Enhance the Sensitivity of Polyaniline Doped with Strontium Oxide Nanocomposites by H2S GAS

The conducting Polyaniline-Strontium Oxide (PANI/SrO) nanocomposites were synthesized in the laboratory by chemical oxidation in-situ polymerization technique with variable weight percentages of 10, 20, 30, 40 and 50 of pure Strontium oxide in Polyaniline, The size of nanocomposites were characterized by X-ray diffraction (XRD) and it is found to be 25nm. The surface morphology of the nanocomposites was studied by scanning Electron Microscope (SEM) and it is found to be porous and sponge like nanomaterials. The porous nanomaterials is very useful for gas sensor applications. The sensitivity of various wt. % of PANI-SrO nanocomposites as a function of time at room temperature. Among all the samples 50wt. % of PANI-SrO nanocomposites shows highest sensitivity for 100ppm of H2S gas injected into the gas chamber. For pure polyanline and 10wt% of PANI/SrO nanocomposites shows low sensitivity.