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Fe3O4 nano-microsphere and preparation method thereof

A nano-microsphere, face-centered cubic technology, applied in the field of nanomaterials, can solve the problems of complex preparation process, limited product types, difficult to control, etc., and achieve the effects of rapid preparation, good magnetic properties and low cost

Inactive Publication Date: 2012-06-20
EAST CHINA NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The present invention overcomes the defects in the prior art such as high cost, complex and difficult to control preparation process, and limited types of products, and provides a Fe 3 o 4 The preparation method of nano microspheres has the beneficial effects of low cost, simple and controllable preparation process, and a wide range of products

Method used

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  • Fe3O4 nano-microsphere and preparation method thereof
  • Fe3O4 nano-microsphere and preparation method thereof
  • Fe3O4 nano-microsphere and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Fe 3 o 4 The preparation of nano microspheres comprises the following steps:

[0035] (1) FeCl 2 and FeCl 3 Dissolve in deionized water at a molar ratio of 1:2;

[0036] (2) in N 2 Under a protected environment, heat the solution obtained in step 1 to 75°C, add 1 mol / L NaOH solution dropwise to the mixed solution, adjust the pH value to 11, and stir vigorously for 2 hours to obtain Fe without polymer wrapping 3 o 4 ;

[0037] (3) Add 0.1g / mL polyethyleneimine to obtain the Fe of the present invention through modification 3 o 4 nanospheres;

[0038] (4) Use a magnet to displace the Fe obtained in step 3 3 o 4 The nano-microspheres are separated, and then dissolved in deionized water under the action of ultrasonic waves, and washed repeatedly for 5 to 20 times.

[0039] (5) The washed Fe 3 o 4 Nanospheres were dissolved in deionized water to obtain Fe 3 o 4 nanosphere solution.

[0040] Such as figure 1 Shown, X-ray diffraction test shows, the prepared F...

Embodiment 2

[0042] The temperature of step 2 is 90 ℃, all the other are identical with embodiment 1.

[0043] Such as image 3 As shown, Fe 3 o 4 The nanospheres showed good dispersion, the particle size was 50 nm–60 nm, and the obtained Fe 3 o 4 Nanospheres including Fe 3 o 4 A face-centered cubic structure and a polyethyleneimine layer wrapping its surface. Among them, Fe 3 o 4 The particle size of the nanospheres is 50 nm–60 nm, and the thickness of the polyethyleneimine layer is 0.5–2 nm.

[0044] Comparing Example 1 and Example 2, it can be found that Fe 3 o 4 The particle size of nano-microspheres is related to the set reaction temperature. When the temperature rises, the particle radius also becomes larger. The preferred reaction temperature of the preparation method of the present invention is 70°C to 80°C, which can prepare Fe with good dispersibility, uniform particle size, about 45-55 nm in size, and polyethyleneimine modification of about 1 nm on the surface. 3 o ...

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Abstract

The invention discloses a Fe3O4 nano-microsphere preparation method, which includes: adding NaOH into raw materials including FeCl2 and FeCl3 to adjust pH, preparing Fe3O4 under heating reaction, and using polyethylenimine as cationic surfactant to modify surface of the Fe3O4 so as to obtain the Fe3O4 nano-microsphere. The Fe3O4 nano-microsphere preparation method is simple in synthesis process, low in cost, quick and safe in preparation and easy in implementation of industrial production, and production equipment is simple. The Fe3O4 nano-microsphere prepared by the method is excellent in magnetic performance and high in dispersity.

Description

technical field [0001] The invention belongs to the technical field of nanomaterials, in particular to a Fe 3 o 4 Nanospheres and methods for their preparation. Background technique [0002] Nano magnetic ferroferric oxide materials are widely used. It has the characteristics of small particle size, high specific surface area, and magnetic sensitivity, and has bright prospects in the fields of bioseparation, targeted drugs, tumor magnetic hyperthermia, and immune detection. Due to the special physical and chemical properties of nano ferric oxide, it has become more and more widely used in practical applications, and the research on its preparation method and properties has also obtained in-depth progress. At the same time, since magnetism such as ferroferric oxide nanoparticles has a large specific surface area, the mutual attraction between magnetic dipoles can easily lead to agglomeration, so how to prepare ferric oxide nanoparticles with small particle size and good di...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G49/08B82Y40/00
Inventor 娄蕾郁可朱建中张正犁王依婷朱自强
Owner EAST CHINA NORMAL UNIV
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