Ordered porous silica and silicon carbonitride and preparation method and application thereof

A technology of porous silica and silicon carbonitride, applied in porous silica, ordered porous silica, preparation of the ordered porous silica and ordered porous carbonitride, porous carbonitride Silicon field

Inactive Publication Date: 2010-07-14
SOUTHWEAT UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

So far, there is no report about the preparation of ordered porous silica and ordered silicon carbonitride using egg white as a template

Method used

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  • Ordered porous silica and silicon carbonitride and preparation method and application thereof
  • Ordered porous silica and silicon carbonitride and preparation method and application thereof
  • Ordered porous silica and silicon carbonitride and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Example 1: At 30°C, 10 grams of egg whites were vigorously stirred for 2 hours, and the egg whites became foamy. 1 g of tetraethyl silicate was added and stirring was continued for 30 hours. After the reaction, the mixture was dried to obtain the egg white-silica complex (see image 3 ), baked at 550°C for 6 hours to remove the protein template, and an ordered porous silica material was obtained (see Figure 4 ). This material replicates the structure of egg white, the pores are orderly, the pores are rectangular, about 8-20 microns long, 1-3 microns wide, and the specific surface area is 62.72m 2 / g. Its XRD and FT-IR spectrum see Figure 5 with Image 6 .

Embodiment 2

[0035] Example 2: At 30°C, 10 grams of egg whites were vigorously stirred for 2 hours, and the egg whites were foamy. 1 g of tetraethyl silicate was added and stirring was continued for 30 hours. After the reaction, the mixture was dried to obtain the egg white-silica complex (see image 3 ), and fired in an argon atmosphere at 1300°C for 3 hours to obtain an ordered porous silicon carbonitride material (see Figure 7 ). This material replicates the structure of egg white, the pores are orderly, the pores are rectangular, about 5-20 microns long, 1-3 microns wide, and the specific surface area is 76.05m 2 / g. Its XRD and FT-IR spectrum see Figure 8 with Figure 9 .

Embodiment 3

[0036] Example 3: At 20° C., 40 grams of egg whites were vigorously stirred for 3 hours, and the egg whites became foamy. 1 g of tetraethyl silicate was added and stirring was continued for 8 hours. The reaction mixture was dried, and the obtained egg white-silicon dioxide composite was calcined at 550° C. for 6 hours to remove the protein template to obtain an ordered porous silica material. This material also replicates the structure of egg white, the pores are orderly, the pores are rectangular, about 8-20 microns long, 1-3 microns wide, and the specific surface area is 39.40m 2 / g.

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Abstract

The invention relates to the technical field of ordered porous materials, in particular to a highly ordered porous silica and a porous silicon carbonitride material and a preparation method and application thereof. Under a certain temperature, egg white adopted as template and structure-directing agent is stirred and then hydrolytically polycondensed through oil-soluble silicon source capable of controlling hydrolysis, and the template is removed from the obtained mixture under different roasting conditions, so that the ordered porous silica and the ordered porous silicon carbonitride material can be respectively obtained. The two materials have the unique ordered structure of the egg white, and have a specific surface area and good heat stability. Compared with the conventional method, the invention has the advantages of low cost, simple preparation technique, environment-friendliness and the like, and the obtained materials have a broad application prospect in fields such as the controlled release, separation, adsorption and catalysis of large biological molecules and proteins.

Description

technical field [0001] The invention relates to the technical field of ordered porous materials, in particular to a highly ordered porous silicon dioxide and a porous silicon carbonitride. The invention also relates to a method for preparing the ordered porous silicon dioxide and ordered porous silicon carbonitride. Another aspect of the present invention relates to the use of the ordered porous silica in the fields of controlled release, separation, adsorption and catalysis of biological macromolecules and proteins. technical background [0002] Egg white itself has the advantages of non-toxicity, easy foaming, emulsification, gelation, low price, good biocompatibility, and environmental friendliness, etc., and has a very broad application prospect. Most of the research on egg white is in the food industry and biology. There are relatively few researches on using egg white as a template to prepare various materials at home and abroad. Santi et al prepared NiFe through the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B33/18B01J20/10B01J21/08
Inventor 裴重华马拥军杨发禄周勇罗庆平代波
Owner SOUTHWEAT UNIV OF SCI & TECH
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