Issue 5, 2015

Electrical conductivity, isothermal stability and amine sensing studies of a synthetic poly-o-toluidine/multiwalled carbon nanotube/Sn(iv) tungstate composite ion exchanger doped with p-toluene sulfonic acid

Abstract

An electrically conductive poly-o-toluidine (POT) composite doped with p-toluene sulfonic acid (pTSA) was prepared using multiwalled carbon nanotubes (MWCNTs) and Sn(IV) tungstate (ST) by in situ oxidative polymerization. The pTSA-doped POT, POT/MWCNT and POT/MWCNT/ST composites were characterized by Fourier-transform infrared spectrometry, X-ray diffraction, scanning electron microscopy, transmission electron microscopy, UV-visible spectrometry and thermogravimetric analysis. The thermogravimetric analysis studies showed that the POT/MWCNT/ST composite was thermally more stable than the pure polymer and the POT/MWCNT composite. The electrical conductivity behaviour of the POT/MWCNT composite was better than that of pure POT and the POT/MWCNT/ST composite. Ammonia and amine vapour sensing studies of the POT/MWCNT/ST composite ion exchangers showed an improved performance.

Graphical abstract: Electrical conductivity, isothermal stability and amine sensing studies of a synthetic poly-o-toluidine/multiwalled carbon nanotube/Sn(iv) tungstate composite ion exchanger doped with p-toluene sulfonic acid

Article information

Article type
Paper
Submitted
08 Dec 2014
Accepted
21 Jan 2015
First published
21 Jan 2015

Anal. Methods, 2015,7, 2077-2086

Author version available

Electrical conductivity, isothermal stability and amine sensing studies of a synthetic poly-o-toluidine/multiwalled carbon nanotube/Sn(IV) tungstate composite ion exchanger doped with p-toluene sulfonic acid

A. A. Khan and S. Shaheen, Anal. Methods, 2015, 7, 2077 DOI: 10.1039/C4AY02911A

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