title: Ammonia vapor sensing properties of polyaniline-titanium(IV)phosphate cation exchange nanocomposite.
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.
authors.affiliation: Analytical and Polymer Research Laboratory, Department of Applied Chemistry, F/o Engg. & Tech., Aligarh Muslim University, Aligarh 202 002, UP, India. asifalikhan2008@gmail.com
authors.forename: Asif Ali
authors.initials: AA
authors.lastname: Khan
authors.forename: Umair
authors.initials: U
authors.lastname: Baig
authors.forename: Mohd
authors.initials: M
authors.lastname: Khalid
mesh_terms: D000641:Ammonia / Q000032:analysis*; D000814:Aniline Compounds / Q000737:chemistry*; D004553:Electric Conductivity; D005740:Gases / Q000032:analysis; D007475:Ion Exchange Resins; D008855:Microscopy, Electron, Scanning; D046529:Microscopy, Electron, Transmission; D053761:Nanocomposites; D017550:Spectroscopy, Fourier Transform Infrared; D014025:Titanium / Q000737:chemistry*
chemical_list: D000814:Aniline Compounds; D005740:Gases; D007475:Ion Exchange Resins; C416807:polyaniline; C036532:titanium phosphate; D000641:Ammonia; D014025:Titanium