Method for preparing alpha-ferroso-ferric oxide nano-tube by non-template process

A technology of ferric oxide and non-template method, which is applied in the direction of iron oxide, iron oxide/iron hydroxide, nanotechnology, etc., can solve problems such as large-scale production difficulties, increase product cost, and introduce impurities, and achieve expansion Scale, easy production, and the effect of improving purity

Inactive Publication Date: 2008-09-17
SHANXI INST OF COAL CHEM CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The template method will not only introduce impurities into the product, but also increase the cost of the product, and large-scale production is also quite difficult, which has caused a bottleneck in its actual production application

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Take 9mmol / L ferric chloride aqueous solution, then add an equal volume of 0.4mmol / L sodium dihydrogen phosphate aqueous solution, stir evenly, transfer to a polytetrafluoroethylene reactor, seal it and put it in a constant temperature oven at 200°C for 18 hours. Then take out the reaction kettle, cool it naturally in the air, separate the red precipitate in the kettle by centrifugation, wash it twice with water, and dry it in the air at 60°C to get alpha-iron sesquioxide (α-Fe 2 o 3 )nanotube.

Embodiment 2

[0017] Take 18mmol / L ferric chloride aqueous solution, then add an equal volume of 0.9mmol / L sodium dihydrogen phosphate aqueous solution, stir evenly, transfer to a polytetrafluoroethylene reactor, seal it and put it in a constant temperature oven at 210°C for 36 hours, Then take out the reaction kettle, cool it naturally in the air, separate the red precipitate in the kettle by centrifugation, wash it with water three times, and dry it in the air at 80°C to get Alpha-iron sesquioxide (α-Fe 2 o 3 )nanotube.

Embodiment 3

[0019] Take 35mmol / L ferric chloride aqueous solution, then add an equal volume of 1.6mmol / L sodium dihydrogen phosphate aqueous solution, stir evenly, transfer to a polytetrafluoroethylene reactor, seal it and put it in a constant temperature oven at 240°C for 45 hours, Then take out the reaction kettle, cool it naturally in the air, separate the red precipitate in the kettle by centrifugation, wash it with water 4 times, and dry it in the air at 70°C to get alpha-iron sesquioxide (α-Fe 2 o 3 )nanotube.

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Abstract

A nontemplated method for producing Alpha-ferric oxide nanotubes comprises the steps of collecting 9-50 mmol / L ferric trichloride aqueous solution, adding equivoluminal 0.3-2.5 mmol / L sodium dihydrogen phosphate aqueous solution, stirring, placing into a sealed reaction vessel, sealing, performing constant temperature treatment at 180-270 DEG C for 12-72 hours, taking out of the reaction vessel, air cooling, separating red precipitate in the vessel, water washing for 2-5 times, and oven-drying in the air at 60-80 DEG C to obtain Alpha-ferric oxide nanotubes. The inventive method has the advantages of narrow size distribution of Alpha-ferric oxide nanotube particles, uniform tube diameter, simple production process and operation, good product reproducibility, and applicability to large-scale production.

Description

technical field [0001] The invention belongs to a method for preparing nanotubes, in particular to a method for preparing alpha-ferric oxide (α-Fe 2 o 3 ) nanotube approach. technical background [0002] Nanoparticles have quantum size effect, small size effect, surface effect, macroscopic quantum tunneling effect, Coulomb blockage and dielectric confinement effect, which make them play an important role in optical, electrical, magnetic, thermal, mechanical properties, chemical properties, biophysical properties, etc. All aspects have shown new characteristics different from conventional solids and macroscopic particles. The performance of nanomaterials is largely determined by the microscopic morphology of nanoparticles, so the synthesis of nanoparticles with various special shapes has become an indispensable and important part of the field of nanoscience. [0003] As a cheap and environmentally friendly transition metal oxide, iron oxide has good weather resistance, lig...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G49/06B82B3/00
Inventor 孙予罕吕宝亮吴东徐耀
Owner SHANXI INST OF COAL CHEM CHINESE ACAD OF SCI
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