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Preparation method and application of modified ZIF-8/GO composite membrane

A technology of ZIF-8 and composite membrane, applied in chemical instruments and methods, membrane technology, semi-permeable membrane separation, etc., can solve copper pollution accidents, copper health problems and other problems, and achieve the effect of improving adsorption capacity

Inactive Publication Date: 2019-03-29
CHANGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Once copper-containing wastewater enters rivers and other water bodies, it is easy to cause copper pollution accidents, and high concentrations of copper can cause serious health problems

Method used

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  • Preparation method and application of modified ZIF-8/GO composite membrane
  • Preparation method and application of modified ZIF-8/GO composite membrane
  • Preparation method and application of modified ZIF-8/GO composite membrane

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] (1) Take 0.539g Zn(NO 3 ) 2 and 3.234g of 2-Im were respectively dissolved in 40mL of methanol, and ultrasonically stirred for 30min. It was centrifuged for 15 min, washed with methanol three times and filtered, and the obtained powder was vacuum-dried in an oven at 85°C.

[0030] (2) Dissolve 0.2 g of the product obtained in (1) in 30 mL of methanol, and add 0.125 mL of APTES. The reaction was refluxed at 70°C for 5h. After cooling, the product was washed several times with dichloromethane and dried.

[0031] (3) Disperse 200 mg of graphene oxide in 200 mL of distilled water, add 1 mL of APTES, first ultrasonically stir for 30 min, and then mechanically stir for 24 h.

[0032] (4) The product of step (3) was washed with deionized water and centrifuged for 15 min to obtain sediment, and finally dried at 60 °C overnight.

[0033] (5) Dissolve 200 mg of the product in (2) in 30 mL of methanol, take 10 mg of the product in (4) and disperse it in 10 mL of ultrapure wat...

Embodiment 2

[0036] (1) Take 0.539g Zn(NO 3 ) 2 and 3.234g of 2-Im were respectively dissolved in 40mL of methanol, and ultrasonically stirred for 30min. It was centrifuged for 15 min, washed with methanol three times and filtered, and the obtained powder was vacuum-dried in an oven at 85°C.

[0037] (2) Dissolve 0.1 g of the product obtained in (1) in 20 mL of methanol, and add 0.1 mL of APTES. The reaction was refluxed at 70°C for 5h. After cooling, the product was washed several times with dichloromethane and dried.

[0038] (3) Disperse 150 mg of graphene oxide in 150 mL of distilled water, add 1.5 mL of APTES, first ultrasonically stir for 30 min, and then mechanically stir for 24 h.

[0039] (4) The product of step (3) was washed with deionized water and centrifuged for 15 min to obtain sediment, and finally dried at 60 °C overnight.

[0040] (5) Dissolve 100 mg of the product in (2) in 20 mL of methanol, take 5 mg of the product in (4) and disperse it in 10 mL of ultrapure wate...

Embodiment 3

[0043] (1) Take 0.539g Zn(NO 3 ) 2and 3.773g of 2-Im were respectively dissolved in 40mL of methanol, and ultrasonically stirred for 30min. It was centrifuged for 15 min, washed with methanol three times and filtered, and the obtained powder was vacuum-dried in an oven at 85°C.

[0044] (2) Dissolve 0.3 g of the product obtained in (1) in 40 mL of methanol, and add 0.2 mL of APTES. The reaction was refluxed at 70°C for 5h. After cooling, the product was washed several times with dichloromethane and dried.

[0045] (3) Disperse 300 mg of graphene oxide in 200 mL of distilled water, add 1.5 mL of APTES, first ultrasonically stir for 30 min, and then mechanically stir for 24 h.

[0046] (4) The product of step (3) was washed with deionized water and centrifuged for 15 min to obtain sediment, and finally dried at 60 °C overnight.

[0047] (5) Dissolve 200 mg of the product in (2) in 20 mL of methanol, take 15 mg of the product in (4) and disperse it in 20 mL of ultrapure wate...

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Abstract

The invention provides a preparation method of a ZIF-8 nano-material / graphene oxide (GO) composite membrane which is subjected to amino-functionalization modification by using 3-aminopropyltriethoxysilane (APTES), as well as an application of adsorption on copper ions in water. The invention belongs to the technical field of material preparation and analysis and detection. In the method, Zn(NO3)2and 2-methylimidazole (2-Im) are used for preparing a ZIF-8 nano-material; then the ZIF-8 nano-material is modified by the APTES to enhance the capability of adsorbing heavy metal ions; then the GO isdissolved in distilled water and is modified by the APTES; the two modified components are subjected to mixing reflux reaction for 24 h; finally, the product is cooled and is subjected to vacuum suction filtration to form the membrane.

Description

technical field [0001] The invention relates to a preparation method of a ZIF-8 metal-organic framework material composite film supported on graphene oxide (GO), in particular to an f-ZIF-8 which has an adsorption effect on copper ions in a solution after being modified by an amine function. The invention relates to a preparation method of 8 / GO composite membrane and its application in detecting copper ions in water, belonging to the technical field of material preparation and detection. Background technique [0002] Heavy metal pollution in water is one of the types of pollution that seriously threatens human health and even life safety. Among them, copper in the form of divalent ions in water is the main source of pollution. The high concentration of copper ions in the water environment mainly comes from the chemical industry, printing and dyeing, electroplating, non-ferrous metal mining and smelting industries. Copper ions cannot be biodegraded after entering the water ...

Claims

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Application Information

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IPC IPC(8): B01J20/22B01J20/28B01J20/30B01D69/12B01D67/00C02F1/28C02F1/44C02F101/20
CPCB01D67/0079B01D69/12B01J20/20B01J20/22B01J20/226B01J20/28033B01J20/28038B01J2220/46B01J2220/4806B01J2220/4812C02F1/281C02F1/283C02F1/285C02F1/44C02F2101/20
Inventor 欧红香卫宁郑旭东余沛霖叶青李桥
Owner CHANGZHOU UNIV
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