期刊
SENSOR LETTERS
卷 8, 期 2, 页码 238-242出版社
AMER SCIENTIFIC PUBLISHERS
DOI: 10.1166/sl.2010.1254
关键词
Formaldehyde; Pd-Doped SnO2; Nanoparticles; Gas Sensors; Gas Response
资金
- National Natural Science Foundation of China [50662006]
- Natural Science Foundation of Yunnan Province, China [2006E0013M]
The formaldehyde gas sensing characteristics of Pd-doped SnO2 nanoparticles prepared by a surfactant-assisted method were investigated in this paper. The phases of the resulting materials and the morphologies of Pd-doped SnO2 nanoparticles were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), and transmission electron micrographs (TEM). The indirect-heating sensors were fabricated using Pd-doped SnO2 nanoparticles as sensitive materials and the gas-sensing characteristics to formaldehyde gas were investigated. The results show that the sensitive material has a high gas sensitivity 80 and a quick response time 60 s to 100 ppm formaldehyde gas, making them to be promising candidates for practical detectors to formaldehyde gas. The sensitive mechanism of sensor was also analyzed and discussed.
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