Potentiometric sensor based on NASICON and In2O3 for detection of CO2 at room temperature - Modification with foreign substances

Kenji Obata, Shizuko Kumazawa, Kengo Shimanoe, Norio Miura, Noboru Yamazoe

研究成果: Contribution to journalConference article査読

31 被引用数 (Scopus)


In an attempt to improve the CO2 sensing properties of NASICON (Na+ conductor)-based potentiometric device attached with In2O3 at room temperature, Na3PO4, NaHCO3 and Na2CO3 were introduced as single-components or combinations in the CO2 sensing layer of the device. Although, the original device suffered disturbance by humidity seriously, the disturbance could be reduced effectively, in some case almost completely, in the resulting modified devices, while the sensitivity to CO2 could be even promoted. The best device obtained, for which both of Na3PO4 and NaHCO3 were introduced, showed fairly excellent sensing characteristics, i.e. high sensitivity to CO2 and high resistance to disturbance by humidity at 30°C. The emf of the device was linear to the logarithm of CO2 concentration in the range 300-3000 ppm following well the Nernst equation for a 1.2 electron-reduction of CO2.

ジャーナルSensors and Actuators, B: Chemical
出版ステータス出版済み - 6 1 2001
イベントProceeding of the 8th International Meeting on Chemical Sensors - Basel, スイス
継続期間: 7 2 20007 5 2000

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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