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Method for preparing functionalized carbon-coated magnetic nanoparticles

A magnetic nanoparticle, carbon coating technology, applied in the fields of magnetic materials, nanotechnology, nanotechnology, etc., can solve the problems of poor product size uniformity, complex synthesis method, glued together, etc., to achieve good stability and simple process. , the effect of response time

Active Publication Date: 2016-11-16
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The above synthetic carbon-coated Fe 3 o 4 There are generally some shortcomings in the method of materials: the synthesis method is relatively complicated, and the product is often synthesized through a variety of reagents or multi-step reactions, and the product has poor size uniformity and shape, and the carbon coated on the surface will stick together. makes Fe 3 o 4 reunion phenomenon

Method used

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  • Method for preparing functionalized carbon-coated magnetic nanoparticles
  • Method for preparing functionalized carbon-coated magnetic nanoparticles
  • Method for preparing functionalized carbon-coated magnetic nanoparticles

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] (1) Weigh 0.30g of ferrocene and dissolve it in 30mL of acetone, and ultrasonicate for 10min to form a uniform solution;

[0032] (2) Add 0.0015g of polyacrylic acid to the above solution, and fully magnetically stir for 20min at 500rpm to form a precursor;

[0033] (3) The precursor was transferred to a stainless steel autoclave with a sealed polytetrafluoroethylene liner, and reacted at 200 °C for 18 h.

[0034] The magnetic particles prepared above are detected, figure 1 The scanning electron microscope of the magnetic particles prepared in this embodiment shows that the particle size is uniform, the dispersion is good, and there is no agglomeration phenomenon. figure 2 , image 3 and Figure 4 The transmission electron micrograph of the magnetic particles prepared in this example shows that the magnetic particles are uniformly dispersed and have good dispersibility, and each magnetic particle is formed by stacking smaller nanoparticles. The carbon layer coated on...

Embodiment 2

[0036] (1) Weigh 0.20g of ferrocene and dissolve it in 30mL of acetone, and ultrasonicate for 10min to form a uniform solution;

[0037] (2) Add 0.001g of polyacrylic acid to the above solution, and fully magnetically stir at 500rpm for 20min to form a precursor;

[0038] (3) The precursor was transferred to a stainless steel autoclave with a sealed polytetrafluoroethylene liner, and reacted at 200 °C for 18 h.

[0039] After testing, the obtained functionalized carbon-coated magnetic nanoparticles are carbon-coated Fe with uniform size, uniform shape and uniform dispersion. 3 o 4 magnetic nanoparticles.

Embodiment 3

[0041] (1) Weigh 0.35g of ferrocene and dissolve it in 30mL of acetone, and ultrasonicate for 10min to form a uniform solution;

[0042] (2) Add 0.0015g of polyacrylic acid to the above solution, and fully magnetically stir for 20min at 500rpm to form a precursor;

[0043] (3) The precursor was transferred to a stainless steel autoclave with a sealed polytetrafluoroethylene liner, and reacted at 200 °C for 18 h.

[0044] After testing, the obtained functionalized carbon-coated magnetic nanoparticles are carbon-coated Fe with uniform size, uniform shape and uniform dispersion. 3 o 4 magnetic nanoparticles.

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Abstract

The invention relates to a method for preparing functionalized carbon-coated magnetic nanoparticles. The method comprises the following steps: (1) dissolving ferrocene in acetone, and performing ultrasonic stirring so as to form a uniform solution; (2) adding polyacrylic acid into the uniform solution obtained in the step (1), and performing magnetic stirring so as to form a precursor; (3) performing a heated heat-preservation reaction on the precursor obtained in the step (2), performing cooling after the reaction is completed, removing the supernate, performing washing with acetone, and performing magnetic separation, thereby obtaining the functionalized carbon-coated magnetic nanoparticles. Compared with the prior art, the functionalized carbon-coated magnetic Fe3O4 nanoparticles prepared by using the method are synthesized by using a solvent heating method, the prepared magnetic submicrospheres are uniform in particle size, good in stability, free of aggregation among particles, and excellent in magnetic property.

Description

technical field [0001] The invention relates to the field of preparation of magnetic nanoparticles, in particular to a method for preparing functionalized carbon-coated magnetic nanoparticles. Background technique [0002] As iron ferric oxide particles with both nanometer performance and magnetic performance, it has been widely used as magnetic information materials, catalytic materials, drug targeting carriers, cell screening magnetic beads and energy storage materials, etc., involving bioengineering, electronic information and New battery and other fields. At present, a systematic synthesis method of Fe3O4 has been formed, which mainly includes coprecipitation precipitation, sol-gel method, hydrothermal synthesis method, microemulsion method, thermal decomposition method and so on. [0003] However, due to some nano-effects of nanomaterials, such as high specific surface area and surface energy, the application of magnetic nanoparticles will face some challenges, the mos...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G49/08B82Y30/00H01F1/01H01F41/02
CPCC01G49/08C01P2004/04C01P2004/62C01P2004/80H01F1/0315H01F41/02
Inventor 高国尹婷黄鹏崔大祥
Owner SHANGHAI JIAO TONG UNIV
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