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Monodisperse mesoporous silica nano-particle with controllable appearance and synthesis method thereof

A technology of mesoporous silica and nanoparticles, which is applied in the direction of silica, silicon oxide, nanotechnology, etc., can solve the difficulties of synthesizing mesoporous silica, and the synthesis of mesoporous silica has not been reported. Achieve excellent adsorption and separation performance, wide application, and convenient operation

Inactive Publication Date: 2010-05-12
NANKAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, the synthesis of mesoporous silica under neutral conditions has not been reported so far.
The reason may be that under neutral conditions, it is difficult to synthesize mesoporous silica

Method used

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  • Monodisperse mesoporous silica nano-particle with controllable appearance and synthesis method thereof
  • Monodisperse mesoporous silica nano-particle with controllable appearance and synthesis method thereof
  • Monodisperse mesoporous silica nano-particle with controllable appearance and synthesis method thereof

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Experimental program
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Effect test

Embodiment 1

[0047] At room temperature, 5.68g of sodium silicate (Na 2 SiO 3 9H 2 O) Dissolve in 25ml deionized water. In another reaction flask, 3.494g of cetyltrimethylammonium bromide was dissolved in 35ml of deionized water, and 16ml of 2.4M hydrochloric acid was added. Under rapid stirring, quickly add the above sodium silicate solution into the mixed solution containing surfactant and acid (the molar ratio of silicon source to surfactant is 1:0.48), at this time the solution is neutral, and a large amount of precipitates are formed immediately . Stirring was continued for 2 hours. Add 6ml of concentrated ammonia water (28% by mass fraction), and stir for another 2.5 hours. The solid product was collected by filtration and washed with deionized water. After drying, it was calcined at 550° C. for 6 hours to obtain the final product.

Embodiment 2

[0049] At room temperature, 5.68g of sodium silicate (Na 2 SiO 3 9H 2 O) Dissolve in 25ml deionized water. In another reaction flask, 1.747g of cetyltrimethylammonium bromide was dissolved in 35ml of deionized water, and 16ml of 2.4M hydrochloric acid was added. Under rapid stirring, the above-mentioned sodium silicate solution was quickly added to the mixed solution containing surfactant and acid (the molar ratio of silicon source to surfactant was 1:0.24), and a large amount of precipitation was formed immediately. Stirring was continued for 2 hours. Add 6ml of concentrated ammonia water (28% by mass fraction), and stir for another 2.5 hours. The solid product was collected by filtration and washed with deionized water. After drying, it was calcined at 550° C. for 6 hours to obtain the final product.

Embodiment 3

[0051] At room temperature, 5.68g of sodium silicate (Na 2 SiO 3 9H 2 O) Dissolve in 25ml deionized water. In another reaction flask, 3.070 g of cetyltrimethylammonium chloride was dissolved in 35 ml of deionized water, and 16 ml of 2.4M hydrochloric acid was added. Under rapid stirring, the above-mentioned sodium silicate solution was quickly added to the mixed solution containing surfactant and acid (the molar ratio of silicon source to surfactant was 1:0.48), and a large amount of precipitation was formed immediately. Stirring was continued for 2 hours. Add 6ml of concentrated ammonia water (28% by mass fraction), and stir for another 2.5 hours. The solid product was collected by filtration and washed with deionized water. After drying, it was calcined at 550° C. for 6 hours to obtain the final product.

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Abstract

The invention relates to a monodisperse mesoporous silica nano-particle with controllable appearance and a preparation method thereof. Under a neutral condition, mesoporous silica nano-particle with required appearance and single dimension distribution can be directly synthesized by taking sodium silicate as a silicon source and taking a cation surfactant as a template agent. The mesoporous silica nano-particle has short cylindrical appearance with open hole channels arranged at two ends; the hole channel structure is an orderly two-dimensional hexagonal phase; the diameter of the hole channel is 1-4 nanometers; the volume of the hole is 0.5-0.8 cm<3> / g; and the specific surface area of the hole is 800-1200 m<2> / g. The mesoporous silica nano-particle can be used as separation and adsorption of the polypeptide medicine molecular and the nano-reactor of the catalytic reaction, and the like. The preparation method has quick synthesis speed and high yield, and is especially suitable for producing the mesoporous silica nano-particles of the type in large scale.

Description

technical field [0001] The invention relates to a shape-controllable monodisperse mesoporous silicon dioxide nanoparticle and a synthesis method thereof. More specifically, it relates to a columnar monodisperse mesoporous silica nanoparticle with open channels at both ends. The mesoporous silicon dioxide nanoparticles have excellent separation and adsorption properties, and can be used for the separation and adsorption of polypeptide drug molecules and as nanoreactors for catalytic reactions. In addition, the present invention also relates to a method for rapidly assembling mesoporous silica nanoparticles by controlling the reaction to proceed under neutral conditions. Background technique [0002] Mesoporous silica material has a large nanoscale pore size, and is suitable for use as a catalyst carrier for larger molecular reactions, as well as for the separation and adsorption of larger molecules. In particular, "nanoscale" particles of mesoporous silica (hereinafter refe...

Claims

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Application Information

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IPC IPC(8): C01B33/12B82B3/00
Inventor 孙怀林逯擎朱门于蕾崔崑
Owner NANKAI UNIV
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