Electrical and Gas Sensing Properties of Conducting Polyaniline/SnO2 Nanocomposites

Dr. Anand Rao S. Kulkarni

Abstract: PANI/SnO2 has been synthesized and studied in terms of XRD, SEM, DC conductivity variation of temperature, AC conductivity, dielectric behavior can be studied variation of frequency at room temperature and Gas sensing properties with help of H2S gas injected at room temperature. The conducting polymer nanocomposite of PANI - SnO2 has been prepared by in situ polymerization method. The morphology of this nanocomposite has been studied by employing Scanning Electron Microscope (SEM). The Transport properties of these samples have been characterized by studying DC conductivity and AC conductivity. The AC conductivity and dielectric behavior of the nanocomposite have been investigated in the frequency range of 5Hz to 5 MHz. These nanocomposites have been found to have high dielectric constant which may be correlated with polarization. It has been also observed that both dielectric loss and dielectric constant decreases with an increase in frequency.

Keywords: PANI, Tin Oxide, XRD, SEM, Dielectric, Nanocomposites, Conducting Polymer