Preparation method of microporous aluminum-based metal organic framework material with high specific surface area and water stability

A high specific surface area, organic framework technology, applied in the field of adsorption material research and development, can solve problems such as collapse, and achieve the effect of low biological toxicity, maintaining structural stability and rich content

Pending Publication Date: 2022-04-26
ZHEJIANG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The present invention aims to solve the technical problem that existing metal organic framework materials are prone to collapse when exposed to water in the actual

Method used

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  • Preparation method of microporous aluminum-based metal organic framework material with high specific surface area and water stability
  • Preparation method of microporous aluminum-based metal organic framework material with high specific surface area and water stability
  • Preparation method of microporous aluminum-based metal organic framework material with high specific surface area and water stability

Examples

Experimental program
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Example Embodiment

[0022] Example 1

[0023] 104mg of aluminum nitrate hexahydrate and 300mg of 1,3,5-trimethyl-2,4,6-tris(4-carboxyphenyl)benzene (molar ratio of 0.44:1) were placed in 15mL of N, N-dimethylformamide (DMF) organic solution, drop by drop plus 1.4mL of formic acid, after sonication for 30 minutes, so that the reactants were completely dissolved and dispersed uniformly. Place the reactants in a reactor and seal. The oven temperature is set at 130 degrees Celsius and the reaction time is 72 hours. After the end of the reaction, the reactor is cooled to room temperature, the reaction product and the mother liquor are transferred to the centrifuge tube, separated by centrifugation, and the supernatant is poured to obtain the bottom crude product. Then wash 3 to 4 times with N, N-dimethylformamide and acetone in turn, wash the clean product, put it into a vacuum drying box to dry, and finally obtain a high specific surface area and water stable microporous aluminum fund organic frame mater...

Example Embodiment

[0024] Example 2

[0025] Weigh 208mg of aluminum nitrate hexahydrate and 300mg of 1,3,5-trimethyl-2,4,6-tris(4-carboxyphenyl) benzene (molar ratio of 0.88:1) placed in 15mL of N, N-dimethylformamide (DMF) organic solution, drop by drop plus 1.7mL of formate, after sonication for 30 minutes, so that the reactants are completely dissolved and dispersed uniformly. Place the reactants in a reactor and seal. The oven temperature is set at 130 degrees Celsius and the reaction time is 72 hours. After the end of the reaction, the reactor is cooled to room temperature, the reaction product and the mother liquor are transferred to the centrifuge tube, separated by centrifugation, and the supernatant is poured to obtain the bottom crude product. Then wash 3 to 4 times with N, N-dimethylformamide and acetone in turn, wash the clean product, put it into a vacuum drying box to dry, and finally obtain a high specific surface area and water-stable microporous aluminum fund organic frame material...

Example Embodiment

[0026] Example 3

[0027] Weigh 200mg of aluminum nitrate hexahydrate and 69mg of 1,3,5-trimethyl-2,4,6-tris(4-carboxyphenyl)benzene (molar ratio of 0.44:1) placed in 10mL of N, N-dimethylformamide (DMF) organic solution, drop by drop added 1.0mL of formatic acid, after ultrasound for 30 minutes, so that the reactants are completely dissolved and dispersed evenly. Place the reactants in a reactor and seal. The oven temperature is set at 130 degrees Celsius and the reaction time is 72 hours. After the end of the reaction, the reactor is cooled to room temperature, the reaction product and the mother liquor are transferred to the centrifuge tube, separated by centrifugation, and the supernatant is poured to obtain the bottom crude product. Then washed 3 to 4 times with N, N-dimethylformamide and acetone in turn, washed the product, put it into a vacuum drying box to dry, and finally obtained a high specific surface area and water stable microporous aluminum fund organic frame materi...

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Abstract

The invention provides a synthetic method of a microporous aluminum-based metal organic framework material with high specific surface area and water stability. The method comprises the following steps: dissolving 5 '-(4-carboxyl phenyl)-2', 4 ', 6'-trimethyl-[1, 1 ': 3', 1 ''-terphenyl]-4, 4''-dicarboxylic acid as an organic ligand and a metal aluminum salt as an aluminum source in an organic solvent according to a molar ratio of 0.2: 1-4: 1, dropwise adding an acidic regulator into a mixed solution, and carrying out ultrasonic treatment for a certain time to dissolve components in the mixed solution; a crude product is prepared through a solution heat method, and the microporous aluminum-based metal organic framework material with the high specific surface area and the water stability is obtained after centrifugation, washing and drying. The microporous metal organic framework material with high specific surface area and water stability prepared by the invention not only has high specific surface area (BET specific surface area is 2344m < 2 >/g), but also can keep the structure stable in water. Besides, the material also has a rich micropore structure (the micropore volume is 0.934 cm < 3 >/g and accounts for 88.5% of the total pore volume), and has potential application value in the aspect of small molecule gas adsorption and separation.

Description

technical field [0001] The invention relates to the field of research and development of adsorption materials, in particular to a method for preparing a high specific surface area and water-stable microporous aluminum-based metal-organic framework material. Background technique [0002] Volatile organic pollutants (Volatile Organic Compounds, VOCs) refer to organic compounds with a saturated vapor pressure greater than 70Pa at normal temperature and a boiling point lower than 260°C at normal pressure. VOCs not only cause near-surface ozone (O 3 ), photochemical smog and PM2.5, and will destroy the high-altitude ozone layer. Trace VOCs also pose carcinogenic, teratogenic, and mutagenic threats to the human body. If the human body is exposed to it for a long time, it will cause sick building syndrome and other diseases. At present, VOCs treatment technologies mainly include absorption, adsorption, condensation concentration, membrane separation, catalysis and other technologi...

Claims

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Application Information

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IPC IPC(8): C08G83/00
CPCC08G83/008Y02A50/20
Inventor 杨坤胡来钢邬文浩
Owner ZHEJIANG UNIV
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