CO sensing performance in micro-arc oxidized TiO2 films for air quality control

Youn Ki Jun, Hyun Su Kim, Jong Heun Lee, Seong Hyeon Hong

Research output: Contribution to journalArticle

51 Citations (Scopus)

Abstract

Porous TiO2 films were prepared by the micro-arc oxidation (MAO) of Ti plates, and their CO sensing properties at low concentrations (5-100 ppm) were investigated as an application for an air quality control sensor. The obtained rutile films exhibited the maximum CO gas response at 350 °C, which is typical for semiconductor-type gas sensors, and the Ra/Rg was ∼1.6 for 10 ppm CO (Ra: resistance in air, Rg: resistance in a sample gas). The magnitude of the gas response increased almost linearly with increasing the CO concentration from 5 to 100 ppm. The CO sensing performance of the TiO2 sensor in the presence of humidity was investigated and compared with that of a SnO2 sensor.

Original languageEnglish
Pages (from-to)69-73
Number of pages5
JournalSensors and Actuators, B: Chemical
Volume120
Issue number1
DOIs
Publication statusPublished - 2006 Dec 14

Keywords

  • Air quality control
  • CO sensor
  • Micro-arc oxidation
  • TiO

ASJC Scopus subject areas

  • Analytical Chemistry
  • Electrochemistry
  • Electrical and Electronic Engineering

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