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Synthetic method for porous silicon dioxide hollow micro ball

A technology of porous silica and synthesis method, applied in the direction of silica, silica, etc., can solve the problems of poor product stability, cumbersome operation, easy collapse of empty walls, etc., achieve mild reaction conditions and improve production efficiency , product quality and the effect of yield guarantee

Inactive Publication Date: 2008-03-05
FUDAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage of this method is that the operation is cumbersome, the stability of the product is not very good, and the hollow wall is easy to collapse during the removal of the templating agent.

Method used

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  • Synthetic method for porous silicon dioxide hollow micro ball

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] In TEOS(mol): C 2 h 5 OH (mol): H 2 O (mol): Span-80 (g): kerosene (g) = 1: 3: 20: 15: 40, change and add HNO 3 moles of n(HNO 3 ) / n(TEOS) is 0.5, the product is a hollow sphere, as shown in Figure 1.

Embodiment 2

[0023] In TEOS(mol):H 2 O (mol): HNO 3 (mol): Span-80 (g): kerosene (g) = 1: 20: 0.5: 15: 40 conditions, the amount of TEOS is 6ml, change C 2 h 5 The amount of OH added, in n(C 2 h 5 When OH) / n(TEOS) is 2, the product is a hollow sphere, and the SEM photo of the product is shown in Figure 2.

Embodiment 3

[0025] In TEOS(mol): C 2 h 5 OH (mol): H 2 O (mol): HNO 3 (mol): kerosene (g) = 1: 3: 20: 0.5: 40 conditions, TEOS consumption is 6ml, change the addition amount of Span-80, when Span-80 is 20g / mol TEOS, the product is a hollow sphere.

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Abstract

The present invention relates to synthesis process of hollow porous silicon dioxide micro ball. By means of combining O / W / O emulsion and sol-gel technology, using TEOS as silicon source and HNO3 as TEOS hydrolyzing catalyst, and through catalytic hydrolysis reaction at relatively high temperature, the present invention synthesizes hollow porous silicon dioxide micro ball with kerosene as oil phase and Span-80 as emulsifier. The present invention has simple process and cheap material, and the obtained hollow porous silicon dioxide micro ball has wide application foreground in catalysis, selective separation, dielectric material and other field.

Description

technical field [0001] The invention belongs to the technical field of inorganic porous hollow microspheres, and relates to a new synthesis method of porous silica hollow microspheres. Background technique [0002] Porous silica has high thermal stability, hydrothermal stability, large specific surface area, and good compatibility with other materials, so it has attracted widespread attention. At present, porous silica has been used in selective separation, catalysis, dielectric materials, prosthetic base materials, etc. In addition, people are still exploring its application in gas adsorption, inorganic material carrier, and enzyme immobilization. [0003] So far, there are three main methods for preparing hollow microspheres: spray method (CN Patent: 1689557, 2005), emulsion method combined with sol-gel method (CN Patent: 1223 240A, 1999; US Patent: 5376 347, 1994; 5 733 567, 1998; 4479 911, 1984), sacrificial nuclear method (CN Patent: 1480 401, 2004; 1506 308, 2004; 17...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B33/113C01B33/18
Inventor 岳斌周琰成云飞贺鹤勇
Owner FUDAN UNIV
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