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Preparation method and application of super-hydrophobic zeolite imidazole metal-organic framework F-ZIF-90

A metal-organic framework, F-ZIF-90 technology, applied in the field of material chemistry, can solve the problem of poor oil-water separation performance and achieve excellent hydrophobic performance

Inactive Publication Date: 2017-01-11
EAST CHINA NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, there are hydrophilic aldehyde functional groups in the framework of ZIF-90, and the water contact angle is only about 90°, which makes its oil-water separation performance poor.

Method used

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  • Preparation method and application of super-hydrophobic zeolite imidazole metal-organic framework F-ZIF-90
  • Preparation method and application of super-hydrophobic zeolite imidazole metal-organic framework F-ZIF-90
  • Preparation method and application of super-hydrophobic zeolite imidazole metal-organic framework F-ZIF-90

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Step 1: Organic Ligand Modification

[0025] Dissolve 0.388 g (4 mmol) of imidazole-2-carbaldehyde and 0.732 g (4 mmol) of 2,3,4,5,6-pentafluoroaniline in 20 ml of absolute ethanol, and transfer to a 250 ml single-necked flask after the solution is clarified 0.0088 g (0.0472 mmol) p-toluenesulfonic acid was added, and the reaction was refluxed at 80°C for 12 hours. After the reaction was completed, the solvent was removed by rotary evaporation, and then washed several times with anhydrous methanol to remove the methanol to obtain the organic ligand fluorine-functionalizedimidazole (F-ICA) with a hydrophobic group;

[0026] Step 2: Preparation of superhydrophobic F-ZIF-90

[0027] Dissolve 1.0452 g (4 mmol) of imidazole fluoride and 0.136 g (2 mmol) of sodium formate in 30 mL of anhydrous methanol, and stir the solution magnetically until clear to prepare solution A; 0.136 g (1 mmol) of anhydrous ZnCl 2 Dissolve in 10 mL of anhydrous methanol to prepare solution B; slo...

Embodiment 2

[0030] Step 1: Organic Ligand Modification

[0031] Dissolve 0.388 g (4 mmol) of imidazole-2-carbaldehyde and 0.0.8235 g (4.5 mmol) of 2,3,4,5,6-pentafluoroaniline in 20 ml of absolute ethanol, and transfer to 250 0.0088 g (0.0472 mmol) p-toluenesulfonic acid was added to a single-necked flask, and the reaction was refluxed at 75 °C for 24 hours. After the reaction was completed, the solvent was removed by rotary evaporation, and then washed several times with anhydrous methanol to remove the methanol to obtain the organic ligand fluorine-functionalized imidazole (F-ICA) with a hydrophobic group;

[0032] Step 2: Preparation of superhydrophobic F-ZIF-90

[0033]1.3065 g (5 mmol) of imidazole fluoride and 0.136 g (2 mmol) of sodium formate were dissolved in 30 mL of anhydrous methanol, and the solution was magnetically stirred until clear to prepare solution A; 0.297 g (1 mmol) of Zn(NO 3 ) 2 ·6H 2 O was dissolved in 10 mL of anhydrous methanol to prepare solution B; the cl...

Embodiment 3

[0035] Step 1: Organic Ligand Modification

[0036] Dissolve 0.388 g (4 mmol) of imidazole-2-carbaldehyde and 0.0.8235 g (4.5 mmol) of 2,3,4,5,6-pentafluoroaniline in 20 ml of absolute ethanol, and transfer to 250 0.0088 g (0.0472 mmol) p-toluenesulfonic acid was added to a single-necked flask, and the reaction was refluxed at 60 °C for 30 hours. After the reaction was completed, the solvent was removed by rotary evaporation, and then washed several times with anhydrous methanol to remove the methanol to obtain the organic ligand fluorine-functionalized imidazole (F-ICA) with a hydrophobic group;

[0037] Step 2: Preparation of superhydrophobic F-ZIF-90

[0038] Dissolve 1.0425 g (4 mmol) of imidazole fluoride and 0.219 g (2 mmol) of sodium formate in 30 mL of anhydrous methanol, and stir the solution magnetically until clear to prepare solution A; 0.136 g (1 mmol) of Zn(Ac) 2 2H 2 O was dissolved in 10 mL of anhydrous methanol to prepare solution B; the clear solution A wa...

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Abstract

The invention discloses a preparation method and application of a super-hydrophobic zeolite imidazole metal-organic framework F-ZIF-90. The preparation method comprises the following steps: first, performing covalent bond modification on an organic ligand imidazole-2-formaldehyde (ICA) for synthesizing ZIF-90 through an amine condensation reaction to obtain fluorine-functionalized imidazole-2-formaldehyde (F-ICA); then, preparing the zeolite imidazole metal-organic framework F-ZIF-90 with a super-hydrophobic property by using the F-ICA. According to the novel super-hydrophobic zeolite imidazole metal-organic framework F-ZIF-90 prepared by the preparation method, on one hand, the micro-morphology and structure and the crystal structure of the zeolite imidazole metal-organic framework F-ZIF-90 are maintained, the hydrothermal stability and the specific surface are high; on the other hand, the hydrophobic property of the ZIF-90 is greatly improved (the water contact angle is up to 159.1 degrees), and the super-hydrophobic zeolite imidazole metal-organic framework F-ZIF-90 has a broad application prospect in a plurality of fields, such as oil water separation, removal of organic pollutants from a water body, biological alcohol extraction and concentration.

Description

technical field [0001] The invention belongs to the field of material chemistry, and in particular relates to a preparation method of a zeolite imidazole metal-organic framework F-ZIF-90 with superhydrophobic properties. Background technique [0002] At present, water pollution, especially oil-polluted water incidents occur frequently, mainly including oil exploitation, oil spills, and food, textile, mechanical processing, leather and other industries producing or discharging a large amount of oil-polluted water to the environment. The environment that human beings rely on for survival poses long-term serious threats. How to achieve effective oil-water separation has become an urgent problem to be solved. Based on the principle of similar polarity and similar compatibility, many organic-hydrophobic porous materials have been developed to solve the problem of oil-polluted water, especially the problem of oil spills during marine transportation and exploitation. The lipophili...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07F3/06B01J20/22B01J20/30C02F1/28C02F1/40C02F101/30
CPCB01J20/226C02F1/285C02F1/40C02F2101/30C07F3/003C07F3/06
Inventor 黄爱生
Owner EAST CHINA NORMAL UNIV
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