Preparation and applications of magnetic composite porous network adsorbing material

A porous network and adsorption material technology, which is applied in the field of preparation of magnetic composite porous network adsorption materials, can solve the problems of limited application and poor surface hydrophobicity, and achieve simplified pretreatment steps, high-efficiency adsorption capacity, good particle size uniformity and stability sexual effect

Active Publication Date: 2019-12-20
NANKAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the surface hydrophobicity of a single porous adsorption material is poor, which greatly limits its application in organic environments.

Method used

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  • Preparation and applications of magnetic composite porous network adsorbing material
  • Preparation and applications of magnetic composite porous network adsorbing material
  • Preparation and applications of magnetic composite porous network adsorbing material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Preparation of a magnetic composite porous network adsorption material

[0037] (1) The in situ growth method is used to prepare magnetic porous organic framework materials with strong adsorption and large specific surface area.

[0038] Magnetic Fe 3 o 4 Preparation: 27g FeCl 3 ·6H 2 O. 57.5g of anhydrous sodium acetate and 500mL of ethylene glycol were mixed and stirred for 60 minutes, then transferred to a Teflon-lined hydrothermal reactor and heated at 200°C for 8 hours. After the reaction was completed and cooled to room temperature, it was washed 4 times with ultrapure water. Then vacuum-dried at 60° C. for 12 hours to collect a black magnetic powder product.

[0039] Magnetic Fe 3 o 4 @SiO 2 Preparation: Take 1.0g of the magnetic Fe obtained in the previous step 3 o 4 , add 200mL HCl (0.1mol / L), sonicate for 10min, and then rinse with ultrapure water for 3 times. Add 80mL ultrapure water, 320mL ethanol, 5mL ammonia water (25-28%), and sonicate for 10mi...

Embodiment 2

[0043] The material obtained in Example 1 was placed in the aflatoxin B1 solution, and after being adsorbed by shaking, it was separated with a magnet to realize the enrichment of the aflatoxin B1. Quantitative detection can be carried out in combination with high performance liquid chromatography.

Embodiment 3

[0045] The material obtained in Example 1 was placed in the aflatoxin B2 solution, and after being adsorbed by shaking, it was separated with a magnet to realize the enrichment of the aflatoxin B2. Quantitative detection can be carried out in combination with high performance liquid chromatography.

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Abstract

The invention relates to preparation and applications of a magnetic composite porous network adsorbing material, wherein the preparation method comprises: (a) preparing a magnetic porous organic framework material with strong adsorbability and large specific surface area by adopting an in-situ growth method, and (b) synthesizing a novel composite porous network adsorbing material with a core-shellstructure through a sonogashira coupling reaction so as to achieve the selective adsorption and efficient enrichment of food and environment pollutants. According to the present invention, the prepared magnetic composite porous network adsorbing material has good particle size uniformity and significantly efficient adsorption capacity on target pollutants, the separation step during solid-phase extraction is greatly simplified due to the magnetic characteristic of the material, and the microporous organic coating changes the hydrophobicity of the surface of the material, such that the material has high stability in a humid environment, can well play a role in an organic solvent, and is suitable for adsorption and enrichment of various food pollutants.

Description

technical field [0001] The invention belongs to the research field of porous network adsorption materials, and relates to a preparation method and application of magnetic composite porous network adsorption materials. Background technique [0002] In recent years, with the increasing improvement of people's material living standards, the issue of food safety has increasingly become an issue of widespread concern in our society. Food safety is an interdisciplinary field that discusses ensuring food hygiene and food safety during food processing, storage, and sales, reducing hidden dangers of disease, and preventing food poisoning. [0003] With the advent of various chemical technologies and products, coupled with the influence of various factors such as food processing, production, circulation and operating conditions, more food safety problems have emerged in my country, such as microbial hazards, heavy metal pollution, pesticide and veterinary drug residues, additives, etc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/28B01J20/22B01J20/30G01N33/02
CPCB01J20/226B01J20/28009B01J20/28054B01J20/28057G01N33/02
Inventor 刘敬民王硕
Owner NANKAI UNIV
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