Directional grown mesoporous adsorption material with controllable structure and preparation method thereof

An adsorption material and mesoporous technology, applied in chemical instruments and methods, other chemical processes, silicon compounds, etc., can solve the problems of lack of monolithic structure and poor order of pore structure, and achieve uniform size distribution and regular pore structure Orderly, easy-to-apply effects

Inactive Publication Date: 2009-10-21
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The purpose of the present invention is to provide a directional growth mesoporous adsorption material with controllable structure and its preparation method, which solves the problems that the material lacks a monolithic structure and the order degree of the pore structure of the material is poor

Method used

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  • Directional grown mesoporous adsorption material with controllable structure and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] (1) Preparation of silicon oxide precursor solution

[0020] Dissolve 0.687g polyvinyl ether-polypropylene ether-polyvinyl ether block copolymer (P123) in a mixture of 4.8g ethanol and 1.2g 0.2M HCl at room temperature to form a transparent and uniform P123 solution. Add 0.05 g of toluene, and stir for 2 hours. 2.08 g of ethyl orthosilicate was added dropwise into the solution and stirred for 1 hour.

[0021] (2) Composite of silicon oxide and aluminum oxide

[0022] An anodic aluminum oxide film with a diameter of 47 mm and a pore size of 200 nm is immersed in the silicon oxide precursor solution in step (1), and volatilized under vacuum for 1 hour. The aluminum oxide film was taken out and naturally crystallized for 1 day.

[0023] (3) Post-treatment of silica-alumina composite structure

[0024] 60mL of ethanol was refluxed for 12 hours to extract the block copolymer P123, and replaced with new ethanol for another 12 hours of extraction. Dry at room temperature....

Embodiment 2

[0027] (1) Preparation of silicon oxide precursor solution

[0028] Dissolve 1g of polyvinyl ether-polypropylene ether-polyvinyl ether block copolymer (P123) in a mixture of 5g of ethanol and 1g of 0.2M HCl at room temperature to form a transparent and uniform P123 solution. Add 0.15 g of mercaptopropyltrimethoxysilane, and stir for 2 hours. 2.08 g of ethyl orthosilicate was added dropwise into the solution and stirred for 1 hour.

[0029] (2) Composite of silicon oxide and aluminum oxide

[0030] An anodic aluminum oxide film with a diameter of 47 mm and a pore size of 200 nm is immersed in the silicon oxide precursor solution in step (1), and volatilized under vacuum for 1 hour. The aluminum oxide film was taken out and naturally crystallized for 1 day.

[0031] (3) Post-treatment of silica-alumina composite structure

[0032] 60mL of ethanol was refluxed for 12 hours to extract the block copolymer P123, and replaced with new ethanol for another 12 hours of extraction. ...

Embodiment 3

[0035] (1) Preparation of silicon oxide precursor solution

[0036] Dissolve 1g of polyvinyl ether-polypropylene ether-polyvinyl ether block copolymer (P123) in a mixture of 5g of ethanol and 1g of 0.2M HCl at 35°C to form a transparent and uniform P123 solution. Add 0.05 g of trimethylbenzene, and stir for 2 hours. 2.08 g of ethyl orthosilicate was added dropwise into the solution and stirred for 1 hour.

[0037] (2) Composite of silicon oxide and aluminum oxide

[0038] An anodic aluminum oxide film with a diameter of 47 mm and a pore size of 200 nm is immersed in the silicon oxide precursor solution in step (1), and volatilized under vacuum for 1 hour. The aluminum oxide film was taken out and naturally crystallized for 1 day.

[0039] (3) Post-treatment of silica-alumina composite structure

[0040] 60mL of ethanol was refluxed for 12 hours to extract the block copolymer P123, and replaced with new ethanol for another 12 hours of extraction. Dry at room temperature. ...

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Abstract

The invention relates to a directional grown mesoporous adsorption material with a controllable structure and a preparation method thereof, and belongs to the technical field of porous adsorption materials. The adsorption material has an alumina-silica composite structure and is assembled by an inorganic-organic interface in an alumina hole, and the mesoporous structure is formed in a directional growing mode along the axial direction of an alumina array hole; and the mesoporous structure of a silica phase can be controlled as a regular and ordered two-dimensional or three-dimensional structure, and the pore canal growing direction and the aperture size of the mesoporous structure are modulated by adjusting and controlling a mixture ratio of a self-assembling system and assembling conditions. The adsorption material has the advantages that the adsorption material has an integral composite structure and is convenient to apply; the pore structure is regular and ordered, the size distribution is even, and the capillary condensation is quick; the porosity is high and the adsorbing capacity is large; and the surface property is adjustable, and the adsorption material is applicable to adsorption substances with different polarities. The adsorption material can be widely applied to quick high-capacity storage of liquid gas or gas solution.

Description

technical field [0001] The invention belongs to the technical field of porous adsorption materials, and in particular relates to a directional growth mesoporous adsorption material with controllable structure and a preparation method thereof. This adsorption material is a monolithic alumina-silica composite structure, which is assembled through the inorganic-organic interface in the alumina pores, and the mesoporous structure is formed along the axial direction of the alumina array pores; this material can be widely used For rapid high-capacity storage of liquid gases or gas solutions. Background technique [0002] Adsorbent materials are a hot spot in scientific research today, and their application range is very wide, such as adsorbents for energy storage, adsorbents for water and air purification, and biological macromolecule adsorption carriers. At present, the materials used as adsorbents mainly include silicate materials, molecular sieve materials, metal materials and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/10B01J20/30B01J20/28
Inventor 何静卢珊
Owner BEIJING UNIV OF CHEM TECH
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