A kind of surface-modified metal-organic framework composite and its preparation method and application

A metal-organic framework and surface modification technology, which is applied in alkali metal compounds, alkali metal oxides/hydroxides, separation methods, etc., can solve problems such as poor water stability, achieve less adhesion, good channel performance, and low price Effect

Active Publication Date: 2021-03-05
LIAONING UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the sensitivity of the coordination bonds to water, most of these materials suffer from poor water stability.

Method used

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  • A kind of surface-modified metal-organic framework composite and its preparation method and application
  • A kind of surface-modified metal-organic framework composite and its preparation method and application
  • A kind of surface-modified metal-organic framework composite and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] Embodiment 1 Based on octadecylamine (OA) surface-modified metal-organic framework composite

[0043] (1) Metal-organic framework composite (ZIF-67-OA composite) based on surface modification of octadecylamine

[0044] 1. Preparation of metal organic framework material ZIF-67

[0045] ZIF-67 was prepared by room temperature solvothermal method. First, weigh 0.5g Co(NO 3 )2 ·6H 2 Dissolve O in 3mL ultrapure water to obtain solution A; weigh 5g of dimethylimidazole and dissolve it in 50mL of anhydrous methanol to obtain solution B after dissolving. After the above two reaction precursors were completely dissolved, solution A was quickly poured into solution B under vigorous stirring to obtain a purple mixed solution, and then the mixed solution was magnetically stirred at room temperature for 24 h. After the obtained purple precipitate was separated by centrifugation, it was washed several times with absolute ethanol, and then vacuum-dried at 70°C overnight to obtain ...

Embodiment 2

[0066] The application of the metal-organic framework compound of embodiment 2 surface modification

[0067] (1) Chemical stability test

[0068] In order to investigate the chemical stability of the metal-organic framework compound modified based on octadecylamine, the obtained metal-organic framework compound modified based on octadecylamine was treated in different organic solvents. The specific process is: take 20 mg of the ZIF-67-OA complex, HKUST-1-OA complex and UiO-66-OA complex prepared in Example 1 and soak them in 10 mL of water and ethyl acetate; EA), toluene (Toluene), petroleum (Petroleumether; PE), n-hexane (n-hexane; Hex), (TCM chemical name) (TCM), (DCM chemical name) (DCM), ethanol (EtOH) and methanol ( MeOH), soaking at room temperature for 24h, and using infrared spectroscopy and PXRD to monitor the soaked composite.

[0069] 1. The PXRD of the metal-organic framework composite based on the surface modification of octadecylamine after soaking is as follow...

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Abstract

The invention relates to a surface-modified metal-organic framework compound and its preparation method and application. It is a surface super-hydrophobic metal-organic framework composite obtained by chemically modifying functional hydrophobic groups to the crystal surface of metal-organic framework materials through surface modification. Successfully modified hydrophilic metal-organic framework materials into super-hydrophobic metal-organic framework materials, and the modified metal-organic framework materials exhibited the advantages of fast oil absorption, large adsorption capacity, and high cycle times, and more importantly, this preparation method , fast, easy to operate, cheap raw materials. Therefore, it has a good application prospect in the future sewage treatment and oil-water separation.

Description

technical field [0001] The invention belongs to the technical field of functional materials, and in particular relates to a surface-modified, specifically superhydrophobic / superlipophilic metal-organic framework compound and its preparation method and application. Background technique [0002] In the past few years, due to the exploitation, processing, transportation of crude oil and the extensive use of various refined oils, the water body has been seriously polluted, the living environment has been deteriorated, and human health has been endangered. Therefore, with the shortage of water resources and the aggravation of pollution, the comprehensive treatment of oily wastewater has become a topic that urgently needs to be explored and studied. [0003] Surface modification is to modify functional (superhydrophobic, superlipophilic, amphiphilic, etc.) small molecules or polymers on the surface of two-dimensional or three-dimensional carrier materials, thereby preparing surfac...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/22B01J20/28B01J20/30C02F1/40B01D17/022
CPCB01D17/0202B01J20/22B01J20/226B01J20/28011C02F1/40
Inventor 韩正波高明亮
Owner LIAONING UNIVERSITY
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