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Indexed by:期刊论文

Date of Publication:2016-04-01

Journal:JOURNAL OF POROUS MATERIALS

Included Journals:SCIE、EI

Volume:23

Issue:2

Page Number:407-413

ISSN No.:1380-2224

Key Words:TS-1; Hierarchical porous; Mesoporous; Miroporous; Cyclohexene epoxidation; Aerosol

Abstract:Hierarchical titanosilicate composites (HTS) have been synthesized by an aerosol spray method, by which TS-1 nanoparticles were assembled with cetyl trimethyl ammonium bromide and tetraethylorthosilicate/tetra-n-butyl titanate to form a hierarchical porous composites with a core-shell structure. The structure, porosity, morphology and composition of the materials were characterized by X-ray diffraction, nitrogen adsorption isotherm, Raman spectroscopy, electron microscopy and X-ray fluorescence spectroscopy. The hierarchical porous molecular sieve combines the advantages of TS-1 and Ti-KIT-1, and shows high activity and selectivity to epoxide in cyclohexene epoxidation with H2O2. The yield of cyclohexene oxide on HTS is much higher than those on TS-1 and Ti-KIT-1. The selectivities to cyclohexene oxide and 1,2-cyclohexanediol can be adjusted by varying the titanium contents of the HTS samples.