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

Research output: Contribution to journalArticleScientificpeer-review

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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 languageEnglish
Article number3337
Pages (from-to)1-11
Number of pages11
JournalSensors (Switzerland)
Issue number15
Publication statusPublished - 2019


  • Graphite
  • Mixed potential
  • NO
  • Porous YSZ layers

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