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Preparation method and application of magnetic covalent organic framework material

A covalent organic framework and magnetic technology, applied in the direction of material separation, analytical materials, chemical instruments and methods, etc., can solve the problem of low content, achieve the effect of good reproducibility, wide application range, and large specific surface area

Inactive Publication Date: 2020-01-10
NANKAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The dual factors of extremely low content and complex matrix pose a high challenge to sample pretreatment and separation analysis

Method used

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

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

[0033] (1) Preparation of ferric iron tetroxide Fe by means of solvothermal method 3 o 4 Magnetic nanoparticles and surface activation;

[0034] Iron Tetroxide Fe 3 o 4 Preparation of magnetic nanoparticles: Accurately weigh 1g FeCl 3 ·6H 2 O was dissolved in 30mL of ethylene glycol, and 2g of anhydrous sodium acetate and 5mL of 1,6-hexamethylenediamine were added to it under stirring conditions, and a transparent solution was obtained after thorough stirring. Then transferred to a hydrothermal reaction kettle, reacted at 190°C for 6h, and the product was washed three times with absolute ethanol to obtain ferric iron tetroxide Fe 3 o 4 magnetic nanoparticles;

[0035] Iron Tetroxide Fe 3 o 4 Surface activation of magnetic nanoparticles: the obtained 25mg iron tetraoxide Fe 3 o 4 Magnetic nanoparticles and 1mmol 2,4,6-trihydroxy-1,3,5-benz...

Embodiment 2

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

Embodiment 3

[0042] A method for preparing a magnetic covalent 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.

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Abstract

The invention relates to a preparation method and application of a magnetic covalent organic framework material. The preparation method comprises the following steps: (a) preparing ferroferric oxide Fe3O4 magnetic nanoparticles by using solvothermal method and carrying out surface activation; and (b) coating the surfaces of the Fe3O4 magnetic nanoparticles with a TpBD covalent organic framework toobtain a Fe3O4@TpBD composite material, and applying the Fe3O4@TpBD composite material to enrichment detection of food hazard factors. The beneficial effects of the invention are that: the magnetic covalent organic framework material is successfully prepared, the synthesis method is simple, and the nano composite material is uniform in morphology and size, has a large specific surface area and aporous structure, and can be applied to enrichment detection of various food hazard factors such as food packaging material processing aids, sulfonamides and veterinary drugs, biotoxins and endocrinedisruptors.

Description

technical field [0001] The invention belongs to the research field of enrichment detection of food hazard factors, and relates to a preparation method of a magnetic covalent organic framework material and its sample pretreatment application. Background technique [0002] With the rapid development of modern industry, while bringing great convenience to people's life, it also brings a lot of negative effects to people's life. Industrial production will produce a lot of chemical pollutants, and these chemical pollutants can come into full contact with environmental organisms including humans through various environmental media such as air, soil, water, food, etc. Whether these chemical pollutants will cause harm to the health of humans and other organisms by interfering with the endocrine system of organisms has aroused great concern from international endocrinologists, toxicologists, and ecologists. , its harm to the ecological environment of the earth and the survival and h...

Claims

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Application Information

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IPC IPC(8): B01J20/28B01J20/22B01J20/30B01D15/08G01N30/08
CPCB01D15/08B01J20/06B01J20/226B01J20/28009G01N30/08
Inventor 刘敬民王硕
Owner NANKAI UNIV
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