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

Xiangqing Fang; Qiang Wang; Anmin Zheng; Yueming Liu; Longfei Lin; Haihong Wu; Feng Deng; Mingyuan He; Peng Wu

doi:10.1039/c3cp44700f

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

Xiangqing Fang, Qiang Wang, Anmin Zheng, Yueming Liu, Longfei Lin, Haihong Wu, Feng Deng, Mingyuan He, Peng Wu

School of Chemistry and Molecular Engineering

Research output: Contribution to journal › Article › peer-review

62 Scopus citations

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 SiO_3/2F and SiO_4/2F^- units. The negative effect of SiO_4/2F^- units in F-Ti-MWW was eliminated selectively by convenient anion-exchange with various alkali chlorides. F-Ti-MWW containing the SiO_3/2F units possessed better catalytic activity and reusability, and a longer catalyst lifetime than conventional Ti-MWW.

Original language	English
Pages (from-to)	4930-4938
Number of pages	9
Journal	Physical Chemistry Chemical Physics
Volume	15
Issue number	14
DOIs	https://doi.org/10.1039/c3cp44700f
State	Published - 13 Mar 2013

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title = "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.",

author = "Xiangqing Fang and Qiang Wang and Anmin Zheng and Yueming Liu and Longfei Lin and Haihong Wu and Feng Deng and Mingyuan He and Peng Wu",

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doi = "10.1039/c3cp44700f",

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T1 - Post-synthesis, characterization and catalytic properties of fluorine-planted MWW-type titanosilicate

AU - Fang, Xiangqing

AU - Wang, Qiang

AU - Zheng, Anmin

AU - Liu, Yueming

AU - Lin, Longfei

AU - Wu, Haihong

AU - Deng, Feng

AU - He, Mingyuan

AU - Wu, Peng

PY - 2013/3/13

Y1 - 2013/3/13

N2 - 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.

AB - 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.

UR - https://www.scopus.com/pages/publications/84876552535

U2 - 10.1039/c3cp44700f

DO - 10.1039/c3cp44700f

M3 - 文章

C2 - 23440001

AN - SCOPUS:84876552535

SN - 1463-9076

VL - 15

SP - 4930

EP - 4938

JO - Physical Chemistry Chemical Physics

JF - Physical Chemistry Chemical Physics

IS - 14

ER -

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

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