Modified and unmodified mesoporous metal organic framework compounds and their preparation and application

A metal-organic framework and organic framework technology, applied in the field of material chemistry, can solve the problems of unfavorable catalysts and weak adsorption capacity, and achieve excellent photocatalytic reduction ability, convenient operation, simple and reliable steps

Active Publication Date: 2020-04-07
FUJIAN INST OF RES ON THE STRUCTURE OF MATTER CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, these catalysts are usually based on noble metal-based materials. Considering the cost issue, these catalysts are not conducive to further application in reagent catalysis.
In order to solve this problem, titania-based photocatalysts have attracted more and more attention. However, this catalyst has two major defects: 1) CO 2 The adsorption capacity is weak, and 2) is the light in the ultraviolet region

Method used

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  • Modified and unmodified mesoporous metal organic framework compounds and their preparation and application
  • Modified and unmodified mesoporous metal organic framework compounds and their preparation and application
  • Modified and unmodified mesoporous metal organic framework compounds and their preparation and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0057] Example 1 Bifunctional MOFs material sample 1 # Synthesis

[0058] Weigh 3.3g of 1,2,4,5-pyromellitic acid into a reaction bottle containing 50 ml of deionized water, stir for 5 minutes until the ligands are completely dissolved, and then weigh 1g of 2-amino p- Phthalic acid, put into the above solution, continue to stir. After the ligand is dissolved, weigh 2.3 g of zirconium tetrachloride and put it into the above solution, and continue to stir. Then the above solution was refluxed at 100° C. for 24 hours. After cooling to room temperature, the product obtained above was washed three times with deionized water. Finally, put the product obtained above into 50 ml of deionized water, and continue to reflux for 16 hours under the condition of 100° C. to remove unreacted ligands. Finally, the obtained solid product was dried in a vacuum oven at 70°C for 8 hours to obtain the mesoporous metal-organic framework compound, designated as sample 1 # .

Embodiment 2

[0061] Example 2 Bifunctional MOFs material sample 1 # Synthesis

[0062] Adjust the ratio of raw materials and reaction conditions. The specific preparation steps and other conditions are the same as in Example 1. The relationship between the sample number of the obtained sample and the ratio of raw materials and reaction conditions is shown in Table 1.

[0063] Table 1

[0064]

[0065]

Embodiment 3

[0066] Example 3 Synthesis of Modified Mesoporous MOFs Materials

[0067] Put 15g of glucose in 25ml of deionized water, ultrasonically dissolve it, then transfer it to a 50ml microwave reaction bottle, and then dry sample 1 in Example 1 # 200 mg was put into the glucose solution, then sealed, put into a microwave reactor, and reacted for 10 minutes at 130°C. After the obtained solid was cleaned by centrifugation, it was dried in a vacuum oven for 8 hours to obtain a glucose-modified MOFs material, designated as sample S1 # .

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Abstract

The application discloses a mesoporous metal-organic framework compound and a preparation method thereof. The mesoporous metal-organic framework compound has amino functional groups and carboxyl functional groups on an organic framework. The application further discloses a modified mesoporous metal-organic framework compound and a preparation method thereof. The modified mesoporous metal-organic framework compound is a mesoporous metal-organic framework compound modified by a polycarbonyl aldehyde compound. The mesoporous metal-organic framework compound and the modified mesoporous metal-organic framework compound have the advantages of high CO2 capture ability, good cycling performance, absorbing capacity in the visible area or even near-infrared area and excellent photocatalytic reduction capability; a product is CO and the selectivity is 99 percent or above. The preparation method provided by the application has the advantages of simple and reliable steps, good repeatability, convenience in operation and capability of carrying out large-scale preparation.

Description

technical field [0001] The application relates to modified and unmodified mesoporous metal organic framework compounds and their preparation methods and applications, belonging to the field of material chemistry. Background technique [0002] At present, a large part of the source of energy comes from fossil fuels. Then, the combustion of fossil fuels such as coal, oil, etc. will produce a large amount of greenhouse gas - carbon dioxide (CO 2 ), leading to global temperature rise and even destroying existing ecosystems. Therefore, CO 2 The capture, separation and transformation of these compounds is an urgent problem to be solved. The photocatalysts that are studied more today mainly include semiconductors (such as CdS, etc.), metal-doped zeolite materials, and metal complex materials. However, these catalysts are usually based on noble metal-based materials. Considering the cost, these catalysts are not conducive to further application in reagent catalysis. In order to...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G83/00B01D53/02B01J20/22B01J31/22B01J35/00
CPCB01D53/02B01J20/226B01J31/1691B01J35/004B01J2231/62B01J2531/46C08G83/008Y02C20/40Y02P20/151
Inventor 冯吉飞曹荣高水英
Owner FUJIAN INST OF RES ON THE STRUCTURE OF MATTER CHINESE ACAD OF SCI
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