Synthesis of monodispersed SnO2 nanocrystals and their remarkably high sensitivity to volatile organic compounds

Tetsuya Kida, Takayuki Doi, Kengo Shimanoe

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Abstract

In situ detection of volatile organic compounds (VOCs) in the atmosphere has become particularly important because of their detrimental effects on human health and the environment. To develop high-performance gas sensors capable of detecting VOCs in ppb concentrations, we prepared SnO2 nanocrystals by a liquid-phase synthesis method. Nearly monodispersed SnO2 nanocrystals (ca. 3.5 nm) were prepared by heating tin(IV) acetylacetonate in dibenzyl ether in the presence of oleic acid and oleylamine at 280 °C. The prepared nanocrystals exhibited high thermal stability against crystal growth, even at 600 °C, allowing for the fabrication of nanoparticulate gas-sensing films. The sensor device using the nanocrystals calcined at 600 °C exhibited significantly high sensor responses to VOCs such as ethanol, formaldehyde, and toluene at low ppm concentrations.

Original languageEnglish
Pages (from-to)2662-2667
Number of pages6
JournalChemistry of Materials
Volume22
Issue number8
DOIs
Publication statusPublished - Apr 27 2010

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All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Chemical Engineering(all)
  • Materials Chemistry

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