Coating PoiypyrroIe-SilverNanocomposites on Sulfonated-Polystyrene Microspheres by One-Step Method Using AgNO3 as an Oxidant

摘要

The sulfonated polystyrene (PS) microspheres were used as templates andAgNO3 was acted as the oxidant of pyrrole to prepare PS@polypyrrole(PPy)-silvernanocomposite 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-siiver 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).