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Issue 8, 2018
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A novel synthetic strategy of Fe-ZSM-35 with pure framework Fe species and its formation mechanism

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Abstract

Fe-ZSM-35, as a zeolite with ferrierite-like structure, is an important catalyst in industry, and it is usually very difficult to obtain through conventional methods. Understanding the semi-crystallized structure at the nanoscale is the key to control their properties and design the best materials for their ever increasing uses. Herein, we report a novel and controllable method for the synthesis of Fe-ZSM-35 with pure framework Fe species; the essence of this novel synthetic method is a two-step static hydrothermal process. Initially, semi-crystallized Fe-containing species and a semi-crystallized ZSM-35 structure are prepared, then the two semi-crystallized materials are mixed and crystallized to give Fe-ZSM-35 zeolite. This method can almost eliminate the retarding crystallization effect of hetero Fe and is beneficial for a high content of Fe to be incorporated into the ZSM-35 framework. The formation mechanism of Fe-ZSM-35 zeolite was also investigated by UV Raman spectroscopy in combination with X-ray powder diffraction and UV-vis diffuse reflectance spectroscopy. The studies indicate that the Fe-containing aluminate-silica gel was initially mixed with the semi-crystallized ZSM-35 structure fragments to generate the Fe-ZSM-35 structure, and this method may be extended to the other metal-hetero zeolites.

Graphical abstract: A novel synthetic strategy of Fe-ZSM-35 with pure framework Fe species and its formation mechanism

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Publication details

The article was received on 08 May 2018, accepted on 20 Jun 2018 and first published on 21 Jun 2018


Article type: Research Article
DOI: 10.1039/C8QI00432C
Citation: Inorg. Chem. Front., 2018,5, 2031-2037
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    A novel synthetic strategy of Fe-ZSM-35 with pure framework Fe species and its formation mechanism

    X. Ju, F. Tian, Y. Wang, F. Fan, Z. Feng and C. Li, Inorg. Chem. Front., 2018, 5, 2031
    DOI: 10.1039/C8QI00432C

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