High Performance Mixed Potential Type NO(2) Gas Sensor Based on Porous YSZ Layer Formed with Graphite Doping

High performance mixed potential type NO(2) sensors using porous yttria-stabilized zirconia (YSZ) layers doped with different concentration graphite as solid electrolyte and LaFeO(3) as sensing electrode were fabricated and characterized. LaFeO(3) was prepared by a typical citrate sol–gel method and...

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Detalles Bibliográficos
Autores principales: Hong, Hao, Sun, Jianwen, Wu, Cinan, Liu, Zewen
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2019
Materias:
Article
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6696306/
https://www.ncbi.nlm.nih.gov/pubmed/31366065
http://dx.doi.org/10.3390/s19153337
Descripción
Sumario:High performance mixed potential type NO(2) sensors using porous yttria-stabilized zirconia (YSZ) layers doped with different concentration graphite as solid electrolyte and LaFeO(3) as sensing electrode were fabricated and characterized. LaFeO(3) 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 NO(2)) and the response is linearly dependent on the logarithm of NO(2) concentration in the range of 10–200 ppm. The sensor measurement results also present good repeatability and cross-sensitivity.

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