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

55 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

Access to Document

10.1016/j.snb.2006.01.045

Cite this

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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 - CO sensor

KW - Micro-arc oxidation

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