| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 238250 | Powder Technology | 2010 | 4 Pages |
The magnetically supported heteropolyacid nanophase catalysts with the core-shell structure, in which the heteropolyacid molecules are embedded in the silica nanocoating supports, have successfully been obtained by a sol-gel incorporation technique rather than the impregnation method. The nanocomposites are composed of magnetic Fe3O4 nanophase cores, the interior silica nanocoatings as the anticorrosion layers and the exterior heteropolyacid-silica coatings. The catalytic performance of the resulted catalysts is comparable with that of pure heteropolyacids in esterification reaction of ethanol and acetic acid; in addition, the resulted catalysts can be used repeatedly without significant decrease of activity.
Graphical AbstractThe magnetically supported heteropolyacid nanophase catalysts with the core-shell structure have successfully been obtained. The nanocomposites are composed of magnetic Fe3O4 nanophase cores, the interior silica nanocoatings and the exterior heteropolyacid-silica coatings. Their catalytic performance is comparable with that of pure heteropolyacids in esterification reaction of ethanol and acetic acid.Figure optionsDownload full-size imageDownload as PowerPoint slide
