Sensors (Jul 2010)

Effects of High-Humidity Aging on Platinum, Palladium, and Gold Loaded Tin Oxide—Volatile Organic Compound Sensors

  • Maiko Nishibori,
  • Noriya Izu,
  • Woosuck Shin,
  • Yuichi Sakai,
  • Masahiro Kadosaki,
  • Ichiro Matsubara,
  • Toshio Itoh

DOI
https://doi.org/10.3390/s100706513
Journal volume & issue
Vol. 10, no. 7
pp. 6513 – 6521

Abstract

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This study is an investigation of high-humidity aging effects on the total volatile organic compound (T–VOC) gas-sensing properties of platinum, palladium, and gold-loaded tin oxide (Pt,Pd,Au/SnO2) thick films. The sensor responses of the high-humidity aged Pt,Pd,Au/SnO2, a non-aged Pt,Pd,Au/SnO2, and a high-humidity aged Pt/SnO2 to T–VOC test gas have been measured. The high-humidity aging is an effective treatment for resistance to humidity change for the Pt,Pd,Au/SnO2 but not effective for the Pt/SnO2. The mechanism of the high-humidity aging effects is discussed based on the change of surface state of the SnO2 particles.

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