NDLI: Synthesis of magnetically recyclable MOF-5@SiO$_{2}$@Fe$_{3}$O$_{4}$ catalysts and their catalytic performance of Friedel

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Synthesis of magnetically recyclable MOF-5@SiO$_{2}$@Fe$_{3}$O$_{4}$ catalysts and their catalytic performance of Friedel–Crafts alkylation

Content Provider	Springer Nature Link
Author	Li, Qingyuan Jiang, Sai Ji, Shengfu Shi, Da Li, Hongkun
Copyright Year	2015
Abstract	Magnetic Fe$_{3}$O$_{4}$ particles were synthesized by solvo-thermal method, and then hydrolysis method was used to encapsulate a compact layer of SiO$_{2}$ on the surface of Fe$_{3}$O$_{4}$ particles. Finally, the magnetic MOF-5@SiO$_{2}$@Fe$_{3}$O$_{4}$ catalysts were prepared by in situ coating different contents of MOF-5 on the surface of SiO$_{2}$@Fe$_{3}$O$_{4}$ particles. The as-synthesized samples were characterized by TEM, SEM, XRD, FT-IR, N$_{2}$ adsorption/desorption, VSM and NH$_{3}$-TPD. The catalytic activities of the magnetic MOF-5@SiO$_{2}$@Fe$_{3}$O$_{4}$ catalysts for the Friedel–Crafts alkylation of toluene with benzyl chloride were evaluated. The results showed that magnetic MOF-5@SiO$_{2}$@Fe$_{3}$O$_{4}$ catalysts exhibited superparamagnetic property, and could be separated by a magnet from the liquid reaction system. The conversion of toluene was increased gradually with the increase of catalyst contents and reaction temperature, respectively. 97 % conversion of toluene has been achieved by using 26.8 %MOF-5@SiO$_{2}$@Fe$_{3}$O$_{4}$ catalyst at 120 °C for 6 h. Furthermore, electron-donating group, such as –OCH$_{3}$, and –CH$_{3}$, exhibited positive effect on the alkylation reaction. Besides, the catalyst could be easily separated from the reaction mixture after the reaction and reused for five times without significant decrease in activity.
Starting Page	1205
Ending Page	1214
Page Count	10
File Format	PDF
ISSN	13802224
Journal	Journal of Porous Materials
Volume Number	22
Issue Number	5
e-ISSN	15734854
Language	English
Publisher	Springer US
Publisher Date	2015-06-18
Publisher Place	New York
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Magnetic MOF-5 Catalyst Friedel–Crafts Alkylation Catalysis Characterization and Evaluation of Materials Physical Chemistry
Content Type	Text
Resource Type	Article
Subject	Mechanics of Materials Materials Science Mechanical Engineering

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