Double-ligand zirconium MOFs adsorbent as well as preparation method and application thereof

An adsorbent and double-ligand technology, applied in the field of environmental treatment, can solve the problems of serious agglomeration, complex synthesis, poor crystallinity, etc., and achieve the effect of strong hydrophilicity, high stability, and efficient removal

Active Publication Date: 2020-04-10
HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, most metal-organic framework materials are not stable in water bodies, so it is difficult to be used in water environment treatment; secondly, due to the particularity of their materials, most of the metal-organic framework materials are relatively complex to synthesize, and the materials are usually in an amorphous state , serious agglomeration, poor crystallinity

Method used

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  • Double-ligand zirconium MOFs adsorbent as well as preparation method and application thereof
  • Double-ligand zirconium MOFs adsorbent as well as preparation method and application thereof
  • Double-ligand zirconium MOFs adsorbent as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] A preparation method of double-ligand zirconium MOFs adsorbent, comprising the following steps:

[0028] 1) 0.006mol of zirconium nitrate, 0.012mol of 2-aminoterephthalic acid (NH 2 -H 2 BDC), 0.009mol of 2-hydroxyterephthalic acid (HO-H 2 BDC), 5mL of acetic acid and 60mL of N,N-dimethylformamide were mixed and stirred at 600r / min for 2 hours to obtain an orange-red solution;

[0029] 2) Put the above orange-red solution in a reaction kettle and react in an oven for 24 hours at a reaction temperature of 150°C;

[0030] 3) After the reaction, filter, wash, and vacuum-dry at 60° C. for 24 hours to obtain a light yellow double-ligand zirconium MOFs solid powder, and the nitrogen content in the product is about 1.721%.

[0031] Performance tests were performed on the double-ligand zirconium MOFs adsorbent prepared above:

[0032] combine figure 1 As shown, the double-ligand zirconium MOFs adsorbent has good dispersibility and crystallinity, and its morphology is a mic...

Embodiment 2

[0039] A preparation method of double-ligand zirconium MOFs adsorbent, comprising the following steps:

[0040] 1) Mix 0.006mol of zirconium nitrate, 0.009mol of 2-aminoterephthalic acid, 0.009mol of 2-hydroxyterephthalic acid, 5mL of acetic acid and 50mL of N,N-dimethylformamide at a speed of Stir at 700r / min for 3 hours to obtain an orange-red solution.

[0041]2) Put the above orange-red solution in a reaction kettle and react in an oven for 23 hours at a reaction temperature of 160°C;

[0042] 3) After the reaction, filter, wash, and vacuum-dry at 60° C. for 24 hours to obtain a light yellow double-ligand zirconium MOFs solid powder, and the nitrogen content in the product is about 0.932%.

[0043] The prepared double-ligand zirconium MOFs adsorbent was applied to the adsorption of norfloxacin in water:

[0044] Weigh 10 mg of the double-ligand zirconium MOFs adsorbent prepared in Example 2, add it to 100 mL of water samples containing norfloxacin at a concentration of 3...

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Abstract

The intention discloses a preparation method of a double-ligand zirconium MOFs adsorbent, and the method comprises the following steps: 1) uniformly mixing zirconium nitrate, 2-aminoterephthalic acid,2-hydroxyterephthalic acid, acetic acid and N, N-dimethylformamide, and continuously stirring for 2-4 hours to obtain an orange red solution; 2) transferring the orange red solution into a reaction kettle to react for 20-25 hours at the reaction temperature of 140-160 DEG C; and 3) after the reaction, filtering, washing and drying to obtain faint yellow double-ligand zirconium MOFs solid powder.The double-ligand zirconium MOFs adsorbent has good norfloxacin adsorption performance, and in 100 mL of water containing norfloxacin antibiotics with the initial concentration of 35 mg/L, the adsorption amount of the double-ligand zirconium MOFs adsorbent to norfloxacin is 213.34 mg/g, and the adsorption amount of the double-ligand zirconium MOFs adsorbent to the norfloxacin antibiotics is 213.34mg/g. The adsorption capacity is kept at 70% after the adsorbent is repeatedly used for 5 times, and the adsorbent has great significance in removal and application of antibiotics.

Description

technical field [0001] The invention relates to a double-ligand zirconium MOFs adsorbent, a preparation method and an application thereof, and belongs to the technical field of environmental treatment. Background technique [0002] The antibiotic norfloxacin is a synthetic antibacterial drug. It is widely used in the medical field because of its good antibacterial properties, few side effects, and low price. However, a large amount of residue after the drug will enter the surrounding environment with the sewage. And then through the food chain enrichment effect endangering human health. The abuse of antibiotics will lead to drug resistance of pathogenic microorganisms, so that the effective dose of antibiotics to kill bacteria will continue to increase, and low doses of antibiotics will be discharged into the environment for a long time, which will cause the enhancement of drug resistance of sensitive bacteria, and drug resistance genes can also be It expands and evolves in...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/22B01J20/28B01J20/30C02F1/28C02F101/38C02F101/36C02F101/34
CPCB01J20/226B01J20/0211B01J20/28042C02F1/285C02F2101/38C02F2101/36C02F2101/34
Inventor 孔令涛方勋张开胜何军勇谢超吴子健刘锦淮
Owner HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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