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Umair Baig,Asif Ali Khan 한국공업화학회 2015 Journal of Industrial and Engineering Chemistry Vol.29 No.-
Polyurethane-cerium(IV) phosphate composite cation exchange membranes were prepared by solutioncasting method in different stoicheometric ratios of polyurethane and cerium(IV) phosphate. Thestructure and morphology of the prepared membranes were ascertained by FTIR, SEM, TGA and DTA. Themembrane having composition 1:2 (PU: cerium(IV) phosphate) shows best results for ion-exchangecapacity, water content, porosity, thickness and swelling. The Cu(II) selective electrode was developed byusing this membrane for the determination of Cu(II) in solutions. The accuracy of the procedure has beentested on drinking water samples spiked with known amounts of Cu(II) and results were comparable tothose generated by Atomic Absorption Spectrophotometer.
Asif Ali Khan,Umair Baig 한국공업화학회 2012 Journal of Industrial and Engineering Chemistry Vol.18 No.6
PVC supported membranes of polyaniline–titanium(IV)phosphate (PANI–TiP) cation exchange nanocomposite were prepared by solution casting method in different stoichiometric ratios of PVC and PANI–TiP. The structure and morphology of the prepared membrane were ascertained by FTIR, SEM and TGA–DTA. The membrane having a composition 1:1 (PVC:PANI–TiP) shows best results for electrical conductivity, water content, porosity, thickness and swelling. The Pb(II) selective electrode was developed by using this membrane for the determination of lead in solutions. The membrane electrode was mechanically stable, having wide dynamic range, with quick response time and could be operated for at least 5 months.
Asif Ali Khan,Umair Baig,Mohd. Khalid 한국공업화학회 2013 Journal of Industrial and Engineering Chemistry Vol.19 No.4
Electrically conductive polyaniline-titanium(IV)molybdophosphate (PANI-TMP) cation exchange nanocomposite was studied as sensing material for aliphatic alcohols (methanol, ethanol and 1-propanol) at room temperature. The nanocomposite was synthesized by sol–gel mixing of polyaniline (PANI) into inorganic precipitate of titanium(IV)molybdophosphate (TMP) and characterized by Fourier transform infrared (FTIR) spectroscopy, scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray diffraction analysis (XRD), thermogravimetric analysis (TGA) and ultravioletvisible spectroscopy (UV-Vis). The composite showed good ion-exchange capacity, electrical conductivity and resistivity response towards alcohol vapours. It was observed that the sensor show good reversible response towards methanol vapours compared to ethanol and 1-propanol vapours. These studies suggest that the nanocomposite cation exchanger could be a good sensing material for methanol vapours at room temperature (25 8C).