Electroless plating of copper on fly ash cenospheres using polyaniline-Pd activation

Authors

  • Wei Wang,

    1. State Key Laboratory of Pollution Control and Resource Reuse, and School of the Environment, Nanjing University, Nanjing, P. R. of China
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  • Qin Li,

    1. State Key Laboratory of Pollution Control and Resource Reuse, and School of the Environment, Nanjing University, Nanjing, P. R. of China
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  • Jianping Zhai

    Corresponding author
    • State Key Laboratory of Pollution Control and Resource Reuse, and School of the Environment, Nanjing University, Nanjing, P. R. of China
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Correspondence to: Jianping Zhai, State Key Laboratory of Pollution Control and Resource Reuse, and School of the Environment, Nanjing University, Nanjing 210046, P. R. of China.

E-mail: jpzhai@nju.edu.cn

Abstract

The polyaniline of different intrinsic oxidation states, viz., the emeraldine (EM) and the leucoemeraldine (LM) states, were coated on 3-aminopropyltriethoxy silane modified fly ash cenospheres. Without prior sensitization by SnCl2 solution, Pd activation by PdCl2 solution was carried out on EM and LM laden cenospheres, followed by electroless plating of copper (Cu). The topography and composition of the composites were characterized by scanning electron microscopy, X-ray diffraction, and X-ray photoelectron spectroscopy, etc. The results indicate that the oxidation state of the LM layer showed a much bigger increase than that of the EM layer in the Pd activation process, while coupled Pd reduction underwent to a more extent on the LM layer. The metallic Pd atoms on the LM and EM layers surface initiated the subsequent electroless plating of Cu, and the coated Cu on LM laden cenospheres had a much more uniform and compact morphology than that on EM laden cenospheres. Copyright © 2012 John Wiley & Sons, Ltd.

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