Method for preparing mesoporous titanium silicon molecular sieve nanoparticles

Abstract

The invention relates to a method for preparing mesoporous titanium silicon molecular sieve nanoparticles, aiming at solving the technical problem that the mesoporous titanium silicon material particles prepared by hydro-thermal synthesis are larger in size. The method comprises the steps of: sequentially adding hexadecyl trimethyl ammonium bromide (HTAB), polyquaternium-6 and ammonia water into deionized water, and evenly mixing to obtain a mixed solution; then, adding tetraethoxysilane and tetrabutyl titanate into the mixed solution dropwise, and continuously stirring to obtain precursor solution; carrying out hydrothermal treatment on the precursor solution, separating out solid phase substance, washing and drying; and finally, putting the dried solid phase substance in a muffle furnace for calcination to obtain the mesoporous titanium silicon molecular sieve nanoparticles. The mesoporous titanium silicon molecular sieve nanoparticles have the average size of less than 100nm, the mesoporous aperture of 2-3.5nm and the specific surface area of 300-850m<2>/g, and can be used for macromolecular catalytic fine chemical engineering and pharmaceutical synthesis fields.

Description

technical field [0001] The invention relates to a method for preparing a mesoporous titanium-silicon molecular sieve. Background technique [0002] Since Mobil first developed the M41S series of materials in 1992, mesoporous SiO 2 Because of its regular pore channels, large specific surface area and adjustable pore size, it has broad application prospects in the fields of ion exchange, adsorption and separation, host-guest chemistry, and industrial catalysis, and has gradually become a research hotspot of mesoporous materials. A large number of studies have shown that the introduction of transition metal elements into mesoporous SiO 2 Mesoporous catalytic materials with high activity and high selectivity can be obtained in the skeleton. Among them, mesoporous titanium-silicon materials containing metal titanium have been the focus of research because of their unique properties in many catalytic reactions. [0003] Usually, mesoporous TiSi materials can be synthesized by h...

AI Technical Summary

Problems solved by technology

Studies have shown that the particle size of the existing mesoporous titanium-silicon materials is mostly in the micron range. Due to the large particle size, the contact frequency between the reactant and the active center in the catalytic reaction is low, so that its catalytic performance cannot be achieved. well played, which limits its wider application

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