Abstract
Poyaniline/In2O3 were synthesized by using the in situ polymerization method for different concentrations of nano In2O3 powder. The formation of nanocomposites and changes in the structural and micro structural properties of the materials were investigated by X-ray diffractometry (XRD). The surface morphology of PANI–In2O3 nanocomposite was elucidated using Scanning Electron Microscopy. DC conductivity studies of PANI-In2O3 composites for different wt% show thermally activated behavior. The conductivity was found to increase with the increase in temperature indicating the semiconducting behavior of all the compositions. On exposure of the composites to LPG, increase in resistance was observed with the increase in gas concentration. Maximum sensitivity for gas sensing was observed in the composite of 50 wt% In2O3 in polyaniline.
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