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

Abstract

Multilamellar ZSM-5 nanosheets have been prepared using silicalite-1 as 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 result in the formation of the inter-connected mesoporosity. Methanol to gasoline (MTG) reaction has been applied as 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 the 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 for different time first at 120 °C and then at 170 °C. The characterization results show that there exists a unique process of MCM-41-like mesophases formation and then transformation to crystalline MFI phases during the certain period of crystallization.

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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, Accepted Manuscript
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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, Accepted Manuscript , DOI: 10.1039/C8NJ03629B

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