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Preparation method of mesoporous silica-carbon composite material

A technology of mesoporous silica and carbon composite materials, applied in the direction of preparation/purification of silica and carbon, silicon oxide, etc., can solve the problems of complex steps and high cost, and achieve high repetition rate, low cost and simple operation Effect

Inactive Publication Date: 2019-04-26
深圳元颉新材料科技有限公司
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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 mesoporous silica-carbon composite material, which solves the problems of complicated steps and high cost of preparing mesoporous silica-carbon composite material in the prior art

Method used

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  • Preparation method of mesoporous silica-carbon composite material
  • Preparation method of mesoporous silica-carbon composite material
  • Preparation method of mesoporous silica-carbon composite material

Examples

Experimental program
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Effect test

Embodiment 1

[0026] A method for preparing a mesoporous silica-carbon composite material, comprising:

[0027] (1) Dilute the concentrated sulfuric acid into water to prepare a dilute sulfuric acid solution with a concentration of 1.0wt%;

[0028] Disperse 0.2g of mesoporous silica-hexadecyltrimethylammonium bromide composite material into 4mL of dilute sulfuric acid solution, and ultrasonically disperse to form a uniform solution;

[0029] (2) Dry the mixed system in step (1) at a temperature of 100°C for 6 hours to obtain a mesoporous silica-hexadecyltrimethylammonium bromide-sulfuric acid composite material; after drying , transferred to a 160°C oven for pre-carbonization to obtain a mesoporous silica-low polycarbon composite material;

[0030] (3) Put the above-mentioned mesoporous silica-low polycarbon composite material in a tube furnace, raise the temperature from room temperature to 600° C. under an inert gas atmosphere, and keep it for 6 hours, with a heating rate of 1° C. / min. ...

Embodiment 2

[0033] (1) the concentrated sulfuric acid is diluted in water, and preparation concentration is the dilute sulfuric acid solution of 2.5wt%;

[0034] Disperse 0.04g of mesoporous silica-octadecyltrimethylammonium chloride composite material into 4mL of dilute sulfuric acid solution, and ultrasonically disperse to form a uniform solution;

[0035] (2) Dry the mixed system in step (1) at a temperature of 60°C for 6 hours to obtain a mesoporous silica-octadecyltrimethylammonium chloride-sulfuric acid composite material; after drying , transferred to a 150°C oven for pre-carbonization to obtain a mesoporous silica-low polycarbon composite material;

[0036] (3) Put the above-mentioned mesoporous silica-low polycarbon composite material in a tube furnace, raise the temperature from room temperature to 800°C under an inert gas atmosphere, and keep it for 4h, with a heating rate of 5°C / min, A mesoporous silica-carbon composite was obtained.

[0037] The mesoporous silicon dioxide-l...

Embodiment 3

[0039] (1) dilute the concentrated sulfuric acid into water, prepare the dilute sulfuric acid solution that concentration is 5.0wt%;

[0040] Disperse 0.004g of mesoporous silica-F127 composite material into 4mL of dilute sulfuric acid solution, and ultrasonically disperse to form a uniform solution;

[0041] (2) Dry the mixed system in step (1) at a temperature of 80°C for 10 hours to obtain a mesoporous silica-F127-sulfuric acid composite material; after drying, transfer it to an oven at 180°C for pre-carbonization , to obtain mesoporous silica-low polycarbon composite material;

[0042] (3) Put the above-mentioned mesoporous silica-low polycarbon composite material in a tube furnace, raise the temperature from room temperature to 900°C under an inert gas atmosphere, and keep it for 3h, the heating rate is 10°C / min, A mesoporous silica-carbon composite was obtained.

[0043] The mesoporous silicon dioxide-low polycarbon composite material obtained above is a skeleton forme...

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Abstract

The invention provides a preparation method of a mesoporous silica-carbon composite material. The preparation method comprises steps as follows: (1), a mesoporous silica / surfactant composite materialis dispersed in dilute sulfuric acid, and a mixed system is obtained; (2), the mixed system is dried, and a mesoporous silica-surfactant-sulfuric acid composite material is obtained; a mesoporous silica-oligomeric carbon composite material is obtained by pre-carbonization; (3), calcination is performed, and the mesoporous silica-carbon composite material is obtained. With the adoption of the reaction system of a sulfuric acid carbonized surfactant, sulfuric acid has an effect of carbonizing organic molecules, so that carbon content of the obtained mesoporous silica-carbon composite material isquite high and can be up to 25wt%. Meanwhile, the carbon content can be regulated and controlled by changing sulfuric acid carbonization parameters and is freely regulated and controlled in a range of 5wt%-25wt%.

Description

technical field [0001] The invention relates to the technical field of composite material preparation, in particular to a method for preparing a mesoporous silica-carbon composite material. Background technique [0002] Mesoporous silica-carbon composites are an important porous material with adjustable mesoporous structure, high porosity, large specific surface area, stable chemical properties, and good biocompatibility. It has been widely used in the fields of gas adsorption and sensing. However, limited by the current preparation methods, mesoporous silica-carbon composites are mostly uniformly distributed silica and carbon, and have high hydrophilicity, so they are widely used in the sensing of volatile organic gases. Big restrictions. In recent years, some studies have studied the preparation of mesoporous silica-surfactant composite materials, after roasting to remove the surfactant, and then pouring carbon sources into the pores of the mesoporous silica material, an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B33/12C01B32/05
CPCC01B33/12C01B32/05
Inventor 赵东元刘玉普朱洪伟
Owner 深圳元颉新材料科技有限公司
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