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Flower-shaped silicon dioxide material with porous hierarchical structure and preparation method thereof

A technology of silica and hierarchical structure, applied in the direction of silica, silica, chemical instruments and methods, etc., can solve the problems of application hindrance of inorganic porous materials, metal ion desolvation, crystallization of skeleton structure and low stability , to achieve the effects of low cost, rich pore structure, and simple synthesis method

Inactive Publication Date: 2017-09-22
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] However, at present, the crystallization and stability of the skeleton structure of mesoporous materials are not high, and the problems such as desolvation caused by metal ion doping modification have caused great obstacles to the application of inorganic porous materials in production and scientific research.

Method used

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  • Flower-shaped silicon dioxide material with porous hierarchical structure and preparation method thereof
  • Flower-shaped silicon dioxide material with porous hierarchical structure and preparation method thereof
  • Flower-shaped silicon dioxide material with porous hierarchical structure and preparation method thereof

Examples

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example 1

[0035] This embodiment provides a method for equipping a flower-shaped silica material with a porous hierarchical structure, which includes the following steps:

[0036] (1) Take 0.15g of surfactant, dissolve it in 40ml of distilled water, and stir evenly. The surfactant is cetyltrimethylammonium bromide.

[0037] (2) Add the mixed solution of isopropanol and o-dichlorobenzene in the mixed homogeneous solution that step (1) obtains again, wherein mixed solution contains 15ml isopropanol and 4ml o-dichlorobenzene, stir well, every milliliter step (1) To the resulting solution was added 0.5 ml of a mixture of isopropanol and o-dichlorobenzene.

[0038] (3) Add ammonia water to the solution obtained in step (2), adjust the pH within the range of 10-11, then add 0.5ml tetraethyl silicate to the mixed solution, stir for 3 hours, wash the product and dry it. The volume ratio of tetraethyl acid tetraethyl ester and the solution obtained in step 2 is 1:120.

[0039] (4) Calcining t...

example 2

[0043] This embodiment provides a method for equipping a flower-shaped silica material with a porous hierarchical structure, which includes the following steps:

[0044] (1) Take 0.15g of surfactant, dissolve it in 35ml of distilled water, and stir evenly. The surfactant is cetyltrimethylammonium bromide.

[0045] (2) Add the mixed solution of isopropanol and o-dichlorobenzene in the mixed homogeneous solution that step (1) obtains again, wherein mixed solution contains 15ml isopropanol and 4ml o-dichlorobenzene, stir well, every milliliter step (1) To the resulting solution was added 0.6 ml of a mixture of isopropanol and o-dichlorobenzene.

[0046] (3) Add ammonia water to the solution obtained in step (2), adjust the pH within the range of 10-11, then add 0.5ml tetraethyl silicate to the mixed solution, stir for 3 hours, wash the product and dry it. The volume ratio of tetraethyl acid tetraethyl ester and the solution obtained in step 2 is 1:120.

[0047] (4) Calcining t...

example 3

[0050] This embodiment provides a method for equipping a flower-shaped silica material with a porous hierarchical structure, which includes the following steps:

[0051] (1) Take 0.15g of surfactant, dissolve it in 30ml of distilled water, and stir evenly.

[0052] (2) Add the mixed solution of isopropanol and o-dichlorobenzene in the mixed homogeneous solution that step (1) obtains again, wherein mixed solution contains 15ml isopropanol and 4ml o-dichlorobenzene, stir well, every milliliter step (1) To the resulting solution was added 0.7 ml of a mixture of isopropanol and o-dichlorobenzene.

[0053] (3) Add ammonia water to the solution obtained in step (2), adjust the pH within the range of 10-11, then add 0.5ml tetraethyl silicate to the mixed solution, stir for 3 hours, wash the product and dry it. The volume ratio of acid tetraethyl ester and the solution obtained in step 2 is 1:120.

[0054] (4) Calcining the dried product at 550° C. to obtain the flower-shaped silica...

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Abstract

The invention discloses a flower-shaped silicon dioxide material with a porous hierarchical structure and a preparation method thereof. A porous functional composite material is synthesized by taking a quaternary ammonium type surfactant as a template agent and a benzene compound as an emulsifier, hydrolyzing a silicon source under an alkaline condition, and carrying out micro-emulsion reaction under a room-temperature condition. The flower-shaped silicon dioxide material with the porous hierarchical structure and the preparation method thereof have the advantages that the preparation method is simple, and low cost and high repeatability are achieved, so that the preparation method is suitable for industrial production; the silicon dioxide material prepared by the method has the flower-shape-like porous hierarchical structure, and has high specific surface area and abundant pore channel structures, so that the silicon dioxide material can be widely applied to various fields including microelectronics, biology, catalysis and the like.

Description

technical field [0001] The invention relates to a flower-shaped silicon dioxide material with a porous hierarchical structure and a preparation method thereof. Background technique [0002] Inorganic porous materials have large specific surface area and high adsorption capacity, so they are widely used in various fields such as inorganic catalysis and drug immobilization. In 1992, the synthesis of MCM-41 silicon oxide material attracted widespread attention. This material has uniform and hexagonally ordered pores, and the pore diameter can be continuously adjusted in the range of 1.5-10nm. It has a high specific surface area and good thermal stability. And hydrothermal stability, showing broad application prospects in the fields of macromolecular catalysis, adsorption and separation. Mesoporous silica not only has the good biocompatibility and thermal stability of silica materials, but also has a large specific surface area and rich pore structure, so it has received extens...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B33/18B01J20/20
CPCC01B33/18B01J20/20C01P2004/03C01P2004/04C01P2004/62C01P2006/12C01P2006/16
Inventor 阳晓宇张力吴思明朱晓羽
Owner WUHAN UNIV OF TECH
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