| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 237225 | Powder Technology | 2012 | 6 Pages |
Nanocomposites with core/shell structure composed of hematite (α-Fe2O3), polypyrrole (PPy) and silver have been successfully synthesized with a three-step reaction process. First, semispherical cores of α-Fe2O3 were prepared by the forced hydrolysis of FeCl3. Next, pyrrole was polymerized in the suspension of α-Fe2O3 and then composite carrier with α-Fe2O3 as core and PPy as shell was produced. Last, a surface reduction-oxidation was carried out between PPy and silver nitrate so as to produce α-Fe2O3/PPy/Ag nanocomposites. The as-prepared nanoparticles were characterized by transmission electron microscopy (TEM), X-ray diffraction (XRD), Fourier transform infrared (FTIR) spectroscopy and cyclic voltammogram (CV), furthermore, the effects of reaction conditions on the morphology of nanocomposites were studied in detail. The α-Fe2O3/PPy/Ag nanocomposites exhibit excellent electrochemical activity and chemical catalytic properties in the reduction reaction of m-nitrobenzene sulfonic sodium (m-NBS) at room temperature. To our knowledge, the α-Fe2O3/PPy/Ag nanocomposites have not been reported.
Graphical abstractFigure optionsDownload full-size imageDownload as PowerPoint slideHighlights► Nanocomposites composed of hematite, polypyrrole and silver were synthesized. ► A surface redox between PPy and silver salt was used. ► The nanocomposites were with typical core/shell structure. ► Nanocomposites showed good electrochemical property. ► Nanocomposites present catalytic activity in the reduction of m-NBS.
