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  • Title: Ammonia vapor sensing properties of polyaniline-titanium(IV)phosphate cation exchange nanocomposite.
    Author: Khan AA, Baig U, Khalid M.
    Journal: J Hazard Mater; 2011 Feb 28; 186(2-3):2037-42. PubMed ID: 21276658.
    Abstract:
    In this study, the electrically conducting polyaniline-titanium(IV)phosphate (PANI-TiP) cation exchange nanocomposite was synthesized by sol-gel method. The cation exchange nanocomposite based sensor for detection of ammonia vapors was developed at room temperature. It was revealed that the sensor showed good reversible response towards ammonia vapors ranging from 3 to 6%. It was found that the sensor with p-toluene sulphonic acid (p-TSA) doped exhibited higher sensing response than hydrochloric acid doped. This sensor has detection limit ≤1% ammonia. The response of resistivity changes of the cation exchange nanocomposite on exposure to different concentrations of ammonia vapors shows its utility as a sensing material. These studies suggest that the cation exchange nanocomposite could be a good material for ammonia sensor at room temperature.
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