Investigation of poly(o-anisidine)-SnO_2 nanocomposites for fabrication of low temperature operative liquefied petroleum gas sensor

摘要

Poly(o-anisidine)-tin oxide (POA-SnO_2) nanocomposites has been investigated for the fabrication of low temperature operative (100℃) liquefied petroleum gas (LPG) sensor. The POA-SnO_2 nanocomposites have been synthesized through an in situ chemical polymerization of o-anisidine in presence of SnO_2 nanoparticles. The POA-SnO_2 nanocomposite shows better LPG sensing properties than that of pure POA. The nanocomposite with 50 wt. % SnO_2 exhibits an excellent LPG sensing characteristics at the operating temperature of 100 ℃ such as higher relative gas response (~23.47% to 3.4% of LPG), extremely rapid response (~6 s), fast recovery (~33 s), good reproducibility, and remarkable selectivity. The application of POA-SnO_2 nanocomposites for fabrication of the LPG sensor was demonstrated.