Mesoporous silica nanosphere with ultrahigh specific surface area and preparation method thereof

Abstract

The invention relates to a mesoporous silica nanosphere with an ultrahigh specific surface area and a preparation method of the mesoporous silica nanosphere. The preparation method of the mesoporous silica nanospheres with the ultrahigh specific surface area comprises the following steps: (1) dissolving tetraethoxysilane in an ethanol solution, and magnetically stirring and uniformly mixing to obtain a precursor solution A; and uniformly mixing ammonia water, water and a pore-forming agent to obtain a precursor solution B; (2) equivalently sucking the precursor solution A and the precursor solution B, placing the precursor solution A and the precursor solution B on a micro-injection pump, and quickly mixing the precursor solution A and the precursor solution B through a micro-channel reactor at the same injection speed to obtain a micro-emulsion; and (3) standing the micro-emulsion, carrying out water bath heating demulsification, carrying out suction filtration, drying, and carrying out high temperature calcination to obtain the mesoporous silica nanospheres. According to the preparation method disclosed by the invention, the mesoporous silica nanospheres with the specific surfacearea of about 700-1860m < 2 > / g can be rapidly and continuously prepared, the pelletizing effect is good, and the process time is short.

Description

technical field

[0001] The invention belongs to the technical field of inorganic nanometer materials, and in particular relates to a mesoporous silica nanosphere with an ultrahigh specific surface area and a preparation method thereof. Background technique

[0002] Silica nanosphere is an inorganic nanomaterial widely used at present. Due to its special surface effect, small size effect and macroscopic quantum tunneling, it has many unique physical and chemical properties, making it widely used. space. Due to the ultra-high specific surface area of ​​SiO 2 Nanospheres, with ultra-high specific surface area, rich pore volume and ordered mesopores, have a wider range of applications in the fields of catalysis, adsorption and pharmaceutical preparations.

[0003] The particle size and specific surface area of ​​silica nanospheres are the key factors affecting its performance. The larger the specific surface area, the higher the activity, the better the affinity and reinforcem...

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