A study on the magnetically supported heteropolyacid nanophase catalysts

作者：Yuan, Jiongliang^*; Yue, Pan; Wang, Lanlan

来源：Powder Technology, 2010, 202(1-3): 190-193.

DOI：10.1016/j.powtec.2010.04.020

• Magnetic particle
• Heteropolyacid
• Silica
• Sol-gel incorporation
• Nanophase catalyst
• Catalytic performance

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 Fe(3)O(4) 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.

• 出版日期2010-10
• 单位北京化工大学