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High performance mixed potential type No2 gas sensor based on porous YSZ layer formed with graphite doping

Journal Article (2019)
Author(s)

Hao Hong (Guizhou University)

Jianwen Sun (China Research Institute, TU Delft - Electrical Engineering, Mathematics and Computer Science)

Cinan Wu (Guizhou University)

Zewen Liu (Tsinghua University)

Research Group
Electronic Components, Technology and Materials
DOI related publication
https://doi.org/10.3390/s19153337 Final published version
More Info
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Publication Year
2019
Language
English
Research Group
Electronic Components, Technology and Materials
Journal title
Sensors (Switzerland)
Issue number
15
Volume number
19
Article number
3337
Pages (from-to)
1-11
Downloads counter
299
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Institutional Repository
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Abstract

High performance mixed potential type NO2 sensors using porous yttria-stabilized zirconia (YSZ) layers doped with different concentration graphite as solid electrolyte and LaFeO3 as sensing electrode were fabricated and characterized. LaFeO3 was prepared by a typical citrate sol–gel method and characterized using XRD. The surface morphology and porosity of porous YSZ layers were characterized by field emission scanning electron microscope (FESEM). The sensor doped with 3 wt% graphite shows the highest response (−76.4 mV to 80 ppm NO2) and the response is linearly dependent on the logarithm of NO2 concentration in the range of 10–200 ppm. The sensor measurement results also present good repeatability and cross-sensitivity.