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Preparation method for monodisperse porous silicon dioxide ball material

A porous silica, monodisperse technology, applied in the direction of silica, silicon oxide, nanotechnology for materials and surface science, etc., can solve the problems of small adjustable range of pore size, small pore size, etc., and achieve high repetition rate , the effect of simple operation

Active Publication Date: 2018-08-24
元颉新材料科技(浙江)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The present invention proposes a preparation method of a monodisperse porous silica sphere material, which solves the problems that the porous silica sphere material in the prior art has a small pore diameter and a small adjustable range of pore diameter

Method used

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  • Preparation method for monodisperse porous silicon dioxide ball material
  • Preparation method for monodisperse porous silicon dioxide ball material
  • Preparation method for monodisperse porous silicon dioxide ball material

Examples

Experimental program
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Effect test

Embodiment 1

[0035] A preparation method of a monodisperse porous silica sphere material, comprising:

[0036] (1) Dissolve 2.0g of cetyltrimethylammonium chloride and 0.08mL of triethanolamine in 20mL of deionized water successively, stir at high speed to form a colorless and transparent solution; put the colorless and transparent solution into the reactor Medium; the stirring speed of the above-mentioned high-speed stirring can be selected from 150-800 rpm, and the time can be controlled at 0.25-5h; the stirrer used can be a turbine stirrer, a paddle stirrer, a magnetic stirrer, a magnetic Heated, hinged-blade, or mechanical stirrers;

[0037] Dissolve ethyl orthosilicate in cyclohexane to obtain 8mL organic solution; wherein the concentration of ethyl orthosilicate is 10wt%; add the organic solution to the clear solution to form an oil-water miscible system;

[0038] (2) React the oil-water miscible system in step (1) in an oil bath at a temperature of 60° C. for 8 hours; after the rea...

Embodiment 2

[0042] (1) Dissolve 0.2g of cetyltrimethylammonium bromide and 0.08mL of octylamine in 20mL of deionized water successively, stir at high speed to form a colorless and transparent solution; put the colorless and transparent solution into the reactor Medium; the stirring speed of the above-mentioned high-speed stirring can be selected from 150-800 rpm, and the time can be controlled at 0.25-5h; the stirrer used can be a turbine stirrer, a paddle stirrer, a magnetic stirrer, a magnetic Heated, hinged-blade, or mechanical stirrers;

[0043] Dissolve ethyl orthosilicate in dioxane to obtain 10 mL of organic solution; wherein the concentration of ethyl orthosilicate is 3 wt %; add the organic solution to the clear solution to form an oil-water miscible system;

[0044] (2) React the oil-water miscible system in step (1) in an oil bath at a temperature of 40° C. for 24 hours; after the reaction, collect the precipitate by centrifugation, wash with water and ethanol three times respe...

Embodiment 3

[0048] (1) Dissolve 4.4g of octadecyltrimethylammonium bromide and 0.15mL of dodecylamine in 20mL of deionized water successively, stir at high speed to form a colorless and transparent solution; put the colorless and transparent solution into the reaction In the device; the stirring speed of the above-mentioned high-speed stirring can be selected from 150-800 rpm, and the time can be controlled at 0.25-5h; the stirrer used can be a turbine stirrer, a paddle stirrer, a magnetic stirrer, Magnetic heating stirrer, hinged leaf stirrer, or mechanical stirrer;

[0049] Dissolving fumed silica in octadecene to obtain 10 mL of an organic solution; wherein the concentration of fumed silica is 50 wt %; adding the organic solution to the clarified solution to form an oil-water miscible system;

[0050] (2) reacting the oil-water miscible system in step (1) in an oil bath at a temperature of 80° C. for 2 hours; after the reaction, the precipitate was collected by centrifugation, washed w...

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Abstract

The invention discloses a preparation method for a monodisperse porous silicon dioxide ball material. The preparation method comprises the following steps: (1) dissolving a surfactant and a catalyst into water, and stirring at a high speed to obtain a clear solution; dissolving a silicon source into an organic solvent to obtain an organic solution; adding the organic solution into the clear solution to form an oil-water mixed-phase system; (2) reacting the oil-water mixed-phase system in a temperature being 40-80 DEG C to obtain a monodisperse nanoball; and (3) removing the surfactant in the monodisperse nanoball to obtain the monodisperse porous silicon dioxide ball material. According to the preparation method disclosed by the invention, an oil-water two-phase mixing and dissolving reaction system is adopted, and the pore diameter of the inorganic silicon dioxide silicon ball is as high as 70 nm as a result of the chambering effect of the organic phase. Meanwhile, the pore diameter of the inorganic silicon dioxide silicon ball is controlled, so that the pore diameter can be freely controlled within 15-70 nm.

Description

technical field [0001] The invention relates to the technical field of nanomaterial preparation, in particular to a method for preparing a monodisperse porous silica sphere material. Background technique [0002] Porous silica spheres have the characteristics of high porosity, large specific surface area, stable chemical properties, low cost, good hydrophilicity, and non-toxicity. Therefore, they are widely used in the fields of adsorption, catalysis, filtration, and biomedicine. Due to the pore structure is the key to its application, so more and more attention has been paid to the research on regulating the pore size of porous silica. At present, there are many studies on the preparation of larger pore size silica materials, but most of them focus on the preparation of bulk materials. Therefore, it cannot be applied to the microscopic field. Due to the limitations of commercial surfactants, it is usually difficult to prepare silica spheres with larger pore sizes, and the ...

Claims

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Application Information

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IPC IPC(8): C01B33/18B82Y30/00B82Y40/00
CPCC01B33/18C01P2004/03C01P2004/04C01P2004/32C01P2004/62C01P2004/64C01P2006/12C01P2006/14C01P2006/16
Inventor 赵东元朱洪伟刘玉普
Owner 元颉新材料科技(浙江)有限公司
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