Open Access

Sensor Functionality of In Situ Synthesised Polyaniline - SnO 2 Hybrids towards Toluene Vapour

C. Murugan, Department of Chemistry, Manonmaniam Sundaranar University, Tirunelveli, TN, India. E. Subramanian, esubram@yahoo.com
Department of Chemistry, Manonmaniam Sundaranar University, Tirunelveli, TN, India. D. PathinettamPandiyan Department of Physics ,Manonmaniam Sundaranar University, Tirunelveli, TN, India

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Abstract

Polyaniline-SnO₂ (PANI-SnO₂ ) hybrid materials with varied SnO₂ content were prepared by in situ chemical oxidative polymerization method. The prepared materials were characterized by FT-IR, XRD and SEM analyses. Sensitivity of the materials towards toluene was measured at room temperature from their conductivity change. The PANI-SnO₂  composite with 40 wt.% SnO₂ exhibited highest sensitivity. In situ synthesis enhanced the sensitivity of the materials over their physical mixture. This might be due to the formation of higher number of p-n heterojunctions during in situ synthesis.

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Reference

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