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Method for synthesizing three-dimensional ordered double-mesoporous SBA-15 materials high in mesoporous size, adjustable in pore volume and highly polymerized in pore wall

A three-dimensional ordered, double mesoporous technology, used in chemical instruments and methods, molecular sieves and base exchange compounds, inorganic chemistry, etc.

Inactive Publication Date: 2018-04-17
HENAN NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although great progress has been made in previous studies, the synthesis of ordered hierarchically porous materials with a high degree of polymerization remains a challenge

Method used

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  • Method for synthesizing three-dimensional ordered double-mesoporous SBA-15 materials high in mesoporous size, adjustable in pore volume and highly polymerized in pore wall
  • Method for synthesizing three-dimensional ordered double-mesoporous SBA-15 materials high in mesoporous size, adjustable in pore volume and highly polymerized in pore wall
  • Method for synthesizing three-dimensional ordered double-mesoporous SBA-15 materials high in mesoporous size, adjustable in pore volume and highly polymerized in pore wall

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Dissolve 0.8g P123 in 25mL deionized water and 3mL hydrochloric acid (10M) mixed solution, add 2.4mL tetraethyl orthosilicate (TEOS) under stirring, and stir at 40°C for 2h, add inorganic salt (KCl) 0.01mol, Continue to stir at 40°C for 20h, put it into a polytetrafluoroethylene-lined stainless steel reactor and react at 180°C for 24h, take it out, cool and filter, wash, dry, and calcinate at 550°C for 4h to remove the template preparation. A three-dimensional ordered double mesoporous SBA-15 material was obtained.

Embodiment 2

[0023] Dissolve 0.8g of P123 in 25mL of deionized water and 3mL of hydrochloric acid (10M) mixture, add 2.4mL of tetraethyl orthosilicate (TEOS) under stirring, and stir at 40°C for 2h, add inorganic salt (MgCl 2 ) 0.01mol, continue to stir at 40°C for 20h, put it into a polytetrafluoroethylene-lined stainless steel reactor and react at 180°C for 24h, take it out, cool and filter, wash, dry, and calcinate at 550°C for 4h to remove The three-dimensional ordered double mesoporous SBA-15 material was prepared by removing the templating agent.

Embodiment 3

[0025] Dissolve 0.8g of P123 in 25mL of deionized water and 3mL of hydrochloric acid (10M) mixture, add 2.4mL of tetraethyl orthosilicate (TEOS) under stirring, and stir at 40°C for 2h, add inorganic salt (AlCl 3 ) 0.01mol, continue to stir at 40°C for 20h, put it into a polytetrafluoroethylene-lined stainless steel reactor and react at 180°C for 24h, take it out, cool and filter, wash, dry, and calcinate at 550°C for 4h to remove The three-dimensional ordered double mesoporous SBA-15 material was prepared by removing the templating agent.

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Abstract

The invention provides a method for synthesizing a three-dimensional ordered double mesoporous SBA‑15 material with adjustable larger mesopore content and highly polymerized pore walls, using a single surfactant polyoxyethylene‑polyoxypropylene‑polyoxyethylene P123 As a template, tetraethyl orthosilicate and inorganic salts are added at the same time. After hydrothermal reaction by adjusting different reaction temperatures and reaction times between 180-220°C, they are calcined at 550°C to obtain a series of large mesopores with adjustable content. A three-dimensional ordered double mesoporous SBA‑15 material with highly aggregated pore walls. By controlling the temperature of high-temperature crystallization and adding inorganic salts, the present invention realizes the synthesis of a series of three-dimensional ordered double mesoporous SBA‑15 materials with adjustable large mesopore content and highly polymerized pore walls. Polymerization, high stability.

Description

technical field [0001] The invention belongs to the technical field of molecular sieve synthesis, and in particular relates to a method for synthesizing a three-dimensional ordered double mesoporous SBA-15 material with adjustable larger mesopore content and highly polymerized pore walls. Background technique [0002] Since the advent of M41S mesoporous silicon series materials, due to their excellent characteristics, such as large specific surface area, easy modulation of mesoporous aperture, various shapes and large pore volume, mesoporous materials have been receiving much research work. favored by those. Compared with microporous zeolite materials, the biggest advantage of mesoporous materials is that they have a large specific surface area and large pore size, which makes mesoporous materials perform well in the catalysis of macromolecules, the sustained release of drugs, and the adsorption and separation of macromolecules. A more prominent application value. However,...

Claims

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Application Information

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IPC IPC(8): C01B39/04C01B39/48
CPCC01B39/04C01B39/48C01P2002/72C01P2004/04
Inventor 张朋玲刘统信
Owner HENAN NORMAL UNIV
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