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Magnetic nanoparticles and preparation method thereof

A magnetic nanoparticle and nanoparticle technology, applied in the chemical field, can solve the problems of magnetic materials to be studied, and achieve the effects of superior chemical and thermal stability, fast speed, and high specific surface area

Active Publication Date: 2021-08-20
CHINESE ACAD OF INSPECTION & QUARANTINE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Therefore, magnetic materials for enrichment of zearalenone mycotoxins need to be studied

Method used

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  • Magnetic nanoparticles and preparation method thereof
  • Magnetic nanoparticles and preparation method thereof
  • Magnetic nanoparticles and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0074] According to the method of the embodiment of the present invention, the carboxyl-functionalized ferric iron tetroxide is used as the magnetic core, 1,3,5-tris(4-aminophenyl)benzene and 1,3,5-triformylphloroglucinol To synthesize magnetic nanoparticles for functional monomers, the preparation process is as follows:

[0075] (a) In a 50mL two-necked round-bottomed flask, 50mg of carboxy-functionalized ferric oxide and 80mg of 1,3,5-tris(4-aminophenyl)benzene were added to 11mL of tetrahydrofuran, and Sonicate for 20min.

[0076] (b) With the product of step (a), the mixture was mechanically stirred at 65°C for 30 minutes, so that part of 1,3,5-tris(4-aminophenyl)benzene was first anchored to the carboxyl-functionalized tetroxide through hydrogen bonds. The tri-iron surface forms a bridge effect to obtain covalent organic framework nanomaterials.

[0077] (c) Disperse 60 mg of 1,3,5-triformylphloroglucinol evenly in 4 mL of tetrahydrofuran, and add it and 200 μL of aceti...

Embodiment 2

[0079] The magnetic nanoparticles (Fe) that this embodiment obtains to embodiment 1 3 o 4 @TAPB-Tp) conducted detailed characterization experiments to demonstrate the successful preparation and excellent physicochemical properties of magnetic nanoparticles. details as follows:

[0080] 1. Carboxyl-functionalized ferric oxide (Fe 3 o 4 ) and magnetic nanoparticles (Fe3 o 4 @TAPB-Tp) for scanning electron microscopy, transmission electron microscopy, and energy dispersive spectroscopy. The result is as figure 1 As shown, from Fe 3 o 4 ( figure 1 A) and Fe 3 o 4 @TAPB-Tp( figure 1 B) The SEM image shows that the prepared Fe 3 o 4 and Fe 3 o 4 @TAPB-Tp has regular spherical morphology and good dispersion. compared to Fe 3 o 4 , Fe 3 o 4 The surface morphology of @TAPB-Tp changed significantly, indicating that the covalent organic framework shell was successfully encapsulated in Fe 3 o 4 surface. Fe 3 o 4 The TEM image of @TAPB-Tp further proves that the co...

Embodiment 3

[0089] In this embodiment, the magnetic nanoparticles (Fe 3 o 4 @TAPB-Tp) studied its feasibility for the adsorption of five zearalenone mycotoxins (ZEAs) in complex samples as follows:

[0090] Fe was studied by adsorption static adsorption and dynamic adsorption experiments 3 o 4 Adsorption performance of @TAPB-Tp on five ZEAs. In short, prepare 2mL standard solutions of each target substance with a concentration of 2mg / L, 5mg / L, 10mg / L, 20mg / L, 30mg / L, 40mg / L, and 50mg / L, and add 1.0mg of Fe 3 o 4 @TAPB-Tp oscillating adsorption for 120min and configuration 2mL concentration is 0.005mg / L, 0.05mg / L, 0.1mg / L, 0.25mg / L, 0.5mg / L, 1mg / L, 1.25mg / L, 1.5mg / L , 2mg / L standard solution of each target substance, respectively add 0.50mg of Fe 3 o 4 @TAPB-Tp was shaken and adsorbed for 120min. Calculate Fe by the following formula (1) 3 o 4 Maximum adsorption capacity of @TAPB-Tp for five ZEAs.

[0091]

[0092] Among them, Q is the maximum adsorption capacity, C 0 is the...

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Abstract

The invention discloses a magnetic nanoparticle and a preparation method thereof. The magnetic nanoparticle comprises: a core body which is composed of superparamagnetic ferroferric oxide; and a shell covering the surface of the core body, wherein the shell is composed of a repeating unit as shown in a formula I which is described in the specification. The magnetic nanoparticles have excellent chemical and thermal stability, and are large in specific surface area, high in adsorption capacity and high in adsorption speed.

Description

technical field [0001] The invention relates to the field of chemistry, in particular to magnetic nanoparticles and a preparation method thereof. Background technique [0002] Magnetic solid-phase microextraction is a sample pretreatment method with great potential. It has won widespread attention due to its advantages such as simple operation, less solvent consumption, and large adsorption capacity. Magnetic solid-phase microextraction has been successfully applied to the adsorption and enrichment of organic pollutants at trace / ultra-trace levels in complex samples. The performance of magnetic adsorption materials is a key factor affecting the sensitivity and selectivity of magnetic solid-phase microextraction methods. At present, common magnetic adsorption materials mainly include inorganic coated magnetic materials, organic small molecule grafted magnetic materials, and supported magnetic materials such as carbon nanomaterials, molecularly imprinted polymers, or metal or...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/22B01J20/30B01J20/28B01D15/08G01N1/34G01N23/207G01N21/35
CPCB01J20/06B01J20/226B01J20/28009B01J20/28004B01D15/08G01N1/34G01N23/207G01N21/35B01J2220/4806B01J2220/4812B01J2220/46G01N2021/3595Y02P60/87
Inventor 王秀娟张峰刘通王友法李银龙母国栋
Owner CHINESE ACAD OF INSPECTION & QUARANTINE
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