A kind of preparation method of iron ferric oxide nanoparticles

A technology of ferric tetroxide and nano-particles, applied in the direction of iron oxide/iron hydroxide, nanotechnology, nanotechnology, etc., can solve the problems of complex operation, high reaction temperature, wide particle size range, etc.

Active Publication Date: 2021-05-04
于晓峰
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But the particle size of ferric oxide that this method makes is bigger, and cost is high, and particle size range is wider, and reaction temperature is high, and operation is complicated

Method used

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  • A kind of preparation method of iron ferric oxide nanoparticles
  • A kind of preparation method of iron ferric oxide nanoparticles
  • A kind of preparation method of iron ferric oxide nanoparticles

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] The preparation method of ferric oxide nanoparticles is carried out according to the following steps:

[0042] (1) Water-soluble Fe 2+2000 grams of salt, specifically ferrous chloride salt, dissolved in a reaction kettle with 30L of distilled water equipped with an ultrasonic generator, raised the temperature to 40-60°C, stirred and added 1000-1600ml of ammonia water, and adjusted the pH of the reaction solution to between 6-9 In between, add 2-6% (sodium oleate + sodium dodecylbenzenesulfonate) combined dispersant, heat up to 60-80°C, and turn on the ultrasonic generator, the ultrasonic power is controlled at 1.5kw, and the frequency is 28KHz .

[0043] (2) After reacting for 2-5 hours, the solution turns black, and the temperature is raised to 80-90° C. for aging for 1 hour, and then the reaction is stopped. After the solution was cooled to 50°C, the reaction product was centrifuged to remove the liquid to obtain a solid, and the solid was washed with deionized wate...

Embodiment 2

[0049] The preparation method of ferric oxide nanoparticles is carried out according to the following steps:

[0050] (1) Water-soluble Fe 2+ 3000 grams of salt (comprising ferrous chloride salt and ferrous sulfate salt), dissolved in a reaction kettle with 30L distilled water equipped with an ultrasonic generator, heated up to 40-60°C, stirred and added 500-1000g sodium hydroxide, adjusted The pH of the reaction solution is between 6-9, then add 2-6% (sodium oleate + sodium dodecylbenzenesulfonate) combined dispersant, after heating up to 60-80°C, add 100 grams of sodium carbonate, and open Ultrasonic generator, the ultrasonic power is controlled at 1kw, and the ultrasonic frequency is 40KHz.

[0051] (2) After reacting for 3-4 hours, the solution turns black, and the temperature is raised to 80-90° C. for aging for 1 hour, and then the reaction is stopped. After the solution was cooled to 40°C, the reaction product was centrifuged at 5000rpm to remove the liquid to obtain ...

Embodiment 3

[0057] The preparation method of ferric oxide nanoparticles is carried out according to the following steps:

[0058] (1) Water-soluble Fe 2+ 2000 grams of salt (comprising ferrous chloride salt and ferrous sulfate salt), be dissolved in the reactor that fills the configuration ultrasonic generator of 30L distilled water, be warming up to 40-60 ℃, stir and add 1000-1600ml ammoniacal liquor (25wt% concentration ), adjust the pH of the reaction solution between 6-9, then add 2-6% (sodium oleate + sodium dodecylbenzenesulfonate) combined dispersant, after the temperature rises to 60-80°C, add 300 grams of sodium carbonate , and turn on the ultrasonic generator, the ultrasonic power is controlled at 2.0kw, and the ultrasonic frequency is 40KHz.

[0059] (2) After reacting for 4-5 hours, the solution turns black, and the temperature is raised to 80-90°C for aging for 1 hour, and then the reaction is stopped. After the solution was cooled to 40°C, the reaction product was centrifu...

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Abstract

The invention provides a ferroferric oxide nanoparticle and a preparation method thereof. The particle size of the nanoparticle is between 20-30nm, the saturation magnetization is above 70emu / g, the remanence is below 0.2emu / g, and the coercivity is below 0.2emu / g. The force is below 1.0Oe, and the preparation method includes the following steps: (A) dissolving the ferrous salt to form a reaction solution, adding alkali to adjust the pH of the reaction solution to between 6-9, and ultrasonically reacting at 60-80°C for 2-6h; (B) Raise the temperature to 80-90°C to react and mature for 0.5-1.5h, cool, centrifuge and dry in vacuum. The iron ferric oxide nanoparticles prepared by the present invention have relatively small particle size range, excellent magnetic performance, high saturation magnetization, very small remanence and coercive force, and the direction of easy magnetization between nanoparticles is the same on the microstructure , showing good superparamagnetism.

Description

technical field [0001] The invention relates to the field of preparation of nanomaterials, in particular to a preparation method of iron ferric oxide nanoparticles. Background technique [0002] With the development of nanotechnology, the application prospects of magnetic nanoparticles have been greatly expanded. The superparamagnetism, surface effect, small size effect and other properties exhibited by nano-ferroferric oxide make it widely used in magnetic sealing, magnetic liquid materials, quantum tunneling effect, special catalyst raw materials, contrast imaging, targeted drug delivery, cell separation, It shows special functions in heavy metal adsorption and other aspects. There are mainly two methods for preparing nanometer iron ferric oxide particles: physical methods and chemical methods. [0003] Nanoparticles prepared by physical methods generally have low purity, uneven particle distribution, and irregular morphology, so physical preparation methods are basicall...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01G49/08B82Y30/00
CPCB82Y30/00C01G49/08C01P2002/72C01P2004/03C01P2004/64
Inventor 于晓峰
Owner 于晓峰
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