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Issue 20, 2018
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Seed-induced synthesis of multilamellar ZSM-5 nanosheets directed by amphiphilic organosilane

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Abstract

Multilamellar ZSM-5 nanosheets have been prepared using silicalite-1 as a seed in the presence of commercially available dimethyloctadecyl[3-(trimethoxysilyl)propyl]ammonium chloride (TPOAC). Characterization results show that these ZSM-5 nanosheets stack disorderly forming lamellar aggregates. Besides, there exists abundant interlayer space in these aggregates which penetrates the whole crystals and results in the formation of inter-connected mesopores. The methanol to gasoline (MTG) reaction has been applied as a probe reaction to evaluate the catalytic performance of ZSM-5 nanosheets. Compared with a ZSM-5 zeolite prepared without TPOAC, the multilamellar ZSM-5 nanosheets displayed an extraordinarily long MTG catalytic lifetime with a similar yield of gasoline range hydrocarbons, which could be reasonably attributed to the special morphology of the nanosheets. To reveal the crystallization mechanism of ZSM-5 nanosheets, the crystallization was stopped at different times first at 120 °C and then at 170 °C. The characterization results show that there exists a unique process of MCM-41-like mesophase formation and then transformation to crystalline MFI phases during a certain period of crystallization.

Graphical abstract: Seed-induced synthesis of multilamellar ZSM-5 nanosheets directed by amphiphilic organosilane

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Publication details

The article was received on 25 Jul 2018, accepted on 10 Sep 2018 and first published on 10 Sep 2018


Article type: Paper
DOI: 10.1039/C8NJ03629B
Citation: New J. Chem., 2018,42, 17043-17055
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    Seed-induced synthesis of multilamellar ZSM-5 nanosheets directed by amphiphilic organosilane

    C. Fan, Y. Wang, H. Li, X. Wang, C. Sun, X. Zhang, C. Wang and S. Wang, New J. Chem., 2018, 42, 17043
    DOI: 10.1039/C8NJ03629B

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