Comparative sensing of aldehyde and ammonia vapours on synthetic polypyrrole-Sn(IV)arsenotungstate nanocomposite cation exchange material

Khan, A.A. and Ahmad, R. and Zeeshan, M. (2017) Comparative sensing of aldehyde and ammonia vapours on synthetic polypyrrole-Sn(IV)arsenotungstate nanocomposite cation exchange material. Analytical Chemistry Research, 12. pp. 52-64. ISSN 22141812

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Abstract

Polypyrrole-Sn(IV)arsenotungstate (PPy-SnAT) conductive nanocomposite cation exchange have been synthesized by in-situ chemical oxidative polymerization of polypyrrole with Sn(IV)arsenotungstate (SnAT). PPy-SnAT nanocomposite was characterized by Fourier transform infra-red spectroscopy (FTIR), X-Ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), energy-dispersive x-ray (EDX) and thermogravimetric analysis (TGA). The ion exchange capacity (IEC) and DC electrical conductivity of nanocomposite was found to be 2.50 meq/g and 5.05 × 10−1 S/cm respectively. The nanocomposite showed appreciable isothermal stability in terms of DC electrical conductivity retention under ambient condition up to 130 °C. The nanocomposite cation exchange based sensor for detection of formaldehyde and ammonia vapours were fabricated at room temperature. It was revealed that the resistivity of the nanocomposite increases on exposure to higher percent concentration of ammonia and lower concentration of formaldehyde at room temperature (25 °C).

Item Type: Article
Uncontrolled Keywords: Electrical conductivity; Isothermal stability; Polypyrrole nanocomposite; Vapour sensing
Subjects: T Technology > T Technology (General)
Divisions: Faculties > Faculty of Engineering and Technology > Zakir Husain College of Engineering & Technology > Department of Applied Chemistry
Depositing User: AMU Library
Date Deposited: 08 Feb 2018 05:49
Last Modified: 08 Feb 2018 06:39
URI: http://ir.amu.ac.in/id/eprint/11230

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