Mavani, Bhoomi HetPenlidis, Alexander2023-05-042023-05-042022-06-22https://doi.org/10.1002/mren.202200012http://hdl.handle.net/10012/19419This is the peer reviewed version of the following article: Mavani, B. H., & Penlidis, A. (2022). Indium oxide doped polyaniline for detection of formaldehyde. Macromolecular Reaction Engineering, 16(6), 2200012, which has been published in final form at https://doi.org/10.1002/mren.202200012. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Use of Self-Archived Versions.Polyaniline (PANI) and a polyaniline derivative (poly (2,5-dimethyl aniline)) were evaluated for their sensitivity towards formaldehyde. Among the two polymer backbones evaluated, polyaniline seemed more sensitive towards formaldehyde. Therefore, to further enhance sensitivity towards formaldehyde, polyaniline was doped with different weight percentages of indium oxide and further evaluated for its sensing capabilities such as sensitivity, selectivity, and stability. It was found that PANI with 1.25 wt.% of In2O3 was most sensitive towards formaldehyde, while PANI with 5 wt.% of In2O3 was most selective towards formaldehyde over benzene interferent. It was observed that sensitivity and selectivity trends for PANI doped with different wt.% of In2O3 were reverse of each other. All sensing materials were found stable.enformaldehyde sensingpolyanilinepolymeric sensing materialsmetal oxidesindium oxidesensitivityselectivitystabilitygas detectionvolatile organic compounds (VOCs)surface morphologydopantArticle