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Influence of Humidity and Different Gases on a Resistive Room Temperature NO₂ Gas Dosimeter Based on Al-Doped ZnO for ppb-Concentration Detection

Titelangaben

Wagner, Ricarda ; Schönauer-Kamin, Daniela ; Moos, Ralf:
Influence of Humidity and Different Gases on a Resistive Room Temperature NO₂ Gas Dosimeter Based on Al-Doped ZnO for ppb-Concentration Detection.
In: Journal of the Electrochemical Society. Bd. 167 (2020) Heft 16 . - 167516.
ISSN 1945-7111
DOI: https://doi.org/10.1149/1945-7111/abcb65

Volltext

Link zum Volltext (externe URL): Volltext

Abstract

NO2 in the ppb-range can be detected at room temperature by aluminum-doped zinc oxide, whereby the sensor devices are operated as resistive gas dosimeters. In this operation mode, the dose of an analyte is measured directly and the actual analyte concentration can be determined by mathematical differentiation. It is crucial that already adsorbed analyte species do not desorb from the sensitive material and therefore their recovery time is infinite. As classically operated metal oxide sensors are known for their low selectivity, the selectivity of the sensor is investigated. The here-presented results show that the sensor can detect NO2 very selectively even at low concentrations in the low ppb range. Since it has already been reported that humidity can accelerate the desorption of gas molecules from metal oxides, furthermore, the influence of humidity on the dosimeter behavior is investigated. It is shown that the holding capability is negatively affected and the analyte desorbs faster in humid atmosphere.

Weitere Angaben

Publikationsform: Artikel in einer Zeitschrift
Begutachteter Beitrag: Ja
Institutionen der Universität: Fakultäten > Fakultät für Ingenieurwissenschaften
Fakultäten > Fakultät für Ingenieurwissenschaften > Lehrstuhl Funktionsmaterialien > Lehrstuhl Funktionsmaterialien - Univ.-Prof. Dr.-Ing. Ralf Moos
Profilfelder > Advanced Fields > Neue Materialien
Forschungseinrichtungen > Zentrale wissenschaftliche Einrichtungen > Bayreuther Materialzentrum - BayMAT
Fakultäten
Fakultäten > Fakultät für Ingenieurwissenschaften > Lehrstuhl Funktionsmaterialien
Profilfelder
Profilfelder > Advanced Fields
Forschungseinrichtungen
Forschungseinrichtungen > Zentrale wissenschaftliche Einrichtungen
Titel an der UBT entstanden: Ja
Themengebiete aus DDC: 600 Technik, Medizin, angewandte Wissenschaften > 620 Ingenieurwissenschaften
Eingestellt am: 14 Dec 2020 11:58
Letzte Änderung: 16 Mai 2024 10:29
URI: https://eref.uni-bayreuth.de/id/eprint/61028