Preparation of mesoporous hollow SiO2 nano-material

A technology of mesoporous silica and silica, applied in the direction of silica, silica, nanotechnology, etc., can solve the problems of excessive particle size, short reaction time, application limitations, etc., and achieve small particle size and cost. Low, low density effects

Active Publication Date: 2017-10-24
NANJING UNIV OF POSTS & TELECOMM
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the microspheres obtained by the spray method are micron-sized, and their application may be limited due to their large particle size.
The biggest advantage of the ultrasonic method is that the reaction can be carried out at room temperature and the reaction time is short, but this method requires strict control of ultrasonic power and ultrasonic time

Method used

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  • Preparation of mesoporous hollow SiO2 nano-material
  • Preparation of mesoporous hollow SiO2 nano-material
  • Preparation of mesoporous hollow SiO2 nano-material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] (1) Using CTAC as a surfactant template to synthesize mesoporous silica nanomaterials

[0029] The molar ratio of water, ethanol, diethanolamine and cetyltrimethylammonium chloride CTAC aqueous solution, tetraethoxysilane TEOS, mercaptopropyltrimethoxysilane is 3.6:200:2:8:31:3.2 First, the first four materials were mixed, and the reaction was stirred at 60°C for 0.5h. Then the latter two materials were added and the reaction was continued for 3h. The SEM ( figure 1 a) and TEM image ( figure 1 b) such as figure 1 As shown, it can be seen from the figure that the particle size is uniform, the dispersibility is good, and the particle size is about 40-70nm.

[0030] (2) Using CTAC as a surfactant template and expanding the mother liquor to synthesize mesoporous hollow silica nanomaterials

[0031] Take out 5 mL of the above-prepared solution and 10 mL of TMB and place them in a 25 mL reaction kettle, mix well, and hydrothermally react at 120° C. for 1 day, and then centrifuge and...

Embodiment 2

[0033] (1) Using CTAC as a surfactant template to synthesize mesoporous silica nanomaterials

[0034] The molar ratio of water, ethanol, diethanolamine and cetyltrimethylammonium chloride CTAC aqueous solution, tetraethoxysilane TEOS, mercaptopropyltrimethoxysilane is 3.6:200:2:8:31:3.2 First, the first four materials were mixed, and the reaction was stirred at 60°C for 0.5h, and then the latter two materials were added and the reaction was continued for 3h.

[0035] (2) Using CTAC as a surfactant template and expanding the mother liquor to synthesize mesoporous hollow silica nanomaterials

[0036] Take out 5 mL of the above-prepared solution and 15 mL of TMB and place them in a 25 mL reaction kettle, mix well, hydrothermally react at 150° C. for 2 days, and then centrifuge and wash with ethanol three times. The TEM image obtained by the test is as follows image 3 As shown, it can be seen that most of the nanoparticles are hollow.

Embodiment 3

[0038] (1) Using CTAC as a surfactant template to synthesize mesoporous silica nanomaterials

[0039] The molar ratio of water, ethanol, diethanolamine and cetyltrimethylammonium chloride CTAC aqueous solution, tetraethoxysilane TEOS, mercaptopropyltrimethoxysilane is 3.6:200:2:8:31:3.2 First, the first four materials were mixed, and the reaction was stirred at 60°C for 0.5h, and then the latter two materials were added and the reaction was continued for 3h.

[0040] (2) Using CTAC as a surfactant template and expanding the mother liquor to synthesize mesoporous hollow silica nanomaterials

[0041] Take out 5 mL of the above-prepared solution and 5 mL of TMB and place them in a 25 mL reaction kettle, mix well, and react hydrothermally at 130°C for 3 days, and then centrifuge and wash with ethanol three times. The TEM image obtained by the test is as follows Figure 4 As shown, it can be seen that the nanoparticles are basically hollow.

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Abstract

The invention belongs to the technical of nano material preparation and particularly relates to preparation of a mesoporous hollow SiO2 nano-material. The preparation method includes the steps of: 1) with a surfactant as a template and tetraethoxysilane as a silicon source, preparing a mesoporous SiO2 nano-particle suspension liquid in an alkaline environment through a sol-gel method; 2) directly adding a certain amount of 1,3,5-trimethylbenzene (TMB) to the suspension liquid according to ratio; 3) performing a hydrothermal pore-broadening reaction at certain temperature for a certain time to finally produce the mesoporous hollow SiO2 nano-particles. The mesoporous hollow SiO2 nano-particles have small and uniform size, have high specific surface area, low density, good stability, high load capacity and good biocompatibility. The preparation method is simple in process and low in cost and has wide application range. The nano-material has significant application prospect in the fields of biomedicines, chemical industry, functional materials, etc.

Description

Technical field [0001] The invention belongs to the field of nano material preparation technology and special material technology, and specifically relates to a preparation method of a type of mesoporous hollow silica nano material. Background technique [0002] With the continuous progress and development of nanomaterials technology, various nanomaterials with special structures and properties have become the research hotspot of global nanotechnology. This is because changes in the size, composition and shape of the material will give the material unique physical and chemical properties. Therefore, the development of nano-functional materials with controllable structure and excellent performance has become one of the primary tasks in the field of materials science. [0003] Hollow structure silica nanomaterials are a large class of important nanostructure materials, and they are a new system constructed by nanomaterials. This material has unique properties such as large specific ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B33/18B82Y40/00
CPCB82Y40/00C01B33/18C01P2004/03C01P2004/04C01P2004/34C01P2004/51C01P2004/62C01P2004/64
Inventor 刘湘梅田康韩艺蕃孙宁欣赵强黄维刘淑娟
Owner NANJING UNIV OF POSTS & TELECOMM
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