Unlock instant, AI-driven research and patent intelligence for your innovation.

Hollow mesoporous silicon dioxide nano particles and method for preparing same

A technology of mesoporous silica and nanoparticles, applied in the field of mesoporous materials, can solve problems such as large hollow volume, and achieve the effect of uniform reaction and simple process

Active Publication Date: 2013-10-30
天津渤化讯创科技有限公司
View PDF3 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of this research is to provide a method for preparing hollow mesoporous silica nanoparticles, focusing on solving the problem of mesoporous silica nanoparticles with larger hollow volume

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Hollow mesoporous silicon dioxide nano particles and method for preparing same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Step 1, dissolving 0.2 parts of cetyltrimethylammonium bromide (CTAB) in 300 parts of water, heating and mixing to obtain a clear solution;

[0024] Step 2, 130 parts of ethanol, 18 parts of tetraethyl orthosilicate (TEOS), 5 parts of n-hexadecane, 60 parts of N 2 h 4 Added to the system of step 1; under the protection of argon, the reaction was carried out at 60°C for 2h;

[0025] In step 3, the heating of the reaction system in step 2 is stopped, and the suspension is cooled naturally for 12 hours to room temperature; the suspension is centrifuged twice at a speed of 15,000 rpm to purify the particles to obtain hollow mesoporous silica nanoparticles.

[0026] The hollow structure of the prepared mesoporous silica nanoparticles is clear and obvious, the pore diameter is about 4nm, the outer diameter is about 50nm, and the hollow volume is about 70%.

Embodiment 2

[0028] Step 1, dissolving 1.1 parts of cetyltrimethylammonium bromide (CTAB) in 300 parts of water, heating and mixing to obtain a clear solution;

[0029] Step 2, with 250 parts of ethanol, 0.1 part of silicon tetrachloride, 20 parts of n-hexadecane, 100 parts of N 2 h 4 Added to the system of step 1; under the protection of argon, the reaction was carried out at 60°C for 3h;

[0030] In step 3, the heating of the reaction system in step 2 is stopped, and the suspension is cooled naturally for 12 hours to room temperature; the suspension is centrifuged twice at a speed of 15,000 rpm to purify the particles to obtain hollow mesoporous silica nanoparticles.

[0031] The hollow structure of the prepared mesoporous silica nanoparticles is clear and obvious, the pore diameter is about 4nm, the outer diameter is about 100nm, and the hollow volume is about 80%. figure 1 shown.

Embodiment 3

[0033] Step 1, dissolving 2 parts of cetyltrimethylammonium bromide (CTAB) in 300 parts of water, heating and mixing to obtain a clear solution;

[0034] Step 2, with 10 parts of acetone, 9 parts of silicon tetrachloride, 35 parts of n-hexadecane, 10 parts of ammonia and 10 parts of N 2 h 4 Added to the system of step 1; under the protection of argon, the reaction was carried out at 60°C for 3h;

[0035] In step 3, the heating of the reaction system in step 2 is stopped, and the suspension is cooled naturally for 12 hours to room temperature; the suspension is centrifuged twice at a speed of 15,000 rpm to purify the particles to obtain hollow mesoporous silica nanoparticles.

[0036] The hollow structure of the prepared mesoporous silica nanoparticles is clear and obvious, the pore diameter is about 4nm, the outer diameter is about 150nm, and the hollow volume is about 90%.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
pore sizeaaaaaaaaaa
particle diameteraaaaaaaaaa
pore sizeaaaaaaaaaa
Login to View More

Abstract

The invention relates to hollow mesoporous silicon dioxide nano particles and a method for preparing the same. The method includes 1) dissolving from 0.2 to 2 parts of surfactant into 300 parts of deionized water, and heating and mixing the surfactant and the deionized water to obtain clear liquor; 2) sequentially adding from 10 to 250 parts of oil-phase components, from 0.1 to 18 parts of silicon sources, from 5 to 35 parts of organic alkane and from 20 to 100 parts of catalysts into a system of the step 1), enabling the mixture to react at the temperature ranging from 60 DEG C to 80 DEG C for 2 to 4 hours under protection of argon; and 3) stopping heating for a reaction system of the step 2), cooling the reaction system to room temperature and centrifugally washing the reaction system to obtain the hollow mesoporous silicon dioxide nano particles. The average particle size of the hollow mesoporous silicon dioxide nano particle ranges from 4nm to 8nm, the outer diameter of each hollow mesoporous silicon dioxide nano particle ranges from 50nm to 150nm, and each hollow mesoporous silicon dioxide nano particle has an obvious hollow structure. The hollow mesoporous silicon dioxide nano particles and the method for preparing the same have the advantages that a preparation process is simple, reaction is uniform, and complicated separation and purification processes are omitted.

Description

technical field [0001] The invention relates to a mesoporous material applicable to the field of biomedicine, in particular to a method for preparing mesoporous silica nanoparticles with larger hollow volumes. Background technique [0002] In recent years, the rapid development of mesoporous materials has attracted the attention of more and more researchers. Mesoporous material is a new type of material with a pore size between micropores and macropores, which has a huge surface area and a three-dimensional pore structure. It has excellent characteristics that other porous materials do not have: highly ordered pore structure; single distribution of pore size, and the pore size can be varied in a wide range; various mesopore shapes, pore wall composition and properties can be adjusted; by optimizing the synthesis conditions High thermal stability and chemical stability can be obtained. The research and development of mesoporous materials are of great significance to both th...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): C01B33/18B82Y40/00
Inventor 常津窦妍刘俊庆
Owner 天津渤化讯创科技有限公司