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Issue 45, 2014
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Preparations and characterizations of poly-o-toluidine/multiwalled carbon nanotubes/Sn(iv) tungstate composite ion exchange thin films and their application as a Pb(ii) selective electrode

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Abstract

Poly-o-toluidine (POT), poly-o-toluidine (POT)/multiwalled carbon nanotubes (MWCNTs), and poly-o-toluidine (POT)/multiwalled carbon nanotubes (MWCNTs)/Sn(IV) tungstate (ST) thin films were prepared by a solution casting method using polystyrene as a binder. The ion exchange capacity (IEC) of the POT/MWCNTs/ST thin film was found 1.05 meq g−1, which is better than the IEC of pure POT (0.7 meq g−1) and POT/MWCNTs (0.9 meq g−1). The formation of POT, POT/MWCNTs and POT/MWCNTs/ST ion exchange thin films were characterized by scanning electron microscopy (SEM), Energy-Dispersive X-ray (EDX), Fourier transform infra-red (FTIR), X-ray diffraction (XRD) and thermogravimetric analysis (TGA). On the basis of results obtained from the distribution co-efficient (Kd) values, a Pb(II) selective electrode of POT/MWCNTs/ST thin films was fabricated. A linear response in the concentration range of 1 × 10−9 to 1 × 10−1 M Pb(II) by using the POT/MWCNTs/ST thin film electrode was obtained.

Graphical abstract: Preparations and characterizations of poly-o-toluidine/multiwalled carbon nanotubes/Sn(iv) tungstate composite ion exchange thin films and their application as a Pb(ii) selective electrode

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Publication details

The article was received on 24 Feb 2014, accepted on 15 May 2014 and first published on 03 Jun 2014


Article type: Paper
DOI: 10.1039/C4RA01594K
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RSC Adv., 2014,4, 23456-23463

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    Preparations and characterizations of poly-o-toluidine/multiwalled carbon nanotubes/Sn(IV) tungstate composite ion exchange thin films and their application as a Pb(II) selective electrode

    A. A. Khan and S. Shaheen, RSC Adv., 2014, 4, 23456
    DOI: 10.1039/C4RA01594K

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