Cross-sensitivity and stability of NO{sub 2} sensor from WO{sub 3} thin film

Conference · Tue Dec 31 04:00:00 EST 1996

OSTI ID:441267

Cantalini, C; Sun, H T; Pelino, M ^[1]

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1. Univ. of L`Aquila (Italy); and others

Nitrogen oxides (NO and NO{sub 2}) significantly contribute to acid rain and photo-chemical smog. NO itself is not an irritant, but can react with haemoglobin to form methaemoglobin. On the contrary, NO{sub 2} is an irritant gas and causes pulmonary edema and exudative inflammation. The threshold limit values are 25 ppm for NO and 3 ppm for NO{sub 2}. Since NO emitted from combustion systems readily transforms to NO{sub 2}, detection and control of NO{sub 2} are also receiving major attention. WO{sub 3} material is considered as one of the best candidates for this purpose. Previous experiments highlight that the thermally evaporated thin film exhibits a high sensitivity to low concentration NO{sub 2} in the 0.2-5.0 ppm range. This work is aimed at an further investigation of cross-sensitivity and stability of the sensor under an operation condition.

• OSTI ID: 441267
• Report Number(s): CONF-960782--
• Country of Publication: United States
• Language: English

Related Subjects

20 FOSSIL-FUELED POWER PLANTS
33 ADVANCED PROPULSION SYSTEMS
44 INSTRUMENTATION
INCLUDING NUCLEAR AND PARTICLE DETECTORS
54 ENVIRONMENTAL SCIENCES
DESIGN
MEASURING INSTRUMENTS
MONITORING
NITROGEN DIOXIDE
PERFORMANCE
THIN FILMS
TUNGSTEN OXIDES