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Preparation method and application of metal organic frameworks-mesoporous silica composite material

A metal-organic framework and mesoporous silica technology, applied in the field of material chemistry, can solve the problems of limited application, poor material stability, and difficulty in molding, and achieve the effects of cheap preparation, low cost, and increased adsorption capacity

Active Publication Date: 2015-11-18
SHANGHAI ADVANCED RES INST CHINESE ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, it should also be realized that from the perspective of practical application, the existing MOFs materials also have outstanding defects, for example: 1. Due to the low strength of the coordination bonds of its skeleton, the material stability is poor; 2. There are many MOFs materials It is an ultra-low density powder material, so it is not easy to form, which greatly limits its application in conventional adsorption devices such as fixed beds and fluidized beds.

Method used

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  • Preparation method and application of metal organic frameworks-mesoporous silica composite material
  • Preparation method and application of metal organic frameworks-mesoporous silica composite material
  • Preparation method and application of metal organic frameworks-mesoporous silica composite material

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Experimental program
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Effect test

Embodiment 1

[0077] Take 10g template agent: P123 dissolved in 100g water, add 10g concentrated hydrochloric acid, stir at 40°C for 6h. Then, 10 g of mesitylene was added to the above solution, and stirring was continued for 4 h. Then add 20 g of silicon source: ethyl orthosilicate to the above solution, continue to stir for 5 min and then let stand for 10 h. Finally, 100 mg of ammonium fluoride was dissolved in 10 mL of water and poured into the above solution, aged at 100° C. for 12 h and then dried to obtain silicon oxide.

[0078] The template agent was removed by solvent extraction, that is, 1 g of the above silica was extracted with 20 mL of absolute ethanol in a Soxhlet extractor for 4 h, and the precipitate was obtained by filtration; the above precipitate was dried under vacuum at 50 ° C for 20 h to obtain the desired Mesoporous silica materials.

[0079] The metal salt in the metal-organic framework material: 3.2g copper nitrate, the organic ligand: 2.4g trimesic acid were weig...

Embodiment 2

[0081] Take 10g template agent: F127 dissolved in 100g water, add 15g concentrated hydrochloric acid, stir at 60°C for 6h. Then, 10 g of mesitylene was added to the above solution, and stirring was continued for 4 h. Then add 20 g of silicon source: ethyl orthosilicate to the above solution, continue to stir for 5 min and then let stand for 10 h. Finally, 200 mg of ammonium fluoride was dissolved in 10 mL of water and poured into the above solution, aged at 100° C. for 12 h and then dried to obtain silicon oxide.

[0082] The template agent was removed by solvent extraction, that is, 1 g of the above silica was extracted with 20 mL of absolute ethanol in a Soxhlet extractor for 4 h, and the precipitate was obtained by filtration; the above precipitate was dried under vacuum at 50 ° C for 20 h to obtain the desired Mesoporous silica materials.

[0083] The metal salt in the metal-organic framework material: 3.2g of copper nitrate, and the organic ligand: 1.2g of trimesic acid...

Embodiment 3

[0085] Take 10g template agent: P123 dissolved in 100g water, add 10g concentrated hydrochloric acid, stir at 40°C for 6h. Then, 10 g of mesitylene was added to the above solution, and stirring was continued for 4 h. Then add 20 g of silicon source: sodium silicate to the above solution, continue to stir for 5 min and then let stand for 10 h. Finally, 100 mg of ammonium fluoride was dissolved in 10 mL of water and poured into the above solution, aged at 100° C. for 12 h and then dried to obtain silicon oxide.

[0086] The template agent was removed by high-temperature calcination, that is, 1 g of the above-mentioned silicon oxide was roasted for 6 hours at 500° C. in an air atmosphere to obtain the desired mesoporous silicon oxide material.

[0087] The metal salt in the metal-organic framework material: 3.2g copper nitrate, the organic ligand: 2.4g trimesic acid were weighed and dissolved in 25mL N,N-dimethylformamide. Then weigh 0.76g of mesoporous silica material and pour...

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Abstract

The invention provides a metal organic frameworks-mesoporous silica composite material which is prepared by hydrothermal reaction compounding of metal organic frameworks and a mesoporous silica material, and further comprises a preparation method and application of the metal organic frameworks-mesoporous silica composite material. According to the preparation method and the application of the metal organic frameworks-mesoporous silica composite material, a material which is large in specific surface area and high in crystal form degree, carbon dioxide adsorbability and selectivity is obtained through a certain interaction between the surface of mesoporous silica and the metal organic frameworks, and the thermal stability of the material is superior to that of a pure MOFs constituting the composite material, and the synthetic method of the material is simple, efficient, good in repeatability and relatively low in cost.

Description

technical field [0001] The invention belongs to the field of material chemistry, and in particular relates to a preparation method of a metal organic framework compound-mesoporous silicon oxide composite material and its application in carbon dioxide adsorption. Background technique [0002] In 2014, the leaders of China and the United States jointly issued the "Sino-US Joint Statement on Climate Change" in Beijing, reaffirming the importance of strengthening bilateral cooperation on climate change. Scope emission reduction target; China plans to reach the peak of carbon dioxide emissions around 2030 and will strive to achieve it as soon as possible. At the same time, the two countries jointly proposed the measures of "promoting major demonstrations of carbon capture, utilization and storage" to strengthen cooperation between the two countries. [0003] At present, carbon dioxide capture, utilization and storage technology (CCUS) is a carbon dioxide emission reduction techn...

Claims

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Application Information

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IPC IPC(8): B01J20/22B01J20/28B01J20/30B01D53/02
CPCY02C20/40
Inventor 孙予罕魏伟朱晨明孙楠楠张中正王慧杨秀云
Owner SHANGHAI ADVANCED RES INST CHINESE ACADEMY OF SCI
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