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Fibroin-controlled alpha type ferric oxide nano material and preparation method thereof

A technology of ferric oxide and nanomaterials, which is applied in the field of nanomaterials and natural polymer materials, can solve the problems of insufficient system and sufficient, time-consuming, energy-consuming, high cost, complicated method and process, and achieve mild conditions and easy operation , Environmentally friendly effect

Active Publication Date: 2012-08-29
FUDAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But all there are some shortcoming or inconvenience in these methods, often need to add poisonous and harmful chemical reagent in the synthesis process as some, some need after-treatment (such as heat up solvent is removed or select suitable solvent template agent is removed ) to obtain products, and some require special pH ranges or organic solvents in the synthesis process to control the shape and size of nanoparticles
Therefore, these methods for synthesizing α-type ferric oxide nanomaterials are relatively complicated, and have the disadvantages of time-consuming, energy-consuming and high cost.
At the same time, since the current basic research on the shape and size controllability of α-Fe2O3 nanoparticles is still not systematic and sufficient, in order to meet different needs, a simple, easy-to-control, and green method is adopted to regulate the α-Fe2O3 nanoparticles. The morphology and size of ferric oxide nanoparticles are of great significance

Method used

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  • Fibroin-controlled alpha type ferric oxide nano material and preparation method thereof
  • Fibroin-controlled alpha type ferric oxide nano material and preparation method thereof
  • Fibroin-controlled alpha type ferric oxide nano material and preparation method thereof

Examples

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Effect test

Embodiment 1

[0024] Example 1: 0.135g of anhydrous ferric chloride was added to about 50mL of regenerated silk protein aqueous solution with a mass concentration of 0.01% under stirring, so that the molar concentration of ferric chloride was 0.01mol / L. Continue stirring for 5 minutes to fully dissolve ferric chloride to obtain a light yellow clear solution. Transfer the pale yellow clear solution to a 100mL polytetrafluoroethylene-lined stainless steel reactor, seal and heat up to 160 o C reacted for 10h. After the reaction was finished, the product was cooled to room temperature, then the solution in the reaction system was centrifuged, and the precipitate was washed 4 times with absolute ethanol and deionized water, and then washed at 50 o C drying for 20 hours, the nearly cubic α-type ferric oxide nanomaterial with a particle size of 50nm can be obtained.

Embodiment 2

[0025] Example 2: 0.135g of anhydrous ferric chloride was added to about 50mL of regenerated silk protein aqueous solution with a mass concentration of 0.1% under stirring, so that the molar concentration of ferric chloride was 0.01mol / L. Continue to stir for 10 minutes to fully dissolve ferric chloride to obtain a light yellow clear solution. Transfer the pale yellow clear solution to a 100mL polytetrafluoroethylene-lined stainless steel reactor, seal and heat up to 160 o C reacted for 20h. After the reaction is finished, the product is cooled to room temperature, then the solution in the reaction system is centrifuged, and the precipitate is washed 5 times with absolute ethanol and deionized water, and then washed at 90 o C dried for 10 hours to obtain spherical α-type ferric oxide nanomaterials with a particle size of 50 nm.

Embodiment 3

[0026] Example 3: 0.27g of anhydrous ferric chloride was added to about 50mL of regenerated silk protein aqueous solution with a mass concentration of 0.5% under stirring, so that the molar concentration of ferric chloride was 0.02mol / L. Continue to stir for 20 minutes to fully dissolve ferric chloride to obtain a light yellow clear solution. Transfer the pale yellow clear solution to a 100mL polytetrafluoroethylene-lined stainless steel reaction kettle, seal and heat up to 180 o C reacted for 5h. After the reaction was finished, the product was cooled to room temperature, then the solution in the reaction system was centrifuged, the precipitate was washed twice with absolute ethanol and deionized water, and then washed at 100 o C drying for 8 hours to obtain a spherical α-type ferric oxide nanomaterial with a particle size of 100 nm.

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Abstract

The invention belongs to the technical fields of nano materials and natural macromolecular materials and particularly relates to a fibroin-controlled alpha type ferric oxide nano material and a preparation method thereof. The alpha type ferric oxide nano material is nearly cuboidal, spherical or olivary and is 10 to 1,000 nm in size. The fibroin serving as a template is directly used for controlling synthesis of the nano material; and particularly, the alpha type ferric oxide nano material is prepared by adding ferric oxide into a fibroin solution through hydrothermal reaction and operation such as cooling, centrifuging, washing, drying and the like. The size and the shape of the alpha type ferric oxide nano material can be controlled by changing the fibroin content and the ferric oxide content. The alpha type ferric oxide nano material prepared by using natural protein as the template is simple in preparation process and environment-friendly, saves energy and has high efficiency. The size and the shape of the product can be controlled.

Description

technical field [0001] The invention belongs to the technical field of nanomaterials and natural polymer materials, and in particular relates to an α-type ferric oxide (α-Fe2O) with controllable size and shape. 2 o 3 ) Nanomaterials and methods for their preparation. Background technique [0002] α-type ferric oxide is a very important metal oxide, which has the characteristics of n-type semiconductor, its bandgap width is 2.2 eV, and it has strong absorption in the visible region, because it is non-toxic and does not cause environmental pollution , coupled with low cost, it is widely used in flash coatings, plastics, electronic materials, magnetic recording materials, catalysts, water treatment agents, and biomedical engineering; in addition, due to its high gas sensitivity, α-type three Ferric oxide can also be used to detect flammable and toxic gases in the air. [0003] In the method of synthesizing α-type ferric oxide nanomaterials, the soft-templates method uses sup...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G49/06B82Y40/00
Inventor 陈新费翔邵正中刘也卓
Owner FUDAN UNIV
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