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Title: CoFe2O4 nanocrystals mediated crystallization strategy for magnetic functioned ZSM-5 catalysts
Authors: Li, Bin
Yildirim, Erol
Li, Wei
Qi, Dianpeng
Yu, Jiancan
Wei, Jiaqi
Liu, Zhiyuan
Sun, Zhenkun
Liu, Yong
Kong, Biao
Xue, Zhaoteng
Liu, Zhuangjian
Yang, Shuo-Wang
Chen, Xiaodong
Zhao, Dongyuan
Keywords: Engineering::Materials
Issue Date: 2018
Source: Li, B., Yildirim, E., Li, W., Qi, D., Yu, J., Wei, J., . . ., Zhao, D. (2018). CoFe2O4 Nanocrystals Mediated Crystallization Strategy for Magnetic Functioned ZSM‐5 Catalysts. Advanced Functional Materials, 28(32), 1802088-. doi:10.1002/adfm.201802088
Journal: Advanced Functional Materials 
Abstract: Zeolites have many applications in the petrochemical and fine chemical industry and their functionalization does expand the spectrum of potentials. However, the integration of functional nanocrystals into zeolite frameworks with controlled size, dispersion, and crystallization behavior still remains a significant challenge. Here, a new synthesis of magnetic functioned ZSM-5 zeolite catalysts via a CoFe2O4 nanocrystal mediated crystallization strategy is reported. It is found that high crystallinity of CoFe2O4 nanocrystals results in a well-dispersed encapsulation of them into a single-crystal of ZSM-5 due to non-further-grown nanocrystals during the fast ZSM-5 growth. On the contrary, low crystallinity of CoFe2O4 nanocrystals leads to the polycrystalline zeolite growth due to the secondary growth of nanocrystals accompanied by the zeolite crystallization and large lattice mismatch between them. The successful encapsulation of small CoFe2O4 nanocrystals (≈4 nm) into single crystals lies on the preattachment of them into solid silica gel. During the growth of ZSM-5 crystals, no secondary growth of nanocrystals happens and its motion is restricted. The encapsulation of magnetic CoFe2O4 nanocrystals not only endows magnetic function into zeolites for the first time, but also does not impact catalytic performance of ZSM-5 in acetalization of cyclohexanone with methanol, which is highly promising in catalytic industries.
ISSN: 1616-301X
DOI: 10.1002/adfm.201802088
Schools: School of Materials Science & Engineering 
Rights: © 2018 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim. All rights reserved. This paper was published in Advanced Functional Materials and is made available with permission of WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.
Fulltext Permission: open
Fulltext Availability: With Fulltext
Appears in Collections:MSE Journal Articles

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