Enhanced H2S sensing characteristics of Pt doped SnO2 nanofibers sensors with micro heater

Ki Young Dong, Joong Ki Choi, In Sung Hwang, Jin Woo Lee, Byung Hyun Kang, Dae Jin Ham, Jong Heun Lee, Byeong Kwon Ju

Research output: Contribution to journalArticle

76 Citations (Scopus)

Abstract

Gas sensors were designed and fabricated using oxide nanofibers as the sensing materials on micro platforms using micromachining technology. Pure and Pt doped SnO2 nanofibers were prepared by electrospinning and their H2S gas sensing characteristics were subsequently investigated. The sensing temperatures of 300 and 500 °C could be attained at the heater powers of 36 and 94 mW, respectively, and the sensors showed high and fast responses to H2S. The responses of 0.08 wt% Pt doped SnO2 nanofibers to 4-20 ppm H2S, were 25.9-40.6 times higher than those of pure SnO2 nanofibers. The gas sensing characteristics were discussed in relation to the catalytic promotion effect of Pt, nano-scale morphology of electrospun nanofibers, and sensor platform using micro heater.

Original languageEnglish
Pages (from-to)154-161
Number of pages8
JournalSensors and Actuators, B: Chemical
Volume157
Issue number1
DOIs
Publication statusPublished - 2011 Sep 20

Keywords

  • Gas sensors
  • HS sensors
  • Micro heater
  • Pt-SnO
  • SnO nanofibers

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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