摘要
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 ℃ among the four operating temperatures (room temperature, 30, 60 and 90 ℃), 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.
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 ℃ among the four operating temperatures (room temperature, 30, 60 and 90 ℃), 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.
出处
《中国有色金属学会会刊：英文版》
CSCD
2009年第S3期678-683,共6页
Transactions of Nonferrous Metals Society of China
基金
Project (20070410866) supported by Postdoctoral Science Foundation of China
Project(L2006B18) supported by Doctoral Foundation of Hebei Normal University
