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Synthesis and properties of magnetite/polypyrrole core–shell nanocomposites and polypyrrole hollow spheres

✍ Scribed by K.-M. Mangold; J. Schuster; C. Weidlich

Publisher
Elsevier Science
Year
2011
Tongue
English
Weight
568 KB
Volume
56
Category
Article
ISSN
0013-4686

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✦ Synopsis

In this work a new route for preparation of core-shell nanoparticles composed of an iron oxide core and a polypyrrole (PPy) shell is explored. During the preparation procedure the initially formed iron(0) core is converted to magnetite. It is demonstrated, that the magnetite cores can completely be dissolved by reaction with acid. Furthermore the dissolution of iron oxide cores by electrolysis also is possible. The resulting PPy hollow spheres as well as the core-shell nanocomposites are electrochemically active.

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## Abstract Polypyrrole‐silica nanoparticles were prepared by in situ polymerization of pyrrole monomer in the presence of specially modified silica nanoparticles having vinyl functional groups on the surface. The presence of polypyrrole (PPy) on the surface of silica nanoparticles was confirmed us