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

doi:10.1016/j.snb.2006.01.045

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 journal › Article › peer-review

53 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 R_a/R_g was ∼1.6 for 10 ppm CO (R_a: resistance in air, R_g: 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 language	English
Pages (from-to)	69-73
Number of pages	5
Journal	Sensors and Actuators, B: Chemical
Volume	120
Issue number	1
DOIs	https://doi.org/10.1016/j.snb.2006.01.045
Publication status	Published - 2006 Dec 14

Keywords

Air quality control
CO sensor
Micro-arc oxidation
TiO

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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title = "CO sensing performance in micro-arc oxidized TiO2 films for air quality control",

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.",

keywords = "Air quality control, CO sensor, Micro-arc oxidation, TiO",

author = "Jun, {Youn Ki} and Kim, {Hyun Su} and Lee, {Jong Heun} and Hong, {Seong Hyeon}",

note = "Funding Information: This work was supported by the NANO Systems Institute-National Core Research Center (NSI-NCRC) program of Korea Science and Engineering Foundation (KOSEF), Korea. Copyright: Copyright 2008 Elsevier B.V., All rights reserved.",

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AU - Jun, Youn Ki

AU - Kim, Hyun Su

AU - Lee, Jong Heun

AU - Hong, Seong Hyeon

N1 - Funding Information: This work was supported by the NANO Systems Institute-National Core Research Center (NSI-NCRC) program of Korea Science and Engineering Foundation (KOSEF), Korea. Copyright: Copyright 2008 Elsevier B.V., All rights reserved.

PY - 2006/12/14

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N2 - 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.

AB - 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.

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KW - Micro-arc oxidation

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