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Ordered meso-porous silicon oxide and rapid preparation method thereof

A mesoporous silicon oxide, fast technology, applied in the directions of silicon oxide, silicon dioxide, etc., can solve the problems of the preparation operation of propagating materials, increase the preparation cost, etc., and achieve a fast and simple preparation method, good removal ability, and hydrothermal stability. Good results

Inactive Publication Date: 2007-12-05
NANJING UNIV OF SCI & TECH
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Problems solved by technology

However, the problem with this method is that the drying process needs to use a vacuum environment to remove the TMOS hydrolyzate methanol, and needs to add a pore-enlarging agent, which complicates the preparation of the material and increases the preparation cost.

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  • Ordered meso-porous silicon oxide and rapid preparation method thereof

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Embodiment Construction

[0017] The rapid preparation method of the ordered mesoporous silica of the present invention adopts the direct template method, with the high-concentration solution of the tri-block copolymer P123 as the template, and tetraethyl orthosilicate (TEOS) as the silicon source. quickly in the system. The final material molar ratio is TEOS:P123:HCl=1:0.0367:0.0038. The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0018] In actual operation, the required amount of mesoporous silica can be prepared by fixing the ratio of materials and changing the amount of reactants. Taking the preparation of a 7.9g sample as an example, the specific operation steps are:

[0019] (1) Accurately weigh 14g of P123 into a three-necked flask, add 30mLTEOS, and stir in a 60°C water bath until completely dissolved;

[0020] (2) Add 10mL of 0.05mol / L hydrochloric acid solution rapidly to the reaction solution, stir rapidly to form a thick pa...

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Abstract

The present invention discloses ordered mesoporous silica and its fast preparation process in an acid system with high concentration solution of three block copolymer P123 as the template agent and ethyl silicate (TEOS) as silicon source. The ordered mesoporous silica has the features of high degree of order, complete spatial group structure, great pore size, thick pore wall and high hydrothermal stability. Its preparation process is simple, fast, easy in operation, environment friendly and low in cost. It may be post-treated properly to prepare excellent adsorbent as one kind of environment protecting material or inorganic separating film with high flux, high selectivity and broad application range.

Description

a technical field [0001] The invention belongs to the field of ordered mesoporous materials, and in particular relates to an ordered mesoporous silicon oxide with a large-aperture three-dimensional bicontinuous pore structure and a rapid preparation method thereof. Two background technology [0002] Ordered mesoporous materials have the advantages of high specific surface area, narrow pore size distribution, continuously adjustable pore size within a certain range, and easy surface modification. It has great application potential in the fields of separation and catalysis. With the deepening of research on mesoporous materials, different types of mesoporous materials have been reported one after another, among which the space group is The ordered mesoporous silica has a helical double continuous cubic structure. This structure is characterized by two sets of three-dimensional channels that are identical but not connected to each other. They have high symmetry and good conne...

Claims

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Application Information

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IPC IPC(8): C01B33/18
Inventor 李健生王连军郝艳霞苗小郁孙秀云刘晓东
Owner NANJING UNIV OF SCI & TECH
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