Issue 8, 2018

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

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

Supplementary files

Article information

Article type
Research Article
Submitted
22 شعبان 1439
Accepted
06 شوال 1439
First published
07 شوال 1439

Inorg. Chem. Front., 2018,5, 2031-2037

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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