Gas sensor using noble metal-loaded TiO2 nanotubes for detection of large-sized volatile organic compounds

Min Hyun Seo, Masayoshi Yuasa, Tetsuya Kida, Yuich Kanmura, Jeung Soo Huh, Noboru Yamazoe, Kengo Shimanoe

研究成果: ジャーナルへの寄稿学術誌査読

17 被引用数 (Scopus)

抄録

Detection of volatile organic compounds (VOCs) has attracted considerable attention for indoor air quality and human breath analysis. Here, resistive-type gas sensors with porous films made of Au-loaded TiO2 nanotubes were developed for the detection of large-sized VOCs. Well-dispersed Au nanoparticles (10 to 20 nm) were photo-chemically deposited on TiO2 nanotubes (80nm in diameter, 700nm in length) prepared by a hydrothermal method. The device using the Au-loaded TiO2 nanotubes showed improved sensor responses to ethanol and toluene (50 ppm) in air at 500°C. This suggested that Au nanoparticles deposited on the surface of TiO2 nanotubules without aggregation. We also demonstrated that the device could be used for the detection of largesized VOC molecule, i.e., 2,6-diisopropylphenol (propofol), an intravenously administered hypnotic drug for induction and maintenance of anesthesia. The Au-loaded TiO2 nanotubes would offer a way to continuously monitor a change in the concentration of VOCs in exhaled air for medical diagnostics.

本文言語英語
ページ(範囲)884-889
ページ数6
ジャーナルJournal of the Ceramic Society of Japan
119
1395
DOI
出版ステータス出版済み - 11月 2011
外部発表はい

!!!All Science Journal Classification (ASJC) codes

  • セラミックおよび複合材料
  • 化学 (全般)
  • 凝縮系物理学
  • 材料化学

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