Preperation and Characterization of Monolayered or Two-layered Titania Modified Mesoporous Molecular Sieves MCM-41

Abstract

Abstract: Two kinds of titania modified the inner surface of mesoporous slilcate MCM-41 (MCM-TiO₂ and MCM-Ti-TiO₂) were synthesized by precursor
tetrabutyltitanate and calcined MCM-41. The samples were characterized by XRD, FTIR, nitrogen adsorption/desorption at 77K and solid state diffuse
reflectance UV-vis spectroscopy. XRD suggested that a long-range a long-range order kept in the hexagonal phase of titania modified MCM-41. Tetrabutyltitanate
cocondensation with the pendant OH groups of MCM-41 via Si--O--Ti bonds and titania modified the inner walls of MCM-41. Titania on the inner walls of
modified MCM-41 was estimated monolayer or two-layer according to the results of nitrogen adsorption/desorption isotherms. In UV-vis spectra,
titania modified MCM-41 had significant blue shift compared to bulk TiO₂ which is attributed to the well known quantum size effect for semiconductor as the
particle size decreases.

Key words: mesoporous molecular sieve, MCM-41, TiO₂, titania-modified MCM-41

CLC Number:

O611

ZHENG Shan,GAO Lian,GUO Jing-Kun. Preperation and Characterization of Monolayered or Two-layered Titania Modified Mesoporous Molecular Sieves MCM-41[J]. Journal of Inorganic Materials.

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Preperation and Characterization of Monolayered or Two-layered Titania Modified Mesoporous Molecular Sieves MCM-41

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