Synthesis and Characterization of Polypyrrole-Au Coated SiO2@Poly(4-vinylpyridine) Composites

摘要

Microspheres with silica as core and poly(4-vinylpyridine) (P4VP) as shell were synthesized. AuCl_4~- ions were bound by P4VP chains to form the complex, which acted both as an oxidant of pyrrole monomers and as a source of Au atoms. By vapor phase polymerization, the PPy and Au nanoparticles were simultaneously formed on the surfaces of SiO_2@P4VP microspheres. The core-shell structure was confirmed by transmission electron microscopy. The surface morphologies of the composites were observed by scanning electron microscopy. The molecular structures of composites were characterized in detail by Raman spectra, X-ray diffraction, and X-ray photoelectron spectroscopy.