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Method for synthesizing highly ordered super-microporous silicon dioxide

A silica, highly ordered technology, applied in the field of synthesizing ultra-microporous silica, can solve the problems of low degree of commercialization, difficult to buy, high economical and environmental costs, and achieve high pore order and cost. Inexpensive, low-cost effects

Inactive Publication Date: 2017-09-22
SHANDONG FIRST MEDICAL UNIV & SHANDONG ACADEMY OF MEDICAL SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The main disadvantage of the above-mentioned pore molecular sieve method is that the template agent is self-made in the laboratory, the degree of commercialization is not high, it is not easy to buy, and the economic and environmental costs of synthesis are too high

Method used

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  • Method for synthesizing highly ordered super-microporous silicon dioxide
  • Method for synthesizing highly ordered super-microporous silicon dioxide
  • Method for synthesizing highly ordered super-microporous silicon dioxide

Examples

Experimental program
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Embodiment 1

[0018] At room temperature, dissolve 1.12g of dedecyltrimethylammonium bromide in 29ml of water, stir for 0.5h to obtain solution A, and take another 1.72g of Na 2 SiO 3 9H 2 Dissolve O in 29ml of water to obtain solution B; quickly mix solutions A and B, and add 2M sulfuric acid solution drop by drop to the above mixture under vigorous stirring until the pH is between 9 and 10; After 72 hours, filter, wash with water, dry in air, and roast at 560°C for 4-5 hours to obtain the product.

Embodiment 2

[0020] At room temperature, get 1.12g dedecyltrimethylammonium bromide (C 10 TAB) and 0.098g sodium acetate were dissolved in 29ml water, stirred for 0.5h to obtain solution A, and another 1.72g Na 2 SiO 3 9H 2 Dissolve O in 29ml of water to obtain solution B; quickly mix solutions A and B, and add 2M sulfuric acid solution drop by drop to the above mixture under vigorous stirring until the pH is between 9 and 10; After 72 hours, filter, wash with water, dry in air, and roast at 560°C for 4-5 hours to obtain the product.

Embodiment 3

[0022] The preparation method is the same as in Example 2, except that "0.098g sodium acetate" in Example 2 is replaced with "0.13g sodium butyrate".

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Abstract

The invention relates to a method for synthesizing super-microporous silicon dioxide by using a short-chain cationic surfactant (decyltrimethylammonium bromide, namely C10TAB) as a template and sodium caprylate as a co-surfactant. The method comprises the following steps that the short-chain cationic surfactant, sodium octanoate, a silicon source and water are mixed at room temperature in the molar ratio of 1:X:5:800 and stirred for 0.5 h, then the pH value is adjusted to 9-10 by using 2M sulfuric acid, then a hydrothermal reaction is conducted for 72 hours at the temperature of 80 DEG C, and the product is filtered, washed with water, dried in the air and roasted for 4-5 hours at the temperature of 560 DEG C to obtain the product. The silicon source used in the method is sodium silicate, wherein X ranges from 0.25 to 0.35. The method is mild in reaction condition and low in cost, the product is high in pore order, and a novel method for large-scale development and utilization of the super-microporous silicon dioxide in the future is provided.

Description

technical field [0001] The invention belongs to the fields of inorganic chemistry, physical chemistry, material science and catalytic chemistry, and in particular relates to a method for synthesizing ultramicroporous silicon dioxide. Background technique [0002] Supermicroporous molecular sieve refers to a porous material whose pore size is between micropores (pore size <1.0nm) and mesoporous (pore size greater than 2nm and less than 50nm). As an important "bridge" between microporous and mesoporous materials, ultramicroporous materials are of great significance in shape-selective catalysis and selective adsorption. The pore size of microporous materials is small, such as organic macromolecules and pharmaceutical intermediates, etc. are difficult to enter, while the M41s series of mesoporous molecular sieves, with a pore size above 2.0nm, is difficult to show an ideal choice for catalytic objects with a kinetic size smaller than 2.0nm Shape catalysis; Wenbin Hu et al. (...

Claims

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Application Information

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IPC IPC(8): C01B33/12
CPCC01B33/12C01P2002/72C01P2004/03C01P2004/04C01P2006/12
Inventor 王仁亮朱延美李志文冀海伟葛海燕王晓鹏
Owner SHANDONG FIRST MEDICAL UNIV & SHANDONG ACADEMY OF MEDICAL SCI
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