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Defective MIL-53 (Al) metal organic framework and preparation method and application thereof

A metal-organic framework, defect technology, applied in chemical instruments and methods, other chemical processes, water/sludge/sewage treatment, etc., can solve problems such as difficulty in adsorption, and achieve convenient operation, improved fluorine adsorption capacity, and low cost. Effect

Active Publication Date: 2018-04-13
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It can be seen that although many researched defluorinated materials are continuously improving the adsorption capacity, it is still difficult to adsorb high concentrations above 1000ppm. Therefore, it is particularly important to prepare large-capacity defluorinated materials.

Method used

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  • Defective MIL-53 (Al) metal organic framework and preparation method and application thereof
  • Defective MIL-53 (Al) metal organic framework and preparation method and application thereof
  • Defective MIL-53 (Al) metal organic framework and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] According to the synthetic stoichiometric ratio, take 5mmol (0.8365g) of Al(NO 3 ) 3 , 5mmol (1.87565) of terephthalic acid, mixed and added to the mixed liquid of 20mL ultrapure water and 20mL absolute ethanol, using a magnetic stirrer to stir evenly, so that the reactants are fully dissolved in the solvent, in order to further strengthen the dissolution (organic Difficult to dissolve), use an ultrasonic cleaner to sonicate for 30min, then add the mixed solution into a 60ml polytetrafluoroethylene-lined reaction kettle, package, and react in an electric blast drying oven at 170°C for 24h, at room temperature under Cool to obtain a pure white product, its appearance belongs to long filaments, and the product is alternately washed 6 times with ultrapure water and absolute ethanol, and left to stand at room temperature until the material settles. After pouring off the supernatant, the product is placed in 60 °C in a blast drying oven for 12 hours to obtain MIL-53(Al) mat...

Embodiment 2

[0032] According to the method of Example 1, the added solvent was changed to 40 ml of absolute ethanol to prepare a strip-shaped MIL-53 (Al) material, which was dried and waited for defluorination performance research.

Embodiment 3

[0034] According to the method of Example 1, the added solvent was changed to 40ml of methanol, and the white microscopic appearance of filaments and long strips of MIL-53 (Al) material was prepared, which was dried and waited for the defluorination performance research.

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Abstract

The invention belongs to the technical field of material synthesis, and particularly relates to a defective MIL-53 (Al) metal organic framework and a preparation method and application thereof. Metalsalt and an organic ligand are used as raw materials, and by using methanol, ethanol, ethanol and water, N,N-2-methylformamide and the like as organic solvents, linear MIL-53 (Al) is obtained througha reaction at 160-200 DEG C for 12-48 hours. The metal organic framework with large-capacity fluoride removing performance is obtained by adjusting a proper synthesis condition. The preparation methodhas the advantages of high raw material utilization rate, short synthesis time and the like, and a promising synthesis idea is provided for exploring highly-efficient adsorbing material synthesis.

Description

Technical field: [0001] The invention belongs to the technical field of adsorption materials, and relates to a large-capacity defluoridation MIL-53(Al) and its preparation method and application. Background technique: [0002] Metal-organic framework MIL-53(Al), as the third-generation flexible metal-organic framework, has been widely studied in many fields such as catalysis, carbon dioxide adsorption, heavy metal ion adsorption, drug adsorption, organic matter adsorption, and hydrogen storage. The synthesis of MIL-53(Al) mainly adopts two methods: hydrothermal method and microwave method. Vera I.Isaeva synthesized MIL-53(Al) in two ways and compared them, and found that the morphology of MIL-53(Al) synthesized by microwave method was smaller, and the crystal face of the generated MIL-53(Al) had different. The hydrothermal method needs 72h at 220°C to obtain the shaped block MIL-53(Al). Among them, the microwave method produces smaller product particles, and the yield is ...

Claims

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Application Information

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IPC IPC(8): B01J20/30B01J20/22C02F1/28C02F101/14
CPCB01J20/226C02F1/285C02F2101/14
Inventor 王海鹰黄磊杨志辉柴立元宋宝成杨卫春唐崇俭李青竹廖骐刘恢
Owner CENT SOUTH UNIV
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