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Frontiers of Chemical Science and Engineering >> 2016, Volume 10, Issue 4 doi: 10.1007/s11705-016-1596-9

Fabrication of MIL-100(Fe)@SiO

Key Laboratory of the Ministry of Education for Advanced Catalysis Materials, Institute of Physical Chemistry, Zhejiang Normal University, Jinhua 321004, China

Accepted: 2016-11-09 Available online: 2016-11-29

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Abstract

Heterogeneous catalysts with convenient recyclability and reusability are vitally important to reduce the cost of catalysts as well as to avoid complex separation and recovery operations. In this regard, magnetic MIL-100(Fe)@SiO @Fe O microspheres with a novel core-shell structure were fabricated by the self-assembly of a metal-organic MIL-100(Fe) framework around pre-synthesized magnetic SiO @Fe O particles under relatively mild and environmentally benign conditions. The catalytic activity of the MIL-100(Fe)@SiO @Fe O catalyst was tested for the liquid-phase acetalization of benzaldehyde and glycol. The MIL-100(Fe)@SiO @Fe O catalyst has a significant amount of accessible Lewis acid sites and therefore exhibited good acetalization catalytic activity. Moreover, due to its superparamagnetism properties, the heterogeneous MIL-100(Fe)@SiO @Fe O catalyst can be easily isolated from the reaction system within a few seconds by simply using an external magnet. The catalyst could then be reused at least eight times without significant loss in catalytic efficiency.

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