Preparation method for honeycomb small-pore-size mesoporous silica

A technology of mesoporous silica and small pore size, applied in the direction of silica, silica, etc., can solve the problems of poor channel uniformity, high synthesis cost, and low channel order.

Inactive Publication Date: 2014-08-13
TAISHAN MEDICAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] At present, the existing problems in the synthesis of small-pore mesoporous silica reported at home and abroad are: the surfactants used are generally designed and synthesized by laboratories, and are not commercial surfactants, resulting in increased synthesis costs; The channel order of the material is not high, mostly worm-like channels or a mixture of large and small pores, and the uniformity of the channels is poor

Method used

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  • Preparation method for honeycomb small-pore-size mesoporous silica
  • Preparation method for honeycomb small-pore-size mesoporous silica
  • Preparation method for honeycomb small-pore-size mesoporous silica

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Take 1.12 g of dedecyltrimethylammonium bromide and 0.32 g of sodium salicylate at room temperature and dissolve them in 28.8 ml of water, stir for 0.5 h to obtain A solution, and take another 1.70 g of Na 2 SiO 3 9H 2 Dissolve O in 28.8 ml of water to obtain solution B; quickly mix solution A and solution B, and add 2 mol / L sulfuric acid solution dropwise to the above mixture under vigorous stirring until the pH is 9-10; Heated at constant temperature in an oven for 72 hours, filtered the obtained solid precipitate, washed with water and dried in air to obtain a composite product; the composite product was placed in a muffle furnace and heated in air at a speed of 1.5 °C / min to 550°C, constant temperature calcination for 5 hours to obtain honeycomb mesoporous silica with small pore size.

Embodiment 2

[0036] Dissolve 1.12 g of dedecyltrimethylammonium bromide and 0.19 g of sodium salicylate in 28.8 ml of water at room temperature, stir for 0.5 h to obtain solution A, and take another 1.70 g of Na 2 SiO 3 9H 2 Dissolve O in 28.8 ml of water to obtain solution B; quickly mix solution A and solution B, and add 2 mol / L sulfuric acid solution dropwise to the above mixture under vigorous stirring until the pH is 9-10; Heated at constant temperature in an oven for 72 hours, filtered the obtained solid precipitate, washed with water and dried in air to obtain a composite product; the composite product was placed in a muffle furnace and heated in air at a speed of 1.5 °C / min to 550°C, constant temperature calcination for 5 hours to obtain honeycomb mesoporous silica with small pore size.

Embodiment 3

[0038] Dissolve 1.12 g of dedecyltrimethylammonium bromide and 0.51 g of sodium salicylate in 28.8 ml of water at room temperature, stir for 0.5 h to obtain solution A, and take another 1.70 g of Na 2 SiO 3 9H 2 Dissolve O in 28.8ml of water to obtain solution B; quickly mix solution A and solution B, and add 2 mol / L sulfuric acid solution dropwise to the above mixture under vigorous stirring until the pH is 9-10; Heated at constant temperature in an oven for 72 hours, filtered the obtained solid precipitate, washed with water and dried in air to obtain a composite product; the composite product was placed in a muffle furnace and heated in air at a speed of 1.5 °C / min to 550°C, constant temperature calcination for 5 hours to obtain honeycomb mesoporous silica with small pore size.

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Abstract

The invention provides a preparation method for honeycomb small-pore-size mesoporous silica. The method comprises: employing a short-chain cationic surfactant and sodium salicylate for compounding for forming a template, taking sodium silicate as a silicon source, employing a sol-gel method to prepare the honeycomb small-pore-size mesoporous silica. The honeycomb small-pore-size mesoporous silica possesses the pore size of 2.0-2.5 nm, the specific surface area of 1300-1900 m<2> / g, and the pore volume of 0.61-0.98 cm<3> / g. According to the preparation method, a commercialized surfactant is employed, so that the synthesis cost is reduced; and the prepared honeycomb small-pore-size mesoporous silica is high in orderliness of pore channels, uniform in pore size and large in specific surface area, and large-scale production of small-pore-size mesporous silica is facilitated.

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 preparation method of honeycomb-shaped small-aperture mesoporous silica. Background technique [0002] In 1992, the staff of Mobil Petroleum Company in the United States used alkyl quaternary ammonium cationic surfactants as templates for the first time to successfully synthesize a series of mesoporous silicate materials. Mesoporous materials have quickly attracted great attention from the fields of international chemistry, materials science, and pharmacy, and become one of the interdisciplinary research hotspots. The uniform pores, high specific surface area and relatively good thermal stability of mesoporous molecular sieves make them have very broad application prospects in the fields of fine chemical catalysis, separation of biological macromolecules and functional materials. [0003] In practical...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B33/12
Inventor 朱延美王仁亮张文平李莉葛海燕
Owner TAISHAN MEDICAL UNIV
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