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Preparation method of monodisperse hollow mesoporous silica nanoparticle

A technology of mesoporous silica and nano-microspheres, applied in the direction of silica, silicon oxide, chemical instruments and methods, etc., can solve the problems of hollow mesoporous silica with rough surface, poor sphericity, and uneven scale , to achieve the effect of high sphericity, uniform scale and low cost

Active Publication Date: 2016-09-07
HARBIN INST OF TECH
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  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to provide a method for preparing monodisperse hollow mesoporous silica nanospheres in order to solve the technical problems of rough surface, poor sphericity and non-uniform scale of the hollow mesoporous silica prepared by the existing method

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  • Preparation method of monodisperse hollow mesoporous silica nanoparticle
  • Preparation method of monodisperse hollow mesoporous silica nanoparticle
  • Preparation method of monodisperse hollow mesoporous silica nanoparticle

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specific Embodiment approach 1

[0017] Embodiment 1: The preparation method of monodisperse hollow mesoporous silica nano-microspheres in this embodiment is carried out according to the following steps:

[0018] 1. Dissolve cetyltrimethylammonium bromide in ethanol aqueous solution, the ratio of cetyltrimethylammonium bromide to ethanol aqueous solution is 0.05-0.09g: 48mL, ethanol and ethanol in ethanol aqueous solution The volume ratio of water is 1:2, add polystyrene microspheres with a particle size of 200nm-700nm, the mass ratio of polystyrene microspheres to cetyltrimethylammonium bromide is 3:7, and then add ammonia water , the ratio of ammonia water to cetyltrimethylammonium bromide is 70-100mL: 7g, after stirring for 30min, add tetraethyl orthosilicate dropwise, the volume ratio of tetraethyl orthosilicate and ammonia water is 0.5-1.5: 8.5 , stirred and reacted for 18 hours, centrifuged, then washed 3 times with deionized water, washed 3 times with ethanol, and centrifuged;

[0019] 2. Dry the prec...

specific Embodiment approach 2

[0020] Embodiment 2: This embodiment differs from Embodiment 1 in that the concentration of ammonia water in step 1 is 25%-28%. Others are the same as in the first embodiment.

specific Embodiment approach 3

[0021] Embodiment 3: This embodiment differs from Embodiment 1 or Embodiment 2 in that the ratio of cetyltrimethylammonium bromide to ethanol in step 1 is 0.07g:48mL. Others are the same as those in the first or second embodiment.

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Abstract

The invention provides a preparation method of monodisperse hollow mesoporous silica nanoparticle, and relates to a preparation method of nanoparticle. The invention overcomes the technical problem that the hollow mesoporous silica prepared by the prior art has rough surface, bad sphericity, and inhomogenous dimension. The method includes: dissolving cetyl trimethyl ammonium bromide into ethanol aqueous solution, adding polystyrene microsphere, adding ammonia water, adding dropwise ethyl orthosilicate, performing centrifugation, drying the precipitate, moving the precipitate into a muffle furnace, and calcining the precipitate to obtain the product. The invention provides the preparation method of hollow mesoporous silica nanoparticle having homogeneous dimension, good sphericity, and controllable particle size. Moreover, the method has simple process and low cost, and can improve the application range of the hollow silica greatly. The invention belongs to the field of preparation of silica nanoparticle.

Description

technical field [0001] The invention relates to a preparation method of nano microspheres. Background technique [0002] Due to its large specific surface area, non-toxicity, high temperature resistance, and good stability, hollow mesoporous silica has been widely used in the fields of catalysis, adsorption separation, drug delivery, energy, biomedical materials, and refractory materials. [0003] There are many conventional methods for preparing silica with a hollow structure, such as template method, emulsion method and spray method. Although the emulsion method can prepare hollow silica with a large particle size of about 5 μm, this method requires strict control of reaction conditions, such as reaction time, reaction pH and stirring speed. The spray method requires complex instruments and complicated operations. The template rule is simple to operate, and it is easy to regulate the particle size of the hollow-structured silica through the particle size of the template....

Claims

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Application Information

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IPC IPC(8): C01B33/18
CPCC01B33/186C01P2004/03C01P2004/04C01P2004/34
Inventor 李垚熊成佳徐洪波赵九蓬耿洪滨
Owner HARBIN INST OF TECH
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