Mesoporous silicon dioxide nanoparticle with small particle size and large pore diameter and preparation method thereof

A mesoporous silica and nanoparticle technology, applied in the directions of silica, silicon oxide, nanotechnology, etc., can solve the problems of difficulty in ensuring the shape, uneven shape, large particle size of silica, etc. Uniform size, large pore size and small particle size

Active Publication Date: 2018-11-23
NANJING UNIV OF POSTS & TELECOMM
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the silicon dioxide obtained by the hydrothermal method in the prior art generally has the defects of large particle size, uneven appearance, and serious crosslinking phenomenon.
However, using other methods, such as changing the chain length of the template agent, changing the composition of the surfactant, or adjusting the reaction pH, to expand the pores of small-sized mesoporous materials, it is difficult to ensure its original small and uniform morphology.

Method used

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  • Mesoporous silicon dioxide nanoparticle with small particle size and large pore diameter and preparation method thereof
  • Mesoporous silicon dioxide nanoparticle with small particle size and large pore diameter and preparation method thereof
  • Mesoporous silicon dioxide nanoparticle with small particle size and large pore diameter and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0031] Mix 16mL ultrapure water, 2.8mL ethanol, 0.05g diethanolamine and 2.6mL 25wt% CTAC aqueous solution, add 1.3mL TMB, stir and react at 60°C for 6h; then add 1.75mLTEOS, continue stirring for 3h, and then add 1.2 mL DMDMS continued to react for 20h; after the reaction was completed, centrifuge and wash 3 times with a mixture of ethanol and water; dispersed in a mixture of hydrochloric acid and ethanol (7.5mL concentrated hydrochloric acid and 60mL ethanol), stirred and reacted at 60°C for 24h; finally , centrifuged and washed 3 times with a mixture of ethanol and water, and dispersed in ultrapure water to freeze-dry to obtain mesoporous silica nanoparticles with small particle size and large pore size. The TEM image of the sample is as follows figure 1 As shown, it can be seen from the figure that the particles have good dispersion, uniform size, the smallest particle size is about 50nm, and a pore structure.

Embodiment 2

[0033] Mix 16mL ultrapure water, 2.8mL ethanol, 0.05g diethanolamine and 2.6mL 25wt% CTAC aqueous solution, add 2.6mL TMB, stir and react at 60°C for 6h; then add 1.75mL TEOS, continue stirring for 3h, then add 1.2mL DMDMS continued to react for 20h; after the reaction was completed, centrifuge and wash 3 times with a mixture of ethanol and water; dispersed in a mixture of hydrochloric acid and ethanol (7.5mL concentrated hydrochloric acid and 60mL ethanol), stirred and reacted at 60°C for 24h; finally , centrifuged and washed 3 times with a mixture of ethanol and water, dispersed in ultrapure water and freeze-dried to obtain mesoporous silica nanoparticles with small particle size and large pore size.

[0034] The TEM image of the sample is shown in figure 2 As shown, it can be seen from the figure that the particles have good dispersion, uniform size, and a pore structure.

[0035] The nitrogen adsorption-desorption curve of the sample is as follows: image 3 As shown, it...

Embodiment 3

[0039] Mix 16mL ultrapure water, 2.8mL ethanol, 0.05g diethanolamine and 2.6mL 25wt% CTAC aqueous solution, add 2.6mL TMB, stir and react at 60°C for 8h; then add 1.75mL TEOS, continue stirring for 3h, then add 1.2mL DMDMS continued to react for 20h; after the reaction was completed, centrifuge and wash 3 times with a mixture of ethanol and water; dispersed in a mixture of hydrochloric acid and ethanol (7.5mL concentrated hydrochloric acid and 60mL ethanol), stirred and reacted at 60°C for 24h; Finally, the mixture of ethanol and water was centrifuged and washed 3 times, and dispersed in ultrapure water to freeze-dry to obtain mesoporous silica nanoparticles with small particle size and large pore size. The TEM image of the sample is as follows: Image 6 As shown, it can be seen that the particles have good dispersion, uniform size, particle diameter less than 50nm, and a pore structure.

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Abstract

The invention discloses a mesoporous silicon dioxide nanoparticle with small particle size and large pore diameter and a preparation method thereof. The preparation method comprises the following steps of using a surfactant CATC (aetyl trimethylammonium chloride) and a TMB (1,3,5-trimethylbenzene) co-solvent as templates, using TEOS (tetraethoxysilane) and DMDMS (dimethyl diethoxysilane) as silicon sources, and reacting by a one-step method under certain conditions, so as to obtain the mesoporous silicon dioxide nanoparticle. The prepared mesoporous silicon dioxide nanoparticle has the advantages that the particle size is smaller, the pore diameter is larger, the size is uniform, the specific surface area is large, and the like; the important application prospect is realized in the fieldsof biomedicine, chemical engineering, functional materials and the like.

Description

technical field [0001] The invention belongs to the technical field of nanomaterial preparation, and in particular relates to a mesoporous silicon dioxide nanoparticle with a small particle diameter and a large aperture and a preparation method thereof. Background technique [0002] In recent years, with the development of nanoscience and technology, mesoporous materials have received widespread attention. Mesoporous materials refer to a class of porous materials with a pore diameter between 2-50nm. Mesoporous materials have the advantages of high specific surface area, regular and ordered pore structure, adjustable pore diameter, and easy chemical modification of the surface. Therefore, mesoporous materials It is more conducive to the diffusion and transportation of the medium in the channel, and it shows broad application prospects in the fields of adsorption and separation of macromolecules or ions, chemical catalysis, biosensors, and biomedicine. [0003] In order to ex...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B33/18B82Y40/00
CPCB82Y40/00C01B33/18C01P2004/03C01P2004/04C01P2004/64C01P2006/12C01P2006/16
Inventor 刘湘梅张京徽韩艺蕃赵强刘淑娟黄维
Owner NANJING UNIV OF POSTS & TELECOMM
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