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Preparation method of novel metal organic skeleton ZIF-300 membrane

A ZIF-300 and metal-organic framework technology, which is applied in the field of preparation of new metal-organic framework ZIF-300 membranes, can solve the problems of poor structural stability and low separation performance

Active Publication Date: 2019-02-05
NANJING TECH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Many metal-organic frameworks have poor structural stability in water and low separation performance

Method used

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  • Preparation method of novel metal organic skeleton ZIF-300 membrane

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Using this method to prepare ZIF-300 film on the surface of aluminum oxide sheet

[0025] Choose sheet-type alumina as the support body, polish the first side of the support body with 1200-mesh sandpaper, rinse it with water, and dry it. Weigh 0.5085g of Zn(NO 3 )6H 2 O (mass percentage concentration is 0.7%), 0.1755g of 2-methylimidazole (mass percentage concentration is 0.2%), 0.423g of 5,6-1H-benzimidazole (mass percentage concentration is 0.6%) Dissolve in 67.3mL of N,N-dimethylformamide and 3.75mL of deionized water mixed solution and stir well, react at 120°C for 72h, the obtained ZIF-300 crystals are centrifuged and washed with N,N - Dimethylformamide, which is washed and dried under vacuum at 180°C for 24 hours for later use.

[0026] Disperse 1.5g of ZIF-300 crystals in 10mL of DMF solution (mass percentage concentration is 15%), ultrasonic dispersion power is 400W; ultrasonic time is 40min; then take it out and let it stand for 15min, select the upper layer...

Embodiment 2

[0029] Using this method to prepare ZIF-300 film on the surface of aluminum oxide sheet

[0030] Choose sheet alumina as the support body, polish the first side of the support body with 1400-mesh sandpaper, rinse it with water and dry it. Weigh 0.5085g of Zn(NO 3 )6H 2 O (mass percentage concentration is 0.7%), 0.1755g of 2-methylimidazole (mass percentage concentration is 0.2%), 0.423g of 5,6-1H-benzimidazole (mass percentage concentration is 0.6%) Dissolve in 67.3mL of N,N-dimethylformamide and 3.75mL of deionized water mixed solution and stir well, react at 100°C for 96h, the obtained ZIF-300 crystals are centrifuged and washed with N,N - Dimethylformamide, which is washed and dried under vacuum at 150° C. for 48 hours for later use.

[0031] Disperse 1.2g of ZIF-300 crystals in 10mL of DMF solution (mass percentage concentration is 12%), ultrasonic dispersion power is 300W; ultrasonic time is 50min; then take it out and let it stand for 25min, select the upper layer con...

Embodiment 3

[0034] Using this method to prepare ZIF-300 film on the surface of aluminum oxide sheet

[0035] Choose sheet-type alumina as the support body, polish the first side of the support body with 1600-mesh sandpaper, rinse it with water, and dry it. Weigh 0.2542g of Zn(NO 3 )6H 2 O (mass percentage concentration is 0.35%), 0.0877g of 2-methylimidazole (mass percentage concentration is 0.12%), 0.2115g of 5,6-1H-benzimidazole (mass percentage concentration is 0.3%) Dissolve in 67.3mL of N,N-dimethylformamide and 3.75mL of deionized water mixed solution and fully stir, react at 80°C for 120h, the obtained ZIF-300 crystals are centrifuged and washed with N,N - Dimethylformamide, which was washed and dried under vacuum at 160°C for 48 hours for later use.

[0036] Disperse 1.5g of ZIF-300 crystals in 10mL of DMF solution (mass percentage concentration is 15%), ultrasonic dispersion power is 400W; ultrasonic time is 60min; then take it out and let it stand for 10min, select the upper ...

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Abstract

The invention relates to a preparation method of a novel metal organic skeleton ZIF-300 membrane. The membrane adopts a flaky ceramic membrane as a supporting body, a crystal seed layer is prepared onthe surface of the supporting body by virtue of an immersion-lifting method, and then a continuous complete and flawless metal organic skeleton ZIF-300 membrane can be prepared by virtue of secondarygrowth reaction. The prepared novel metal organic skeleton ZIF-300 membrane can be used for the fields for researching organic dyes, interception of heavy metal ions and gas separation. The preparednovel metal organic skeleton ZIF-300 membrane is not only good in application prospect in the fields of water treatment and gas separation, but also is simple in production process and easy in industrialized mass production.

Description

technical field [0001] The invention relates to a method for preparing a novel metal-organic framework ZIF-300 membrane. The prepared novel metal-organic framework membrane can be used in research fields such as organic dyes, retention of heavy metal ions, and gas separation. Background technique [0002] In recent years, with the large-scale development of industries, such as electroplating industry, mining, battery, tanneries, oil refining, paint, pesticide and dye industries, heavy metal ions are directly or indirectly discharged into the environment, causing large area of ​​environmental pollution. Unlike other organic pollutants, heavy metal ions are non-biodegradable and have serious damage to the body, causing many diseases in the human body. Therefore, heavy metal ions in wastewater must be collected for centralized treatment before discharge. Membrane separation technology is playing an increasingly important role in the field of water treatment due to its advanta...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D71/06B01D69/10B01D69/02B01D67/00C02F1/44C02F101/20
CPCB01D67/0002B01D67/0079B01D69/02B01D69/10B01D71/06C02F1/44C02F2101/20
Inventor 金万勤袁建伟刘公平
Owner NANJING TECH UNIV