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Preparing method of ferroferric oxide nanometer particles

A technology of ferric oxide and nanoparticles, which is applied in the direction of iron oxide/iron hydroxide, nanotechnology, nanotechnology, etc., can solve the problems of unfavorable large-scale production, complicated preparation process, narrow particle distribution, etc., and achieve convenient large-scale The production and production process are simple to operate and the effect of small crystal particles

Active Publication Date: 2014-09-10
瑞安市浙工大技术转移中心
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  • Description
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Problems solved by technology

The iron ferric oxide nanoparticles prepared by the microemulsion method have good dispersibility, regular shape and narrow particle size distribution, but the preparation process is relatively complicated, and the introduced surfactants, co-surfactants and oils have to be repeatedly prepared with organic solvents. Cleaning, and not easy to remove; ferric oxide nanoparticles prepared by co-precipitation method have uniform particles and narrow particle distribution, which is convenient for large-scale production, but the particles are agglomerated seriously; the purity of ferric oxide nanoparticles prepared by sol-gel method is high and uniform Good properties and small particles, but the preparation process is quite complicated because high temperature is required to remove impurities, and even protective airflow and reducing airflow are required; the dispersibility of Fe3O4 nanoparticles prepared by solvothermal method is good, but the reaction requires Completed under high-pressure environment, the requirements for equipment are relatively high, and large-scale production is not used

Method used

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  • Preparing method of ferroferric oxide nanometer particles
  • Preparing method of ferroferric oxide nanometer particles
  • Preparing method of ferroferric oxide nanometer particles

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preparation example Construction

[0030] A preparation method of iron ferric oxide nanoparticles with good dispersibility, the steps of the preparation method are:

[0031] (1) Preparation of Fe3O4 nanoparticles

[0032] (1-1) Take 50mL of deionized water solution and transfer it to the reaction vessel, and pass nitrogen gas into the deionized water to eliminate the oxygen in the reaction system and the reaction vessel;

[0033] (1-2) Under a nitrogen atmosphere, add ferric chloride and ferrous sulfate in an equimolar ratio to deionized water so that the molar volume concentration of ferrous iron and ferric iron is between 0.01mol / L and 0.1mol / L time, then join [BMIN]BF 4 Ionic liquid is used as a dispersant, turn on mechanical stirring, and stir at a speed of 100-200 rpm for 10 minutes to prepare an iron source dispersion solution and heat it to 70°C for later use. The deionized water and [BMIN]BF 4 The volume ratio of the ionic liquid is 100:2-14.

[0034] (1-3) Weigh sodium hydroxide and deionized water,...

Embodiment 1

[0042] A preparation method of iron ferric oxide nanoparticles with good dispersibility, the steps of the preparation method are:

[0043](1) Preparation of Fe3O4 nanoparticles

[0044] (1-1) Take 50mL of deionized water solution and transfer it to the reaction vessel, and pass nitrogen gas into the deionized water to eliminate the oxygen in the reaction system and the reaction vessel;

[0045] (1-2) In a nitrogen atmosphere, add ferric chloride and ferrous sulfate in an equimolar ratio to deionized water, so that the molar volume concentrations of ferrous sulfate containing ferrous iron and ferric chloride containing ferric iron are equal. to 0.01mol / L, then add 1mL of [BMIN]BF 4 The ionic liquid was used as a dispersant, and the mechanical stirring was turned on, and stirred at a speed of 100 rpm for 10 minutes to obtain an iron source dispersion solution, which was heated to 70°C and set aside.

[0046] (1-3) Weigh sodium hydroxide and deionized water, and prepare an aque...

Embodiment 2

[0054] A preparation method of iron ferric oxide nanoparticles with good dispersibility, the steps of the preparation method are:

[0055] (1) Preparation of Fe3O4 nanoparticles

[0056] (1-1) Measure 50mL of deionized water solution and transfer it to the reaction vessel, and pass nitrogen gas into the deionized water to eliminate the oxygen in the reaction system and the reaction vessel;

[0057] (1-2) In a nitrogen atmosphere, add ferric chloride and ferrous sulfate in an equimolar ratio to deionized water, so that the molar volume concentrations of ferrous sulfate containing ferrous iron and ferric chloride containing ferric iron are equal. to 0.05mol / L, then add 3mL of [BMIN]BF 4 The ionic liquid was used as a dispersant, and the mechanical stirring was turned on, and stirred at a speed of 100 rpm for 10 minutes to obtain an iron source dispersion solution, which was heated to 70°C and set aside.

[0058] (1-3) Weigh sodium hydroxide and deionized water, and prepare an ...

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Abstract

The invention relates to a preparing method of ferroferric oxide nanometer particles with good dispersibility. The ferroferric oxide nanometer particles are prepared by steps of: adding ferric chloride and ferrous sulfate having the same molar as the ferric chloride into deionized water under the protection of an inert gas, so that the molar volume concentration of the ferrous sulfate containing ferrous iron and the molar volume concentration of the ferric chloride containing ferric iron are both maintained between 0.01-0.1 mol / L; adding a [BMIN]BF4 ionic liquid in place of a traditional surfactant; mixing uniformly; adding dropwise a sodium hydroxide solution adopted as a precipitator at 70 DEG C to precipitate to obtain a reaction product; washing alternatively with deionized water and absolute ethyl alcohol; centrifuging; and drying under vacuum. Raw materials used in the method are easily available, low in cost and short in preparation period. The obtained ferroferric oxide nanometer particles can be used as high-performance catalysts, magnetic materials and electrode materials.

Description

(1) Technical field [0001] The invention relates to a method for preparing nanometer materials, in particular to a method for preparing iron ferric oxide nanoparticles with good dispersibility. (2) Background technology [0002] Nanomaterials have attracted more and more attention due to their unique properties different from ordinary materials. As an emerging science and technology with the most market application potential, nanotechnology has no doubts about its potential importance. [0003] Ferroferric oxide nanoparticles have the characteristics of small size, high surface energy, large specific area and other nanomaterials, and have good electrical conductivity and magnetism, and have a wide range of applications in magnetic recording materials, magnetic fluids, catalysis, medicine, pigments, etc. application. At present, the liquid-phase chemical preparation methods for preparing ferroferric oxide mainly include: microemulsion method, co-precipitation method, sol-ge...

Claims

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Application Information

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IPC IPC(8): C01G49/08B82Y30/00
Inventor 胡军胡熙健陈爱民汪晶
Owner 瑞安市浙工大技术转移中心
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