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Water-insoluble cyclodextrin-based metal organic framework material and preparation method thereof

An organic framework, cyclodextrin technology, applied in chemical instruments and methods, other chemical processes, water/sewage treatment, etc., can solve problems such as poor adsorption capacity of wastewater pollutants, and achieve rapid removal and mild production conditions. , the effect of a wide range of raw materials

Active Publication Date: 2021-12-07
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The technical problem to be solved by the present invention is to provide a water-insoluble cyclodextrin-based metal-organic framework material and its preparation method to overcome the poor adsorption capacity of cyclodextrin-based metal-organic framework adsorption materials for wastewater pollutants in the prior art Defects

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  • Water-insoluble cyclodextrin-based metal organic framework material and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] A water-insoluble cyclodextrin-based metal organic framework material and a preparation method thereof, the preparation steps are as follows:

[0046] Step 1: Put γ-cyclodextrin (1.3g) and potassium chloride (0.6g) in beaker 1, and use 18mL of deionized water to ultrasonically dissolve to obtain clear solution 1; meanwhile, hexachlorocyclotriphosphazene (1.3 g) Place in beaker 2, add 20mL of N,N-dimethylformamide and ultrasonically dissolve to obtain clear solution 2; add solution 2 to solution 1 drop by drop, ultrasonically treat the two solutions to mix them into a clear solution, and add 18 mL of methanol was used as the crystallization inducing molecule to obtain clear solution 3.

[0047] Step 2: After step 1 is completed, the solution 3 is crystallized in a constant temperature environment at -10°C for 24 hours to obtain crystals. The crystals were collected, washed three times with methanol, and dried in vacuum at 30°C for 8h.

[0048] Step 3: After the reactio...

Embodiment 2

[0053] A water-insoluble cyclodextrin-based metal organic framework material and a preparation method thereof, the preparation steps are as follows:

[0054] Step 1: Put α-cyclodextrin (1g) and potassium chloride (0.3g) in beaker 1, and use 19mL of deionized water to ultrasonically dissolve to obtain clear solution 1; at the same time, hexachlorocyclotriphosphazene (0.2g ) was placed in beaker 2, and 20mL of N,N-dimethylformamide was added for ultrasonic dissolution to obtain clear solution 2; Methanol was used as the crystallization inducing molecule, resulting in a clear solution 3.

[0055] Step 2: After step 1 is completed, the solution 3 is crystallized in a constant temperature environment of 10° C. for 72 hours to obtain crystals. The crystals were collected, washed three times with methanol, and dried in vacuum at 35°C for 8h.

[0056] Step 3: After the reaction in step 2 is completed, put 90mL of N,N-dimethylformamide in a round bottom flask, and add crystals (5g), ...

Embodiment 3

[0060] A water-insoluble cyclodextrin-based metal organic framework material and a preparation method thereof, the preparation steps are as follows:

[0061] Step 1: Put β-cyclodextrin (1.2g) and potassium nitrate (0.4g) in beaker 1, and ultrasonically dissolve with 20mL deionized water to obtain clear solution 1; at the same time, put phthaloyl chloride (1.6g) in To beaker 2, add 20mL of N,N-dimethylformamide to ultrasonically dissolve to obtain clear solution 2; add solution 2 dropwise to solution 1, sonicate to make the two solutions evenly mix into a clear solution, and add 22mL of ethanol as crystallization Inducing the molecule, a clear solution 3 was obtained.

[0062] Step 2: After step 1 is completed, the solution 3 is crystallized in a constant temperature environment of 10° C. for 24 hours to obtain crystals. The crystals were collected, washed three times with methanol, and dried under vacuum at 40°C for 5h.

[0063] Step 3: After the reaction in step 2 is comple...

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Abstract

The invention relates to a water-insoluble cyclodextrin-based metal organic framework material and a preparation method thereof. The method comprises the steps: mixing cyclodextrin, sylvite and deionized water, carrying out ultrasonic treatment, dropwise adding an embedding substance active molecule solution, carrying out ultrasonic treatment, adding crystallization induction molecules, standing for crystallization, washing, drying, mixing the obtained crystal, a catalyst, a cross-linking agent and a solvent, and carrying out cross-linking reaction. The method is simple, mild in production condition and suitable for industrial application; and the prepared metal organic framework material has excellent structural stability, more active sites and high specific surface area, can realize efficient enrichment of pollutants in printing and dyeing wastewater, and is beneficial to rapid removal of the pollutants.

Description

technical field [0001] The invention belongs to the field of functionalized metal-organic framework nanomaterials and preparation thereof, in particular to a water-insoluble cyclodextrin-based metal-organic framework material and a preparation method thereof. Background technique [0002] Metal-organic framework materials are a new class of porous materials with high specific surface area and porosity, and adjustable pore structure. Because of their structural diversity and rich post-modification possibilities, they are widely used in adsorption and separation, catalysis, magnetic materials and optical materials. And other fields have been widely used and has unlimited potential. As a readily available oligosaccharide, cyclodextrin has a special cavity structure and can combine with various organic and inorganic molecules to form host-guest inclusion complexes. It is widely used in the removal of pollutants in water and air. Metal-organic framework materials prepared as org...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/22B01J20/30C02F1/28
CPCB01J20/226C02F1/285
Inventor 李发学贾洁牛戈吴德群王学利俞建勇
Owner DONGHUA UNIV
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