Issue 14, 2013

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

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

Supplementary files

Article information

Article type
Paper
Submitted
29 Dec 2012
Accepted
29 Jan 2013
First published
30 Jan 2013

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

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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