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

Hao Hong; Jianwen Sun; Cinan Wu; Zewen Liu

doi:10.3390/s19153337

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

Hao Hong, Jianwen Sun, Cinan Wu, Zewen Liu^*

^*Corresponding author for this work

Electronic Components, Technology and Materials

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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.

Original language	English
Article number	3337
Pages (from-to)	1-11
Number of pages	11
Journal	Sensors (Switzerland)
Volume	19
Issue number	15
DOIs	https://doi.org/10.3390/s19153337
Publication status	Published - 2019

Keywords

Graphite
Mixed potential
NO
Porous YSZ layers

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10.3390/s19153337

sensors-19-03337-v2Final published version, 2.33 MBLicence: CC BY

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

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.",

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AU - Hong, Hao

AU - Sun, Jianwen

AU - Wu, Cinan

AU - Liu, Zewen

PY - 2019

Y1 - 2019

N2 - 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.

AB - 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.

KW - Graphite

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KW - Porous YSZ layers

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

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