Preparation and Gas Sensitivity Study of Polypyrrole/Tin Oxide Hybrid Material
2005; Chinese Chemical Society; Linguagem: Inglês
ISSN
1001-4861
Autores Tópico(s)Advanced Chemical Sensor Technologies
ResumoPolypyrrole (PPy) was prepared by chemical oxidation polymerization and characterized by elemental analysis, TG-DTA and FTIR. The influence of oxidant amount on PPy gas sensitivity was discussed. PPy/SnO2 hybrid materials with different PPy content were prepared by mechanical mixing, and the sensitivities of the hybrids to toxic gases NH3, H2S, NO at low temperature were studied. The result showed that the sensitivity and stability of the hybrid materials were superior to those of PPy and SnO2 under the same conditions. At 60℃, the sensitivity of PPy/SnO2 containing 5%PPy by mass to 0.05% H2S by volume reached to 104.52, and the response-recovery time was very short. The interaction mechanism between gases and sensors was also discussed.
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