Ultraselective and ultrasensitive detection of trimethylamine using MoO3 nanoplates prepared by ultrasonic spray pyrolysis

Yoon Ho Cho, You Na Ko, Yun Chan Kang, Il Doo Kim, Jong Heun Lee

Research output: Contribution to journalArticle

66 Citations (Scopus)

Abstract

An ultraselective and ultrasensitive trimethylamine (TMA) sensor was achieved using MoO3 nanoplates-prepared by ultrasonic spray pyrolysis followed by a heat treatment at 450 C. The small and thin MoO3 nanoplates with gas-accessible structures showed an unusually high response to 5 ppm TMA (ratio of resistance to air and gas = 373.74) at 300 C with detection limit as low as 45 ppb. Moreover, the ratios of the cross-responses to interfering gases (i.e., 5 ppm C2H5OH, CO, CH4, C3H8, H2, and NO2) to the response to 5 ppm TMA were extremely low (0.008-0.016). The source of the ultraselective and highly sensitive detection of TMA with negligible interference from other gases is discussed with respect to the acid/base properties, size, and morphology of the MoO3 sensing materials.

Original languageEnglish
Pages (from-to)189-196
Number of pages8
JournalSensors and Actuators, B: Chemical
Volume195
DOIs
Publication statusPublished - 2014 May

Keywords

  • Gas sensors
  • MoO nanoplates
  • Selective detection
  • Trimethylamine
  • Ultrasonic spray pyrolysis

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Instrumentation
  • Condensed Matter Physics
  • Surfaces, Coatings and Films
  • Metals and Alloys
  • Electrical and Electronic Engineering
  • Materials Chemistry

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