Preparation method of three-dimensional flower-shaped structure alpha-type ferric oxide

A ferric oxide, three-dimensional flower-like technology, used in iron oxide, iron oxide/hydroxide, nanotechnology for materials and surface science, etc., to achieve mild conditions, large output, and superior magnetic properties.

Inactive Publication Date: 2012-12-19
XIAMEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Most of the published literature reports have focused on the regulation of the morphology of Fe2O3 monomers, while the formation of complex assemblies through monomer self-assembly is less involved.

Method used

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  • Preparation method of three-dimensional flower-shaped structure alpha-type ferric oxide
  • Preparation method of three-dimensional flower-shaped structure alpha-type ferric oxide
  • Preparation method of three-dimensional flower-shaped structure alpha-type ferric oxide

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] (1) Weigh 0.33g (about 1mmol) of potassium ferricyanide, dissolve it in 10mL of deionized water, stir to dissolve it fully; prepare 10mL of 0.12g (3mmol) of sodium hydroxide solution, and mix it with Potassium ferricyanide solution mixed. The concentration of potassium ferricyanide in the mixed solution is 0.05M, and the concentration of sodium hydroxide is 0.15M.

[0022] (2) Add 0.384g (about 6.4mmol) of urea to the mixture, stir to dissolve it fully, and obtain a light yellow clear solution. The concentration of urea in the mixed solution is 0.32M.

[0023] (3) Transfer the above-mentioned yellow clear solution to a 50mL polytetrafluoroethylene-lined stainless steel reaction kettle, seal it and raise the temperature to 180°C for 12h.

[0024] (4) Cool down to room temperature naturally after the reaction is complete, centrifuge the sediment at the bottom of the kettle, wash with absolute ethanol and deionized water for 2 to 3 times, and dry the obtained product at ...

Embodiment 2

[0031] (1) Weigh 0.33g (about 1mmol) of potassium ferricyanide, dissolve it in 10mL of deionized water, stir to dissolve it fully; prepare 10mL of 0.08g (2mmol) of sodium hydroxide solution, and mix it with Potassium ferricyanide solution mixed. The concentration of potassium ferricyanide in the mixed solution is 0.05M, and the concentration of sodium hydroxide is 0.10M.

[0032] (2) Same as embodiment 1.

[0033] (3) The above-mentioned yellow clear solution was transferred to a polytetrafluoroethylene-lined stainless steel reaction kettle with a capacity of 50mL, sealed and heated to 180°C for 16h.

[0034] (4) Same as embodiment 1.

Embodiment 3

[0036] (1) Same as embodiment 1.

[0037] (2) Add 0.192g (about 3.2mmol) of urea to the mixture, stir to dissolve it fully, and obtain a light yellow clear solution. The concentration of urea in the mixed solution is 0.16M.

[0038] (3) Transfer the above-mentioned yellow clear solution to a stainless steel reaction kettle lined with polytetrafluoroethylene with a capacity of 50mL, seal it and raise the temperature to 180°C for 16h.

[0039] (4) Same as embodiment 1.

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Abstract

The invention relates to a preparation method of three-dimensional flower-shaped structure alpha-type ferric oxide, and relates to inorganic metal material ferric oxide, wherein the three-dimensional flower-shaped structure is obtained by carrying out self-assembly on two-dimensional petal-shaped ferric oxide. The particles prepared by the method are good in dispersity, uniform in size distribution and excellent in magnetic property. The method comprises the steps of: 1) respectively preparing potassium ferricyanide solution and sodium hydroxide solution, and then mixing to obtained mixed solution; 2) adding urea into the mixed solution to obtain faint yellow clear solution; and 3) transferring the faint yellow clear solution into a reaction kettle, sealing, carrying out heating reaction, cooling products to the room temperature, carrying out centrifugal separation on precipitate at the bottom of the kettle, washing and drying to obtain the three-dimensional flower-shaped structure alpha-type ferric oxide.

Description

technical field [0001] The invention relates to an inorganic non-metallic material ferric oxide, in particular to a preparation method of α-type ferric oxide with a three-dimensional flower-like structure. Background technique [0002] α-type ferric oxide is an important metal oxide, which has the characteristics of n-type semiconductors. Its band gap width is 2.2eV and it has strong absorption in the visible light region. It has a wide range of applications in electronics, magnetic recording materials, catalysts, and biomedical engineering. In addition, due to its high gas sensitivity, ferric oxide can also be used to detect combustible and toxic gases in the air. [0003] The size, shape, and structure of materials have a great influence on their related properties. The preparation of ferric oxide with a specific structure and the study of its related properties and applications have become more active research fields. Related literatures have reported Fe2O3 with differ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G49/06B82Y30/00B82Y40/00
Inventor 王周成梁汉锋
Owner XIAMEN UNIV
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