期刊
TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA
卷 19, 期 -, 页码 S678-S683出版社
ELSEVIER
DOI: 10.1016/S1003-6326(10)60131-8
关键词
gas sensitivity; polyaniline/SnO2; volatile organic compounds
资金
- Postdoctoral Science Foundation of China [20070410866]
- Doctoral Foundation of Hebei Normal University [L2006B18]
Polyaniline (PAn) was prepared by chemical oxidation polymerization and characterized by FT-IR. PAn/SnO2 materials with different mass fractions of PAn were prepared by mechanical mixing. Compared with single PAn and SnO2, the gas sensitivity of PAn/SnO2 materials to volatile organic compounds (VOCs, methanol, ethanol and acetone) was studied. The possible response mechanism of PAn/SnO2 materials to VOCs was also discussed. It is found that PAn/SnO2 materials have gas sensitivity to VOCs at 90 degrees C among the four operating temperatures (room temperature, 30, 60 and 90 degrees C), but PAn and SnO2 have no gas sensitivity at the above temperatures. The sensitivity of PAn/SnO2 materials shows linear increase with the increase of methanol concentration, but saturation with the increase of ethanol and acetone concentrations. PAn/SnO2 materials have high selectivity, fast response-recovery time and low operation temperature to VOCs, but pure PAn and SnO2 do not have.
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