined on the basis of their catalytic activity for TMA oxidation. It was revealed that the T/sub 80%/ of each specimen, which was defined as the temperature at which conversion of TMA to CO/sub 2/ and CO attained 80%, was closely related to the sensor temperature at the maximum sensitivity (k/sub M/). The highest value of k/sub M/ was observed for specimens with moderate catalytic activity such as TiO/sub 2/ loaded with 0.5 wt.% Ru (0.5 Ru/TiO/sub 2/) and 2.0 In/TiO/sub 2/. This behavior was anticipated to arise from the sensor configuration used in this study.<>
Keywords :
catalysis; electric sensing devices; gas sensors; indium; organic compounds; oxidation; palladium; platinum; ruthenium; semiconductor devices; titanium compounds; CO; CO/sub 2/; TiO/sub 2/:IN; TiO/sub 2/:Pd; TiO/sub 2/:Pt; TiO/sub 2/:Ru; catalytic activity; fish freshness; trimethylamine sensing; Electrical resistance measurement; Electrodes; Gas detectors; Gold; Marine animals; Monitoring; Oxidation; Temperature sensors; Thermal sensors; Titanium;
Conference_Titel :
Solid-State Sensors and Actuators, 1991. Digest of Technical Papers, TRANSDUCERS '91., 1991 International Conference on
Conference_Location :
San Francisco, CA, USA
Print_ISBN :
0-87942-585-7
DOI :
10.1109/SENSOR.1991.148980
