Abstract
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.
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Acknowledgements
The authors are thankful to the Department of Applied Chemistry, Z.H. College of Engineering and Technology, A.M.U. (Aligarh) for providing research facilities. They are also thankful to the Ministry of Environment & Forest, Government of India for financial support. Assistance provided by the AIIMS, I.I.T. Delhi, and I.I.T. Roorkee in carrying out instrumental analysis is also acknowledged.
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Khan, A.A., Paquiza, L. & Khan, A. An advanced nano-composite cation-exchanger polypyrrole zirconium titanium phosphate as a Th(IV)-selective potentiometric sensor: preparation, characterization and its analytical application. J Mater Sci 45, 3610–3625 (2010). https://doi.org/10.1007/s10853-010-4407-6
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DOI: https://doi.org/10.1007/s10853-010-4407-6