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Preparation method for mesoporous silica material

A technology of mesoporous silica and nanomaterials, applied in the direction of silica, silicon oxide, nanotechnology for materials and surface science, etc., can solve problems such as limitations, achieve regular shape, mild operating conditions, and particle size even diameter effect

Inactive Publication Date: 2015-07-22
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although it is convenient to use a single template, the single template is limited in the synthesis of some mesoporous silica with special morphology and pore structure.

Method used

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  • Preparation method for mesoporous silica material
  • Preparation method for mesoporous silica material
  • Preparation method for mesoporous silica material

Examples

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Effect test

Embodiment 1

[0038] A method for preparing a mesoporous silicon dioxide nanomaterial, comprising the steps of:

[0039] (1) At room temperature, according to the total surfactant concentration of 0.028mol / L, weigh 0.5715g of cetyltrimethylammonium bromide and 0.1366g of sodium dodecylbenzenesulfonate into 70mL of deionized water, 50Hz Ultrasound at high power for 20 minutes to obtain a clear solution, and then let it stand for 24 hours;

[0040] (2) At room temperature, add 0.8mL of ammonia solution with a mass fraction of 25% to 28% to the clear solution obtained in step (1), then add 5mL of ethanol solution and 20mL of ether solution in turn, stir vigorously for 30min; then quickly add 2.5g tetraethyl orthosilicate solution, vigorously stirred for 4 hours, and a solid precipitate was formed;

[0041] (3) Suction filter the solid precipitate obtained in step (2), wash it with water and ethanol three times respectively, and then place it in a drying oven at 60-80°C for more than 24 hours;...

Embodiment 2

[0044] A method for preparing a mesoporous silicon dioxide nanomaterial, comprising the steps of:

[0045] (1) At room temperature, according to the total surfactant concentration of 0.028mol / L, weigh 0.5715g of cetyltrimethylammonium bromide and 0.1366g of sodium dodecylbenzenesulfonate into 70mL of deionized water, 50Hz Ultrasound at high power for 20 minutes to obtain a clear solution, and then let it stand for 24 hours;

[0046] (2) At room temperature, add 0.8mL of ammonia solution with a mass fraction of 25% to 28% to the clear solution obtained in step (1), then add 10mL of ethanol solution and 20mL of ether solution in turn, stir vigorously for 30min; then quickly add 2.5g tetraethyl orthosilicate solution, vigorously stirred for 4 hours, and a solid precipitate was formed;

[0047] (3) Suction filter the solid precipitate obtained in step (2), wash with water and ethanol three times respectively, and then place it in a drying oven at 60-80° C. for drying for more tha...

Embodiment 3

[0050] A method for preparing a mesoporous silicon dioxide nanomaterial, comprising the steps of:

[0051] (1) At room temperature, according to the total surfactant concentration of 0.028mol / L, weigh 0.5715g of cetyltrimethylammonium bromide and 0.1366g of sodium dodecylbenzenesulfonate into 70mL of deionized water, 50Hz Ultrasound at high power for 20 minutes to obtain a clear solution, and then let it stand for 24 hours;

[0052] (2) At room temperature, add 0.8mL of ammonia solution with a mass fraction of 25% to 28% to the clear solution obtained in step (1), then add 15mL of ethanol solution and 20mL of ether solution in turn, stir vigorously for 30min; then quickly add 2.5g tetraethyl orthosilicate solution, vigorously stirred for 4 hours, and a solid precipitate was formed;

[0053] (3) Suction filter the solid precipitate obtained in step (2), wash with water and ethanol three times respectively, and then place it in a drying oven at 60-80° C. for drying for more tha...

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Abstract

The invention belongs to the technical field of mesoporous nanomaterial preparation, and discloses a preparation method for a size-controllable mesoporous silica material. According to the preparation method, micelles formed by two surfactants of hexadecyl trimethyl ammonium bromide and sodium dodecyl benzene sulfonate are taken as templates, ethyl orthosilicate is taken as a silicon source, ethanol and ether are taken as co-solvents, under an ammonia water-water system, the size-controllable mesoporous silica material is synthesized, and finally, the templates are removed by baking. The preparation method is simple to operate and mild in condition; the morphology and the specific surface area are controlled by adjusting the concentration and proportion of the surfactants and the ratio of the two co-solvents, and the prepared silica nanomaterial is regular in morphology, uniform in particle size and stable in structure; the prepared silica nanomaterial having different morphologies and pore sizes can be widely applied to adsorption, catalysis, carriers, drug slow release and other fields.

Description

technical field [0001] The invention belongs to the technical field of preparation of mesoporous nanomaterials, and in particular relates to a preparation method of a size-controllable mesoporous silicon dioxide material. Background technique [0002] In recent years, mesoporous silica nanomaterials with rich morphology and structure have attracted great attention because they have many excellent properties, such as low density, low toxicity, large specific surface area, strong permeability, good biocompatibility, High mechanical stability, easy functionalization, and easy loading, so it is widely used in the fields of gas molecule separation, nanoreactor, drug sustained release, etc. In 1992, Kresge et al. reported for the first time that MCM-41 silica-like ordered mesoporous molecular sieve materials were synthesized by using methane quaternary ammonium salt cation as a template, which aroused an upsurge of research on ordered mesoporous materials. Subsequently, D.Y.Zhao ...

Claims

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Application Information

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IPC IPC(8): C01B33/12B82Y30/00B82Y40/00
Inventor 奚红霞孙惠惠朱智洪郑丽明
Owner SOUTH CHINA UNIV OF TECH
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