Potentiometric CO₂ gas sensor based on zeolites

Titelangaben

Hagen, Gunter ; Marr, Isabella ; Moos, Ralf:
Potentiometric CO₂ gas sensor based on zeolites.
In: Sensor Letters. Bd. 9 (2011) Heft 2 . - S. 902-906.
ISSN 1546-198X
DOI: https://doi.org/10.1166/sl.2011.1640

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Abstract

Zeolites are interesting materials for gas sensing applications. Their benefiting properties range from high inner surfaces and high catalytic activities to cation-conduction. We took advantage of these properties. In a potentiometric solid-state CO2 sensor setup, the ion conductor (Nasicon) was be replaced by a sodium conductive, porous ZSM-5 zeolite thick-film as top layer in a planar setup. Since the zeolite works simultaneously as a catalytic filter, the sensor cross selectivities are highly enhanced.