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Method for preparing novel magnetic fluorescent nanometer composite material

A magnetic nanometer, a certain amount of technology, applied in the direction of magnetic materials, luminescent materials, magnetic objects, etc., can solve the problems of lengthy multi-step reactions, affecting the practical application of magnetic nanoparticles, complex synthesis steps, etc.

Active Publication Date: 2018-04-27
BEIJING INSTITUTE OF TECHNOLOGYGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the various methods for surface modification of magnetic nanoparticles mentioned above often require complex and lengthy multi-step reactions on the surface of magnetic nanoparticles.
The magnetic nanoparticles modified by these methods often have low magnetic saturation and saturation magnetic intensity, and require complex synthesis steps and high temperature operations, resulting in serious nano-agglomeration, which seriously affects the practical application of magnetic nanoparticles.

Method used

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  • Method for preparing novel magnetic fluorescent nanometer composite material
  • Method for preparing novel magnetic fluorescent nanometer composite material
  • Method for preparing novel magnetic fluorescent nanometer composite material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Synthesis of magnetic fluorescent nanocomposites of carboxyl-modified magnetic nanomaterials and amino-modified ZnS quantum dots:

[0033] 1) Take 1.95g FeCl 3 , 0.6g trisodium citrate, 60mL ethylene glycol, put into the beaker; ultrasonically dissolve, and start stirring, during the stirring process, slowly add 3.6g anhydrous sodium acetate; put the above product into the reaction kettle, at 200 degrees Celsius After heating in the oven for 12 hours, cool to room temperature; put the obtained product in the refrigerator for 20 minutes, put the product in a centrifuge tube for 4 to 5 hours in vacuum freeze-drying, and then store it at 4 degrees Celsius;

[0034] 2) Take 1.797g of ZnSO 4 ·7H 2 O and 98.955 mg of MnCl 2 4H 2O, and 20mL of deionized water were added successively in a 50mL three-necked flask, and the mixture was stirred at room temperature for 30 minutes under nitrogen protection;

[0035] 3) 1.801g of Na 2 S·4H 2 O (dissolved in 5 mL of water) was s...

Embodiment 2

[0040] Synthesis of magnetic fluorescent nanocomposites of carboxyl-modified magnetic nanomaterials and amino-modified ZnS quantum dots:

[0041] 1) Take 1g FeCl 3 , 0.2g trisodium citrate, and 60mL ethylene glycol were added to the beaker; the above-mentioned mixed solution was dissolved by ultrasonic waves, and stirring was started. During the stirring process, 2g of anhydrous sodium acetate was slowly added; the above-mentioned product was put into the reaction kettle, and After heating in an oven at 200 degrees Celsius for 12 hours, cool to room temperature; freeze the product in the refrigerator for 20 minutes, then place the product in a centrifuge tube for 4 to 5 hours in vacuum freeze-drying, and then store it at 4 degrees Celsius;

[0042] 2) Take 1.152g of ZnSO 4 ·7H 2 O and 39.42 mg of MnCl 2 4H 2 O, and 20mL of deionized water were added successively in a 50mL three-necked flask, and the mixture was stirred at room temperature for 30 minutes under nitrogen prot...

Embodiment 3

[0048] Synthesis of magnetic fluorescent nanocomposites of carboxyl-modified magnetic nanomaterials and amino-modified ZnS quantum dots:

[0049] 1) Take 3g FeCl 3 , 1.5g trisodium citrate, and 60mL ethylene glycol were added to the beaker; the above-mentioned mixed solution was dissolved by ultrasonic waves, and stirring was started. During the stirring process, 5g of anhydrous sodium acetate was slowly added; Heating in an oven at 200 degrees Celsius for 12 hours, cooling to room temperature; freezing the product in the refrigerator for 20 minutes, placing the product in a centrifuge tube for 4 to 5 hours in vacuum freeze-drying, and then storing it at 4 degrees Celsius;

[0050] 2) Take 2.304g of ZnSO 4 ·7H 2 O and 197.1 mg of MnCl 2 4H 2 O, and 20mL of deionized water were added successively in a 50mL three-necked flask, and the mixture was stirred at room temperature for 30 minutes under nitrogen protection;

[0051] 3) Add 2.4g of Na 2 S·4H 2 O (dissolved in 5 mL ...

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Abstract

The invention relates to a method for preparing a novel magnetic fluorescent nanometer composite material and belongs to the field of material chemistry and inorganic synthesis. The method combines magnetic particles and quantum dots and prepares the nanometer composite material with strong magnetic induction effects and high fluorescence performances. The magnetic fluorescent nanometer compositematerial can realize fast separation in a magnetic field and high-intensity fluorescence emission under light excitation. In the magnetic field, the nanometer composite material can be fast adsorbed by magnetic. The nanometer composite material can be fast redispersed after the magnetic field is eliminated. The method has the advantages of simple synthesis processes, high yield, uniform nanoparticle, small particle size and wide application, and has a great potential application value in medical detection, biological sensing, food analysis and environmental protection.

Description

technical field [0001] The invention relates to a method for preparing a magnetic fluorescent nanocomposite material. Specifically, the magnetic fluorescent nanocomposite material is a new type of functional material and belongs to the technical field of inorganic synthesis. Background technique [0002] Magnetic fluorescent nanocomposites, as a new type of functional material, have both the superparamagnetism of magnetic nanomaterials and the optical properties of quantum dot materials. [0003] In recent years, new nanomaterials, including quantum dots, mesoporous materials, carbon nanotubes, and magnetic nanoparticles, have been widely used in the fields of biology, chemistry, medicine, and the environment. Among them, due to their unique physical and chemical properties, magnetic nanomaterials have become a research hotspot in many fields. Magnetic nanoparticles are a new type of soft magnetic nano-functional material with a cubic inverse spinel structure, the unit cell...

Claims

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Application Information

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IPC IPC(8): C09K11/06B82Y20/00B82Y30/00H01F1/01
CPCB82Y20/00B82Y30/00C09K11/06H01F1/0045H01F1/01
Inventor 罗爱芹陈炜杰张鑫
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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