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Surface modified metal-organic framework compound, and preparation method and application thereof

A metal-organic framework and surface modification technology, which is applied in the direction of alkali metal compounds, alkali metal oxides/hydroxides, and separation methods, can solve problems such as poor water stability, and achieve reduced adhesion, good application prospects, and excellent water quality. The effect of thermal stability

Active Publication Date: 2019-01-11
LIAONING UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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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  • Surface modified metal-organic framework compound, and preparation method and application thereof
  • Surface modified metal-organic framework compound, and preparation method and application thereof
  • Surface modified metal-organic framework compound, and preparation method and application thereof

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 a preparation method and an application thereof. The surface modified metal-organic framework compound is a metal-organic framework compound with a superhydrophobic surface, obtained by chemically modifying and connecting the outer surface of crystals of a metal-organic framework material with a functional hydrophobic group by a surface modification process. The hydrophilic metal-organic framework material is successfully modified into the superhydrophobic metal-organic framework material, and the modified metal-organic framework material has the advantages of fast oil absorption, large adsorption amount, high cycle number and the like; and more importantly, the preparation method has the advantages of fastness, easiness in operation, and cheap raw materials. The surface modified metal-organic framework compound has excellent application prospects in the fields of 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 Applications(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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