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In the present study, a new technique to synthesize composites of poly(methyl methacrylate) cerium molybdate (PMMA-CeMoO4) is reported. The study concerns the characterization of poly(methyl methacrylate; PMMA) and PMMA-CeMoO4 nanocomposites are also discussed. The physical properties of the material were described using TGA-DTA, FTIR, X-ray, TEM, and SEM studies. The adsorption efficiency towards heavy metal ions was determined by distribution studies and material was found to be highly selective for lead, a heavy toxic metal ion, indicating the utility of the synthesized material for the removal of this ion from the waste stream. The material was used as electroactive component for the construction of an ion-selective membrane electrode. The membrane electrode was mechanically stable, having wide dynamic range, with quick response time and could be operated for at least 5 months without any considerable divergence in the potential response characteristics. The electrode was successfully used as indicator electrode in complexation titrations. © 2012 Wiley Periodicals, Inc. J. Appl. Polym. Sci., 2013 [ABSTRACT FROM AUTHOR]

Abstract: The objective of the present research was to synthesize, characterize and to investigate the efficiency of an advanced class of hybrid nano-composite cation exchanger for the detection of mercury(II) ion in aqueous solution. In the present study the cation exchanger ployaniline–zirconium titanium phosphate (PANI–ZTP) nanocomposite, was synthesized via sol–gel mixing of organic polymer polyaniline (PANI) into the matrices of the inorganic precipitate of zirconium titanium phosphate (ZTP), having extraordinary ion exchange capacity, thus used as electroactive component for the construction of an ion-selective membrane electrode. The proposed electrode shows fairly good discrimination of mercury ion over several other inorganic ions. The membrane electrode was mechanically stable, having wide dynamic range of 10−10 mol/m3 to 10−1 mol/m3 of Hg2+ ions, with quick response time and could be operated for at least 4months without any considerable divergence in the potential response characteristics. The electrode was successfully applied for direct determination of mercury ions in some real sample with satisfactory results and acts as indicator electrode in complexation titrations. [Copyright &y& Elsevier]

Polypyrrole has emerged as one of the highly pursued conducting polymers owing to its high electrical conductivity and good environmental stability. In spite of its excellent electrical properties, the chemical and thermal stability and processability are not very satisfactory. The incorporation of a polymer material into an inorganic ion-exchanger provides a high class of hybrid ion-exchangers with enhanced ion-exchange properties, high reproducibility, high stability, and good selectivity for heavy metals. A novel organic–inorganic composite-polypyrrole zirconium titanium phosphate has been synthesized using zirconium titanium phosphate, which is an advanced inorganic ion-exchange material with the qualities listed above. The physicochemical properties of this composite material are characterized by X-ray, TGA–DTA, AAS, FTIR, SEM, and TEM. The ion-exchange capacity, pH titrations, elution, and chemical stability were determined to study ion-exchange properties of the material. Distribution studies for various metal ions revealed that the nano-composite is highly selective for Th(IV). An ion-selective membrane electrode was fabricated using this material for the determination of Th(IV) ions in solutions. The analytical utility of this electrode was established by employing it as an indicator electrode in electrometric titrations. [ABSTRACT FROM AUTHOR]