화염 분무 열분해법으로 합성된 Cr-Co3O4 나노입자 자일렌 가스센서
Xylene Sensor Using Cr-doped Co3O4 Nanoparticles Prepared by Flame Spray Pyrolysis
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초록
Xylene is a hazardous volatile organic compound that should be precisely measured to monitor indoor air quality. However, the selectiveand sensitive detection of ppm-level xylene using oxide–semiconductor gas sensors remains a challenge. In this study, pure and CrdopedCo3O4 nanoparticles (NPs) were prepared using flame spray pyrolysis, and their gas-sensing characteristics to 5-ppm xylene at250 °C were investigated. The 4 at% Cr-doped Co3O4 NPs exhibited a high gas response to 5-ppm xylene (resistance ratio to gas andair = 39.1) and negligible cross-responses to other representative and ubiquitous indoor pollutants such as ethanol, benzene, formaldehyde,carbon monoxide, and ammonia. In this paper, the enhancement of the gas response and selectivity of Co3O4 NPs to xyleneby Cr doping was discussed in relation to the catalytic promotion of the gas-sensing reaction. This sensor can be used to monitor indoorxylene.
Abstract
Xylene is a hazardous volatile organic compound that should be precisely measured to monitor indoor air quality. However, the selectiveand sensitive detection of ppm-level xylene using oxide–semiconductor gas sensors remains a challenge. In this study, pure and CrdopedCo3O4 nanoparticles (NPs) were prepared using flame spray pyrolysis, and their gas-sensing characteristics to 5-ppm xylene at250 °C were investigated. The 4 at% Cr-doped Co3O4 NPs exhibited a high gas response to 5-ppm xylene (resistance ratio to gas andair = 39.1) and negligible cross-responses to other representative and ubiquitous indoor pollutants such as ethanol, benzene, formaldehyde,carbon monoxide, and ammonia. In this paper, the enhancement of the gas response and selectivity of Co3O4 NPs to xyleneby Cr doping was discussed in relation to the catalytic promotion of the gas-sensing reaction. This sensor can be used to monitor indoorxylene.
참고문헌 (30)
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