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Preparation method and application of magnetic metal organic framework material

A metal-organic framework and organic framework technology, which is applied in the preparation of test samples, alkali metal compounds, chemical instruments and methods, etc., can solve the problems of cumbersome pretreatment steps, a large amount of organic solvents, long analysis time, etc. Intact, simple synthesis method, and simple synthesis process

Pending Publication Date: 2022-03-08
TIANJIN UNIV OF SCI & TECH +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, common methods for removing pollutants in drinking water include coagulation-flocculation, adsorption, chlorination, electrochemical oxidation, ozonation, and photocatalytic oxidation. Handling steps, long analysis times, expensive, and use of large amounts of organic solvents

Method used

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  • Preparation method and application of magnetic metal organic framework material
  • Preparation method and application of magnetic metal organic framework material
  • Preparation method and application of magnetic metal organic framework material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] A preparation method and application of a magnetic metal-organic framework material, comprising the steps of:

[0033] (1) Preparation of ferric iron tetroxide Fe by means of solvothermal method 3 o 4 Magnetic nanoparticles and functionalized with citric acid;

[0034] Accurately weigh 3.24g FeCl 3 ·6H 2O was dissolved in 80mL of ethylene glycol, stirred vigorously for 30min to completely dissolve until clear and transparent. Subsequently, 4.8 g of anhydrous sodium acetate and 0.8 g of sodium citrate were added thereto under vigorous stirring, and an orange solution was obtained after thorough stirring, which was then transferred to a hydrothermal reaction kettle and reacted at 200° C. for 8 h, the product Citric acid-functionalized iron oxide Fe was obtained by washing five times with absolute ethanol 3 o 4 magnetic nanoparticles.

[0035] (2) Fe functionalized in citric acid 3 o 4 Magnetic nanoparticles coated with MIL-100(Fe) metal-organic framework to obtai...

Embodiment 2

[0040] A method for preparing a magnetic metal-organic framework material and its application, the steps and method are basically the same as in Example 1, except that the sample solution to be tested used is a sulfonamide veterinary drug.

Embodiment 3

[0042] A method for preparing a magnetic metal-organic framework material and its application, the steps and method are basically the same as in Example 1, except that the sample solution to be tested is a biotoxin.

[0043] figure 1 It is the scanning electron micrograph and transmission electron micrograph of the magnetic metal organic framework composite material, which shows that the prepared framework material has a good core-shell structure, and the particle size is uniform, and the size is about 150nm, which is suitable as an adsorption material.

[0044] figure 2 It is the characterization of the element composition of the magnetic metal-organic framework composites, indicating that the prepared nanomaterials mainly contain three elements of Fe, C and O, and the synthesis does not require too many organic chemical reagents, which is in line with the concept of green chemistry.

[0045] image 3 The crystal structure characterization of magnetic metal-organic framewo...

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Abstract

The invention relates to a preparation method and application of a magnetic metal organic framework material. The preparation method comprises the following steps: (a) preparing ferroferric oxide Fe3O4 magnetic nanoparticles by virtue of a solvothermal method, and carrying out surface citric acid functionalization; and (b) coating the surfaces of the citric acid functionalized Fe3O4 magnetic nanoparticles with an MIL-100 (Fe) metal organic framework to obtain the Fe3O4-coated MIL-100 (Fe) composite material, and applying the Fe3O4-coated MIL-100 (Fe) composite material to enrichment detection of pollutants in drinking water. The preparation method has the beneficial effects that the magnetic metal organic framework composite material is successfully prepared, the synthesis method is simple, and the nano composite material is intact in morphology and uniform in size, has a good core-shell structure and a relatively large specific surface area, and is suitable for industrial production. The magnetic solid-phase extraction method can be applied to rapid and convenient enrichment detection of pollutants in drinking water.

Description

technical field [0001] The invention belongs to the research field of enrichment detection of pollutants in drinking water, and relates to a preparation method of a magnetic metal organic framework material and its sample pretreatment application. Background technique [0002] With the continuous progress and development of science and technology, the safety of food and drinking water has attracted more and more attention. At present, the pollutants in drinking water are generally chemical substances of synthetic or natural origin, and the continuous and long-term exposure of these pollutants will cause adverse effects on the ecological environment and human health. These pollutants come from many different sources, including pesticides, veterinary drugs, industrial by-products, food additives, and engineering materials. Under normal conditions, the pollutants in drinking water are relatively stable and difficult to decompose. Even after being treated in a water treatment p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/22B01J20/28B01J20/30C02F1/28G01N1/28G01N21/33
CPCB01J20/226B01J20/28009B01J20/28021B01J20/06C02F1/288G01N1/28G01N21/33
Inventor 邵兵刘青润
Owner TIANJIN UNIV OF SCI & TECH
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