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Cation-exchange kinetic studies on poly-o-toluidine Ce(IV) phosphate: a nano-composite and electrical conducting material

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Abstract

An advanced cation-exchange nano-composite poly-o-toluidine Ce(IV) phosphate was synthesized by sol–gel technique by incorporating Ce(IV) phosphate precipitate with the matrix of poly-o-toluidine. The material showed good ion-exchange behavior and used successfully in separation of metal ions. The conductivity of the composite was found within the range of 10−2 to 10−3 S/cm−1; measured by four-in-line probe DC electrical conductivity measuring technique. The conductivity is at the border of metallic and semiconductor region. Ion-exchange kinetics for few divalent metal ions was evaluated by particle diffusion-controlled ion-exchange phenomenon at four different temperatures. The particle diffusion mechanism is confirmed by the linear τ (dimensionless time parameter) versus t (time) plots. The exchange processes thus controlled by the diffusion within the exchanger particle for the systems studies herein. Some physical parameters like self-diffusion coefficient (D 0), energy of activation (E a), and entropy of activation (∆S°) have been evaluated under conditions favoring a particle diffusion-controlled mechanism.

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Acknowledgements

The authors are thankful to the Chairman, Department of Applied Chemistry, Z.H. College of Engineering and Technology, A.M.U. (Aligarh) and also to the U.G.C. funded research project for providing financial assistance.

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Authors and Affiliations

  1. Analytical and Polymer Research Laboratory, Department of Applied Chemistry, Faculty of Engineering and Technology, Aligarh Muslim University, Aligarh, 202002, India

    Asif Ali Khan & Tabassum Akhtar

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  1. Asif Ali Khan
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  2. Tabassum Akhtar
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Correspondence to Asif Ali Khan.

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Khan, A.A., Akhtar, T. Cation-exchange kinetic studies on poly-o-toluidine Ce(IV) phosphate: a nano-composite and electrical conducting material. J Mater Sci 47, 3241–3247 (2012). https://doi.org/10.1007/s10853-011-6162-8

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  • DOI: https://doi.org/10.1007/s10853-011-6162-8

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