Solid electrolyte impedancemetric NOx sensor attached with zeolite receptor

•Impedancemetric sensor device has been designed using zeolite receptor and solid electrolyte transducer.•The resistance and capacitance responses of the sensor were opposite in sign between NO2 and NO.•The K+-doped Y-type zeolite/LATP sensor gave high NO2 sensitivity, selectivity, and tolerance to...

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Bibliographic Details
Published in:Sensors and actuators. B, Chemical Chemical, 2018-07, Vol.264, p.177-183
Main Authors: Shimizu, Youichi, Nakano, Hikaru, Takase, Satoko, Song, Jeong-Hwan
Format: Article
Language:English
Subjects:
Cation exchanging
Electrodes
Electrolytes
Impedancemetric
Nitrogen dioxide
NOx sensor
Sensors
Solid electrolytes
Solid-electrolyte
Transducers
Zeolite
Zeolites
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Summary:•Impedancemetric sensor device has been designed using zeolite receptor and solid electrolyte transducer.•The resistance and capacitance responses of the sensor were opposite in sign between NO2 and NO.•The K+-doped Y-type zeolite/LATP sensor gave high NO2 sensitivity, selectivity, and tolerance to humidity at 400 °C, 50 Hz. A new type solid-electrolyte impedancemetric sensor using a zeolite as a receptor and a Li1.5Al0.5Ti1.5(PO4)3 (LATP) disc as a transducer, respectively, was designed and its sensing properties were investigated for detection of NO and NO2 in the range of 100–500 ppm at 300–500 °C. It was revealed that the impedance responses of the sensor device attached with a zeolite receptor changed with depending on NOx concentration. Cation-exchange in zeolites gave good improvement of the sensor responses. Among the ion-exchanged zeolites, K+-doped Y-type zeolite-based sensor showed the highest sensitivity and selectivity to NO2.
ISSN:0925-4005
1873-3077
DOI:10.1016/j.snb.2018.02.146