Coating Polypyrrole-Silver Nanocomposites on Sulfonated-Polystyrene Microspheres by One-Step Method Using AgNO3 as an Oxidant

By : Guohong Ren, Wenqin Wang, Yanqiong Yang, Wujin Cai, Zhong-Ren Chen

Page No: 135-144

Abstract
The sulfonated polystyrene (PS) microspheres were used as templates and AgNO3 was acted as the oxidant of pyrrole to prepare PS@polypyrrole(PPy)-silver nanocomposite microspheres by the one-step synthesis method. Ag+ ions adsorbed on the negatively charged sulfonated PS microspheres were reduced to elemental Ag, and PPy was obtained on the PS surfaces simultaneously, resulting in formation of PS core@PPy-silver composite shell microspheres. After removal of PS cores, uniform hollow PPy-silver composite microspheres were obtained. The thickness of the shell was controlled by varying the amounts of pyrrole monomers. The products were characterized in detail by transmission electron microscope (TEM), scanning electron microscope (SEM), Fourier-transform infrared spectroscopy (FT-IR), X-ray Photoelectron Spectroscope (XPS), X-ray diffraction (XRD), and thermogravimetry (TG).

Authors :
Guohong Ren, Wenqin Wang, Yanqiong Yang, Wujin Cai and Zhong-Ren Chen : Faculty of Materials Science and Chemical Engineering, Ningbo University, Ningbo 315211, People’s Republic of China.