Method for preparing radius-controllable ferric oxide hollow ball

A technology of iron oxide and iron oxide nanometers, which is applied in the field of chemical materials, can solve the problems of inability to quickly adjust the particle size of the product, unfavorable industrial production, and difficulty in product separation, and achieve products with strong controllability, excellent product crystallization, and high purity. Effect

Inactive Publication Date: 2007-09-19
ANHUI UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] There are some common problems in the above preparation processes, for example, the homosynthetic liquid phase system is composed of more than three solvents and surfactants, the system components are complex, and the yield is low, the production cost is high, the product separation is difficult, and the crystallization condition is poor, etc.
At the same time, these methods often use a one-step method to react, which cannot quickly adjust the particle size of the product according to actual needs, which is not conducive to industrial production.

Method used

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  • Method for preparing radius-controllable ferric oxide hollow ball
  • Method for preparing radius-controllable ferric oxide hollow ball
  • Method for preparing radius-controllable ferric oxide hollow ball

Examples

Experimental program
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Effect test

Embodiment 1

[0028] Example 1: First, the aqueous solution containing 0.1M ferric chloride and 0.15M urea is mixed with ethanol (alcohol / water volume ratio=5:1) and then packed into a three-necked flask; heated and refluxed for 8 hours under continuous stirring; the obtained The product was separated by suction filtration, washed three times with ethanol and distilled water, and then dried in an oven at 60°C to obtain iron hydroxide nanorods; the iron hydroxide nanorods accounting for 0.05% by weight of the ethanol / water mixed system were dispersed Stir evenly in an ethanol / water mixed system with a volume ratio of 20:1, then put it into a stainless steel reactor with a filling degree of 80%; treat it at 160°C for 8 hours, cool it naturally, wash the product with ethanol and distilled water 3 times, and put it in an oven Iron oxide hollow spheres can be obtained after medium drying.

Embodiment 2

[0029] Example 2: First, mix the aqueous solution containing 0.3M ferric chloride and 0.45M urea with n-propanol (alcohol / water volume ratio = 1: 1) and put it into a three-necked flask; heat and reflux for 4 hours under continuous stirring; The obtained product was separated by suction filtration, and the product was washed with ethanol and distilled water for 3 times, and then dried in an oven at 60°C to obtain iron hydroxide nanorods; Disperse in an ethanol / water mixed system with a volume ratio of 30:1 and stir evenly, then put it into a stainless steel reactor with a filling degree of 70%; treat it at 180°C for 10 hours, cool naturally, wash the product three times with ethanol and distilled water, and then put it in After drying in an oven, iron oxide hollow spheres can be obtained.

Embodiment 3

[0030] Embodiment 3: first will prepare the aqueous solution containing 0.3M ferric chloride and 0.45M urea and isopropanol (alcohol / water volume ratio=1: 5) and mix and then pack into a three-necked flask; heat and reflux for 4 hours under continuous stirring The obtained product is separated by suction filtration, and the product is washed 3 times with ethanol and distilled water, and then dried in an oven at 60°C to obtain iron hydroxide nanorods; the iron hydroxide nanorods accounting for 4.0% of the ethanol / water mixed system Disperse the rods in an ethanol / water mixed system with a volume ratio of 10:1 and stir evenly, then put them into a stainless steel reactor with a filling degree of 80%; treat at 200°C for 4 hours, cool naturally, and wash the product 3 times with ethanol and distilled water Iron oxide hollow spheres can be obtained after drying in an oven.

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Abstract

The present invention relates to a preparation method of ferric oxide hollow ball, the grain size of which can be controlled. In the present invention, the inorganic iron salt and urea are used as raw material and is dissolved in a mixture system of inferiority monohydric alcohol and water; the iron-containing precursor is obtained by the coprecipitation technique, and then is dispersed into the inferiority monohydric alcohol / water mixture system, finally is heated to a certain temperature with a certain reaction time under the condition of hot mixed solvent, thereby, the ferric oxide(alpha-Fe2O3)submicron grain with single crystal hollow structure, narrow particle size distribution and excellent dispersity is obtained. The hollow ball with controlled grain can be obtained by simply adjusting the compounding ration of the reaction system. The present invention has the advantages of simple system, high output, even grain, pure product, easy separation process and excellent crystallinity, and is adapted to industrialization production.

Description

Technical field: [0001] The invention belongs to the technical field of chemical materials, and in particular relates to a method for preparing iron oxide hollow spheres with controllable particle diameters by using solvothermal technology. Background technique: [0002] Iron oxide (α-Fe 2 o 3 ) Nanoparticles have good weather resistance, light resistance, magnetism and good absorption and shielding effect on ultraviolet rays, and can be widely used in flash coatings, inks, plastics, leather, automotive topcoats, electronics, high magnetic recording materials, magnetic Fluids, catalysts, and biomedical processes. Iron oxide (α-Fe 2 o 3 ) Nano and submicron hollow spheres have the above-mentioned characteristics of iron oxide nanoparticles, and because of their hollow structure, they are also potential in magnetic fluids, biomedicine, micro-load delivery systems, surface functionalization, sensors and catalyst carriers, etc. Application prospects, its preparation technol...

Claims

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Application Information

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IPC IPC(8): C01G49/06B82B3/00
Inventor 俞海云郑翠红闫勇朱伟长
Owner ANHUI UNIVERSITY OF TECHNOLOGY
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