Method for preparing alpha-ferroso-ferric oxide nano-ring 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 the problems of complex production process and equipment, poor product uniformity, and difficult industrial production. Achieve the effects of easy scale expansion, simple equipment, and convenient production

Inactive Publication Date: 2008-09-17
SHANXI INST OF COAL CHEM CHINESE ACAD OF SCI
View PDF0 Cites 18 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, only German "Advanced Materials" (Adv.Mater., 2007, volume 19, page 2324) has an article on alpha-ferric oxide (α-Fe 2 o 3 ) Nanoring, the production method is ultrasonic hydrothermal, its production process and equipment are relatively complicated, the production cost is high, and the uniformity of the obtained product is not good, it is difficult to achieve large-scale industrial production

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Take 9mmol / L ferric chloride aqueous solution, then add an equal volume of 3mmol / 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, and dry it in the air at 60°C to obtain alpha-ferric oxide (α -Fe 2 o 3 ) nanorings.

Embodiment 2

[0017] Take 30mmol / L ferric chloride aqueous solution, then add an equal volume of 5mmol / L sodium dihydrogen phosphate aqueous solution, stir evenly, transfer to a polytetrafluoroethylene reaction kettle, seal it and put it in a constant temperature oven at 210°C for 36 hours, then Take out the reaction kettle and cool it naturally in the air. The red precipitate in the kettle is separated by centrifugation, washed 3 times with water, and dried in the air at 80°C to obtain an inner diameter of 45nm and an outer diameter of 160nm to obtain Alpha-Fe2O3 (α-Fe 2 o 3 ) nanorings.

Embodiment 3

[0019] Take 40mmol / L ferric chloride aqueous solution, then add an equal volume of 7mmol / 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 and cool it naturally in the air. The red precipitate in the kettle is separated by centrifugation, washed 4 times, and dried in the air at 70°C to obtain alpha-iron sesquioxide with an inner diameter of 80nm and an outer diameter of 150nm. (α-Fe 2 o 3 ) nanorings.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

A nontemplated method for producing Alpha-ferric oxide nanorings comprises the steps of collecting 9-50 mmol/L ferric trichloride aqueous solution, adding equivoluminal 3-10 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 nanorings. The inventive method has the advantages of narrow size distribution of Alpha-ferric oxide nanoring particles, uniform adjustment of ring internal diameter, easily accessible raw materials, simple production process, good product reproducibility, no pollution, and applicability to large-scale production.

Description

technical field [0001] The invention belongs to a preparation method of nano rings, in particular to a non-template method for preparing alpha-ferric oxide (α-Fe 2 o 3 ) nanoring method. 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 re...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
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
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap