NASICON-based potentiometric CO2 sensor combined with new materials operative at room temperature

Kenji Obata, Shizuko Kumazawa, Shigenori Matsushima, Kengo Shimanoe, Noboru Yamazoe

研究成果: Contribution to journalArticle査読

18 被引用数 (Scopus)


The improvement for the deterioration of CO2 sensing properties in lower humidity condition was attempted to a NASICON-based potentiometric CO2 device operative at room temperature. To optimize the sensing electrode, the device was fabricated by using ITO powders with a large specific surface area and by using a mixture of ITO and basic oxide powders. Although CO2 sensing properties of the device were markedly improved by applying the above ideas in lower humidity condition, it was confirmed that the basic EMF drifts with changing the humidity conditions. Further, to find out the appreciate reference electrode material, the thermal and chemical stabilities were examined by XRD measurement for three kinds of oxides such as Li 0.62CoO2, Na0.6CoO2 and Li 2TiO3. As the results, Na0.6CoO2 and Li2TiO3 were much stabler than Li0.62CoO 2 thermally and chemically. It was also found that Li 2TiO3 has a poor electric conductivity. Therefore, Na 0.6CoO2 is the most suitable material for the reference electrode of the NASICON-based device operative at room temperature.

ジャーナルSensors and Actuators, B: Chemical
1-2 SPEC. ISS.
出版ステータス出版済み - 7 22 2005

All Science Journal Classification (ASJC) codes

  • 電子材料、光学材料、および磁性材料
  • 器械工学
  • 凝縮系物理学
  • 表面、皮膜および薄膜
  • 金属および合金
  • 電子工学および電気工学
  • 材料化学


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