Issue 14, 2013
From the journal:

Physical Chemistry Chemical Physics

Post-synthesis, characterization and catalytic properties of fluorine-planted MWW-type titanosilicate†

Xiangqing Fang,a   Qiang Wang,b   Anmin Zheng,b   Yueming Liu,*a   Longfei Lin,a   Haihong Wu,a   Feng Deng,b   Mingyuan Hea  and  Peng Wu*a  

* Corresponding authors

a Shanghai Key Laboratory of Green Chemistry and Chemical Processes, Department of Chemistry, East China Normal University, North Zhongshan Rd. 3663, Shanghai, China
E-mail: ymliu@chem.ecnu.edu.cn, pwu@chem.ecnu.edu.cn
Fax: +86-21-6223-2058
Tel: +86-21-6223-2058

b Wuhan Center for Magnetic Resonance, State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics, Wuhan Institute of Physics and Mathematics, The Chinese Academy of Sciences, Wuhan 430071, China

Abstract

F-Ti-MWW was post-synthesized by implanting fluorine species into a Ti-MWW framework through an acid treatment process in the presence of ammonium fluoride. The effects of NH4F addition amount, acid treatment temperature and precursor Ti content were investigated on the incorporation of F species, the zeolite structure and the coordination sites of Ti. Fluorine-implanting improved the surface hydrophobicity of the zeolite and altered the electropositivity nearby the tetrahedral Ti sites through forming the SiO3/2F and SiO4/2F− units. The negative effect of SiO4/2F− units in F-Ti-MWW was eliminated selectively by convenient anion-exchange with various alkali chlorides. F-Ti-MWW containing the SiO3/2F units possessed better catalytic activity and reusability, and a longer catalyst lifetime than conventional Ti-MWW.

Graphical abstract: Post-synthesis, characterization and catalytic properties of fluorine-planted MWW-type titanosilicate

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Article information

DOI
https://doi.org/10.1039/C3CP44700F
Article type
Paper
Submitted
29 Dec 2012
Accepted
29 Jan 2013
First published
30 Jan 2013

Phys. Chem. Chem. Phys., 2013,15, 4930-4938

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Post-synthesis, characterization and catalytic properties of fluorine-planted MWW-type titanosilicate

X. Fang, Q. Wang, A. Zheng, Y. Liu, L. Lin, H. Wu, F. Deng, M. He and P. Wu, Phys. Chem. Chem. Phys., 2013, 15, 4930 DOI: 10.1039/C3CP44700F

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