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Method for preparing shape-controlled alpha type iron trioxide micro/nano material

A ferric oxide, micro-nano technology, applied in the fields of iron oxide, iron oxide/iron hydroxide, nanotechnology for materials and surface science, etc., to achieve good repeatability, high crystallinity, and controllable morphology. Effect

Active Publication Date: 2014-01-15
武汉华研长欣工程技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These methods all have certain defects. For example, some methods can only synthesize one shape, and some synthesis processes require the use of toxic and harmful chemical reagents, and the addition of templates or surfactants to control the shape of nanomaterials.

Method used

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  • Method for preparing shape-controlled alpha type iron trioxide micro/nano material
  • Method for preparing shape-controlled alpha type iron trioxide micro/nano material
  • Method for preparing shape-controlled alpha type iron trioxide micro/nano material

Examples

Experimental program
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Effect test

Embodiment 1

[0022] Example 1 The preparation method of spherical α-type iron trioxide includes the following steps:

[0023] Take 8mL of 200mmol / L ferric chloride aqueous solution, add 32mL of 50mmol / L HEPES aqueous solution, stir well, transfer to a stainless steel reactor lined with polytetrafluoroethylene, seal it and put it in a constant temperature oven at 150℃ to react for 6h, then take out the reaction The kettle is naturally cooled in the air. The red precipitate in the kettle is separated by centrifugation, and the precipitate is washed with absolute ethanol and deionized water. Finally, it is dried in an oven at 60°C for 12 hours to obtain a diameter of Spherical α-type iron trioxide of 200~900nm.

[0024] Attached figure 1 It is the XRD spectrum of spherical α-type ferric oxide. It can be seen from the XRD spectrum that the XRD spectrum of the obtained sample is consistent with the standard pattern of α-type ferric oxide (JCPDS No. 33-0664), indicating the preparation The result is...

Embodiment 2

[0025] Embodiment 2 The preparation method of spherical α-type iron trioxide includes the following steps:

[0026] Take 8mL of 200mmol / L ferric chloride aqueous solution, add 16mL of 100mmol / L HEPES aqueous solution, stir well, transfer to a stainless steel reactor lined with polytetrafluoroethylene, seal it and put it in a 160℃ constant temperature oven to react for 12h, then take out the reactor. Naturally cool in the air, separate the red precipitate in the kettle by centrifugation, and wash the precipitate with absolute ethanol and deionized water, and finally dry it in an oven at 60°C for 12 hours to obtain a diameter of 700nm~ 1.8μm spherical α-type iron trioxide.

Embodiment 3

[0027] Example 3 The preparation method of porous rod-shaped α-type iron trioxide includes the following steps:

[0028] Take 8mL of 200mmol / L ferric chloride aqueous solution, 8mL of 200mmol / L ferrous sulfate aqueous solution and 16mL of 100mmol / L HEPES aqueous solution, stir well, transfer to a stainless steel reactor lined with polytetrafluoroethylene, seal and put into React in a constant temperature oven at 180°C for 12 hours, then take out the reaction kettle and let it cool naturally in the air. The yellow precipitate in the kettle is separated by centrifugation, and the precipitate is washed with absolute ethanol and deionized water, and finally in a muffle furnace Heat treatment at 300°C for 2h, take it out and cool it in a desiccator to obtain a porous rod-shaped α-type iron trioxide with a length of 50-100nm and a diameter of 10-20nm.

[0029] Attached image 3 It is the XRD spectrum of the prepared porous rod-shaped α-type iron trioxide. It can be seen from the XRD spe...

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Abstract

The invention discloses a method for preparing an alpha type iron trioxide micro / nano material regulated by iron salt. The method comprises the following steps: adding aqueous solutions of different types of iron salts into an aqueous solution of 4-hydroxyethylpiperazine ethane sulfonic acid (HEPES), performing operations of cooling, centrifuging, washing and heat treatment according to a hydrothermal method, respectively obtaining spherical, porous rod-shaped and cuberille alpha type iron trioxide micro / nano materials with the size of 10nm to 1.8 Mum. The adopted method has the advantages of simplicity, practicability, environment friendliness, controllable product shape and high repeatability.

Description

Technical field [0001] The invention belongs to the field of inorganic non-metallic materials, and in particular relates to an alpha-type iron trioxide (α-Fe 2 O 3 ) Preparation method of micro and nano materials. Background technique [0002] α-type ferric oxide micro / nano material is an environment-friendly n-type semiconductor with a band gap width (E g ) Is 2.1eV. It has strong light absorption performance in the visible wavelength range. In addition, it has the advantages of non-toxicity, low preparation cost, and good chemical stability. It has been widely used in gas sensors, coatings, electronic materials, and magnetic recording. Materials, catalysts, water treatment agents, and biomedical engineering. In research, it has been found that α-type iron trioxide micro-nano materials with different morphologies have different functions. For example, α-type ferric oxide nanorods can be used as photocatalysts to degrade organic dyes (rhodamine B); α-type trioxide Di-iron nanotu...

Claims

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Application Information

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IPC IPC(8): C01G49/06B82Y30/00
Inventor 陈嵘刘二涛杨浩吕中
Owner 武汉华研长欣工程技术有限公司
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