Method for hydrothermally synthesizing Alpha-iron oxide red nanocrystalline

A technology of ferric oxide and hydrothermal synthesis, which is applied in the direction of iron oxide, chemical instruments and methods, iron oxide/iron hydroxide, etc., to achieve the effect of simple operation and low cost

Inactive Publication Date: 2009-09-16
TIANJIN POLYTECHNIC UNIV
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  • Description
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Problems solved by technology

For the preparation method of network alpha-Fe2O3 nanocrystals, there are few reports at present.

Method used

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  • Method for hydrothermally synthesizing Alpha-iron oxide red nanocrystalline

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Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0011] Add 15mL distilled water into a 50mL beaker, add 1.06g potassium ferrocyanide under stirring, continue to stir until potassium ferrocyanide is completely dissolved, then add 5mL hydrogen peroxide, continue stirring for 10 minutes, then transfer the above solution to 50mL reaction In the kettle, it was crystallized at 140°C for 3 hours. After the reaction, the reaction kettle was naturally cooled to room temperature. The obtained red precipitate was washed with deionized water until neutral, and the obtained product was vacuum-dried at 120°C for 3 hours to obtain the final product.

Embodiment approach 2

[0013] Change the crystallization time in Embodiment 1 to 6 hours, and keep other conditions unchanged.

Embodiment approach 3

[0015] The crystallization time in Embodiment 1 was changed to 9 hours, and other conditions were unchanged.

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Abstract

The invention relates to a method for synthesizing Alpha-iron oxide red nanocrystalline of different shapes by hydrothermal control, belonging to the technical field of inorganic nano material preparation technology. In the invention, water is taken as a solvent, yellow potassium ferrocyanide is dissolved in water, and hydrogen peroxide is added as an oxidant, the ion concentration of hexacyanoferrate is controlled within the range of 0.01-1mol/L, the volume ratio between water and hydrogen peroxide is 0-10:1, and precursor solution is obtained. Then, the precursor is put in a hermetic reaction kettle lined with polytetrafluoroethylene for 0.5-48 hours of crystallization at the temperature of 100-180 DEG C to obtain the Alpha-iron oxide red nanocrystalline. The Alpha-iron oxide red synthesized by the method is uniform in size distribution, controllable in shape, low in cost, simple in equipment, safe and easy in operation, excellent in technique repetition and stable in product quality, and is suitable for industrial large scale production.

Description

technical field [0001] The invention belongs to the technical field of preparation of inorganic nanometer materials, and relates to a preparation method of inorganic nanometer materials, in particular to a method for synthesizing alpha-ferric oxide nanocrystals. Can be applied to building materials, coatings, plastics, rubber, ceramics, glass, paper, Reclamation, linoleum, art paints, medicine, cosmetics, catalysts, advanced grinding materials, magnetic recording materials, pet feed additives, etc. Background technique [0002] Alpha-Fe2O3 is the most common iron oxide, and it is also a semiconductor material. As an important industrial raw material and product, the research on the properties and preparation of iron oxide has been widely concerned. 80% of all iron oxides consumed in the world are chemically synthesized, known as synthetic iron oxides. Only 20% is processed from natural minerals known as natural iron oxides. Synthetic iron oxide has good hue and excellent...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C30B7/10C30B29/16C01G49/06
Inventor 宋立民张淑娟
Owner TIANJIN POLYTECHNIC UNIV
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