Abstract
AbstractPolyaniline (PANI) and a polyaniline derivative (poly (2,5‐dimethyl aniline)) are evaluated for their sensitivity towards formaldehyde. Among the two polymer backbones evaluated, polyaniline seems more sensitive towards formaldehyde. Therefore, to further enhance sensitivity towards formaldehyde, polyaniline is doped with different weight percentages of indium oxide and further evaluated for its sensing capabilities such as sensitivity, selectivity, and stability. It is found that PANI with 1.25 wt% of In2O3 is most sensitive towards formaldehyde, while PANI with 5 wt% of In2O3 is most selective towards formaldehyde over benzene interferent. It is observed that sensitivity and selectivity trends for PANI doped with different wt% of In2O3 are reverse of each other. All sensing materials are found stable.
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