A new way of synthesis nanohybrid cation-exchanger applicable for membrane electrode

Abstract

A novel polymeric composite namely, PANI-PW/Ag (silver doped polyaniline phosphotungstate) was expediently obtained by sol-gel method. PANI-PW/Ag was characterized by Fourier transform infrared spectroscopy, X-ray powder diffraction, UV-vis spectrophotometry, scanning electron microscopy, and thermogravimertic analysis. On the basis of ion exchange capacity and distribution studies, PANI-PW/Ag, highly selective and sensitive to Cu(II), was used for the preparation of ion selective membrane for Cu(II). The electrode exhibits good potentiometric response for Cu(II) over a wide concentration range (1.0 × 10-1-5.0 × 10-6 mol) with Nernstian slope of 27.8 mV per decade. Response time of the electrode is 9 s and it could be used for a period of 3 month and exhibits good selectivity toward Cu 2+ in comparison to alkali, alkaline earth, transition, and heavy metal ions, with no interference caused by other heavy metals. © 2013 Society of Plastics Engineers.