Uniformly Shaped Poly(p-phenylenediamine) Microparticles: Shape-controlled Synthesis and Their Potential Application for the Removal of Lead Ions from Water

Authors

  • Jun-Jie Wang,

    1. Division of Nanomaterials and Chemistry Hefei National Laboratory for Physical Sciences at Microscale the School of Chemistry and Materials University of Science and Technology of China, Hefei 230026 (P.R. China)
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  • Jun Jiang,

    1. Division of Nanomaterials and Chemistry Hefei National Laboratory for Physical Sciences at Microscale the School of Chemistry and Materials University of Science and Technology of China, Hefei 230026 (P.R. China)
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  • Bo Hu,

    1. Division of Nanomaterials and Chemistry Hefei National Laboratory for Physical Sciences at Microscale the School of Chemistry and Materials University of Science and Technology of China, Hefei 230026 (P.R. China)
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  • Shu-Hong Yu

    Corresponding author
    1. Division of Nanomaterials and Chemistry Hefei National Laboratory for Physical Sciences at Microscale the School of Chemistry and Materials University of Science and Technology of China, Hefei 230026 (P.R. China)
    • Division of Nanomaterials and Chemistry Hefei National Laboratory for Physical Sciences at Microscale the School of Chemistry and Materials University of Science and Technology of China, Hefei 230026 (P.R. China).
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  • This work is supported by the Natural Science Foundation of China (Grant Nos. 50732006, 20325104, 20621061, and 20671085), the 973 project (2005CB623601), the Centurial Program of the Chinese Academy of Sciences, Anhui Development Fund for Talent Personnel and Anhui Education Committee (2006Z027, ZD2007004-1), the Scientific Research Foundation for the Returned Overseas Chinese Scholars, the Specialized Research Fund for the Doctoral Program (SRFDP) of Higher Education State Education Ministry, and the Partner Group of the Chinese Academy of Sciences–the Max Planck Society. Supporting Information is available online from Wiley InterScience or from the author.

Abstract

A novel method for the shape-controlled synthesis of uniformly-shaped poly(p-phenylenediamine) (PpPD) microparticles with different morphologies under ambient condition has been developed using HAuCl4 as an oxidant and poly(N-vinylpyrrolidone) (PVP) as a surfactant. The results demonstrate that the morphologies of these microparticles can be varied from symmetrical spindle-like to diamond-like, centrosymmetric leaf-like, and parallelogram-like by tuning the concentration of reactants and their molar ratios. The length of these microparticles varies from 6 to 8 µm while the width can be tuned from 2 to 4 µm. The results demonstrate that PVP as a surfactant only plays a role in controlling the morphology of the polymer particles but has no influence on the polymer structures. UV-Vis absorption spectroscopy shows the formation of a complex between polymer ligands and lead ions by detection of new absorption peaks. Even though the as-prepared PpPD microparticles are only partly soluble, they still show an adsorptive affinity for lead ions.

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