期刊
SENSORS
卷 14, 期 4, 页码 6806-6818出版社
MDPI
DOI: 10.3390/s140406806
关键词
gas sensor; ozone; multiwall carbon nanotubes; Pd nanoparticles
资金
- Direccion de Investigacion y Posgrado del Instituto Mexicano del Petroleo
- CONACyT
- Physicis and Mathematics Department
- Direction of Research at Universidad Iberoamericana
Multiwall carbon nanotubes (MWCNTs) were easily and efficiently decorated with Pd nanoparticles through a vapor-phase impregnation-decomposition method starting from palladium acetylacetonates. The sensor device consisted on a film of sensitive material (MWCNTs-Pd) deposited by drop coating on platinum interdigitated electrodes on a SiO2 substrate. The sensor exhibited a resistance change to ozone (O-3) with a response time of 60 s at different temperatures and the capability of detecting concentrations up to 20 ppb. The sensor shows the best response when exposed to O-3 at 120 degrees C. The device shows a very reproducible sensor performance, with high repeatability, full recovery and efficient response.
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