Method for synthesizing silicon oxide thin sheet with three dimension continuous nano pore structure

A technology of nanopores and silicon oxide, which is applied in the direction of silicon oxide, silicon dioxide, chemical instruments and methods, etc., can solve the problem of weak surface activity of long-chain alkyl primary amines, poor solubility in water, and poor shape control of products. Too ideal and other problems, to achieve the effect of short diffusion path, simple and easy to control method, and good application prospects

Inactive Publication Date: 2008-08-13
FUDAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, due to the weak surface activity of long-chain alkyl primary amines and poor solubility in water, the work on the shape control of products has not been ideal.

Method used

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  • Method for synthesizing silicon oxide thin sheet with three dimension continuous nano pore structure
  • Method for synthesizing silicon oxide thin sheet with three dimension continuous nano pore structure
  • Method for synthesizing silicon oxide thin sheet with three dimension continuous nano pore structure

Examples

Experimental program
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Effect test

example 1

[0027] Weigh 0.6 g of hexadecylamine and dissolve it in 60 ml of ethanol, add 60 ml of water and 2.0 g of concentrated ammonia water, and stir until hexadecylamine is completely dissolved. Under vigorous stirring, 2.4 g of ethyl orthosilicate was added, and the stirring was continued until the ethyl orthosilicate was evenly dispersed. After the stirring was stopped, it was left at room temperature for 12 hours, filtered with suction, washed with ethanol, and dried overnight at 90°C. Finally, the templating agent was removed by firing at 600°C for 4 hours in an air atmosphere. The product is marked as A 1 .

example 2～6

[0029] Synthesize by the method described in example 1, but the addition of ethyl orthosilicate changes to 0.6, 1.2, 1.8, 3.0 and 3.6 grams, the proportioning and reaction conditions of other reactants all do not change. The obtained product is denoted as A 2 、A 3 、A 4 、A 5 and A 6 .

example 7～10

[0031] Synthesize according to the method described in example 1, but the add-on of hexadecylamine is changed to 0.2, 0.3, 0.4 and 0.5 gram, the proportioning of other reactants and reaction condition all do not change. The obtained product is denoted as A 7 、A 8 、A 9 and A 10 .

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Abstract

The present invention is method of synthesizing thin silicon oxide sheet with 3D continuous nano pore structure. Available thin silicon oxide sheet material has closed laminates and the object molecule can diffuse into inside the material only through the interval between laminates. The present invention synthesizes thin silicon oxide sheet with 3D continuous nano pore structure with silicone grease as silicon source and long-chain alkyl primary amine as template agent inside alcohol / water mixture at normal temperature. The proportion of the reacted matters is regulated so as to control the thickness of sheet in nano level to submicron level. The preparation process is simple and low in cost, and the thin silicon oxide sheet has rich pores in the surface, is favorable for the diffusion of object molecule and may be used as adsorbent or catalyst carrier.

Description

technical field [0001] The invention is a method for synthesizing silicon oxide flakes with a three-dimensional continuous nanopore structure. Background technique [0002] Nanoporous silica materials have great application prospects in the fields of catalysis and adsorption due to their rich pore structure and huge specific surface area. In recent years, people have increasingly realized that, in addition to the pore size and channel structure of nanoporous silicon oxide itself, its microscopic morphology also largely affects its actual performance. One of the most important aspects is to control the size of the product at the submicron or nanometer level. Nanoparticles and nanofibers of nanoporous silica have been successively synthesized by various methods. However, due to the small size of these materials, it is inconvenient to handle during the synthesis and application. In contrast, two-dimensional nanoporous materials have obvious advantages. It has the advantages...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B33/12B01J20/10B01J21/08
Inventor 山巍王波唐颐
Owner FUDAN UNIV
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