Preparation method of superparamagnetic hollow ferroferric oxide microspheres

A triiron tetroxide and superparamagnetic technology, applied in the direction of iron oxide/iron hydroxide, ferrous oxide, diamagnetic/paramagnetic materials, etc. Amplify the use and other problems to achieve the effect of good catalytic performance, simple process and low cost

Inactive Publication Date: 2017-11-03
ZHEJIANG SCI-TECH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the high cost and cumbersome synthesis steps of template methods prevent the scale-up of these methods for large-scale applications
In addition, the template method needs to remove the template agent, which makes the synthesis process complicated and easy to introduce impurities

Method used

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  • Preparation method of superparamagnetic hollow ferroferric oxide microspheres
  • Preparation method of superparamagnetic hollow ferroferric oxide microspheres
  • Preparation method of superparamagnetic hollow ferroferric oxide microspheres

Examples

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Embodiment 1

[0027] A method for preparing superparamagnetic hollow ferric oxide microspheres, characterized in that it comprises the following steps: step 1, dissolving ferric nitrate nonahydrate and anhydrous sodium acetate into ethylene glycol, and adding polystyrene sulfonate Sodium acid, stirring to form a mixed solution; step 2, reacting the above mixed solution for a certain period of time under solvothermal conditions, magnetic separation, and post-treatment to obtain superparamagnetic hollow ferric oxide microspheres.

[0028] The above is the core of the present invention, and the superparamagnetic hollow iron ferric oxide microspheres are prepared in one step by using ferric nitrate nonahydrate, anhydrous sodium acetate, ethylene glycol and sodium polystyrene sulfonate as raw materials. The raw materials used in the present invention are easy to obtain and the cost is low, and the hollow iron ferric oxide microspheres are prepared by a one-step method. Paramagnetic properties. ...

Embodiment 2

[0034] A method for preparing superparamagnetic hollow ferric oxide microspheres, characterized in that it comprises the following steps: step 1, dissolving ferric nitrate nonahydrate and anhydrous sodium acetate into ethylene glycol, and adding polystyrene sulfonate Sodium acid, stirring to form a mixed solution; step 2, reacting the above mixed solution for a certain period of time under solvothermal conditions, magnetic separation, and post-treatment to obtain superparamagnetic hollow ferric oxide microspheres.

[0035] Specifically, in step 1, dissolve 2.7g of ferric nitrate nonahydrate in 40mL of ethylene glycol, dissolve 7.2g of anhydrous sodium acetate in 40mL of ethylene glycol, and add the ethylene glycol solution of anhydrous sodium acetate to nitric acid nonahydrate Iron glycol solution, continue to mix and stir evenly to form a mixed solution; dissolve 0.0675g of sodium polystyrene sulfonate in 5mL of water, and add the aqueous solution of sodium polystyrene sulfona...

Embodiment 3

[0039] A preparation method of superparamagnetic hollow iron ferric oxide microspheres, characterized in that it comprises the following steps: step 1, dissolving 2.7g ferric nitrate nonahydrate in 40mL ethylene glycol, dissolving 7.2g anhydrous sodium acetate Add the ethylene glycol solution of anhydrous sodium acetate to the ethylene glycol solution of ferric nitrate nonahydrate in 40mL of ethylene glycol, and continue to mix and stir evenly to form a mixed solution; dissolve 0.54g of sodium polystyrene sulfonate in 2mL of water, and the aqueous solution of sodium polystyrene sulfonate was added to the above mixed solution, and vigorously stirred for 30 to 120 minutes to form a uniform and clear mixed solution, wherein the mass ratio of ferric nitrate nonahydrate to anhydrous sodium acetate was 1:3, the solid-liquid ratio of ferric nitrate nonahydrate and ethylene glycol is 1g: 30mL, the solid-liquid ratio of anhydrous sodium acetate and ethylene glycol is 1g: 11mL; The sodium ...

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Abstract

The invention relates to the field of nano material preparation, and specifically relates to a preparation method of superparamagnetic hollow ferroferric oxide microspheres. The preparation method comprises the following steps of 1, dissolving iron nitrate nonahydrate and sodium acetate anhydrous into ethylene glycol, adding sodium polystyrenesulfonate, and stirring to form a mixed solution; 2, reacting the mixed solution under a solvothermal condition for a certain time, and performing magnetic separation and post-treatment, so as to obtain the superparamagnetic hollow ferroferric oxide microspheres. The preparation method provided by the invention has the advantages that the used materials are easy to obtain, the cost is low, since a one step method is used for preparing the hollow ferroferric oxide microspheres, so that the technology of the preparation method is simple, and the prepared ferroferric oxide microspheres are uniform in particle size, have good dispersity, and showsuperparamagnetic performance, and have wide application prospect.

Description

technical field [0001] The invention relates to the field of preparation of nanometer materials, in particular to a method for preparing superparamagnetic hollow ferric oxide microspheres. Background technique [0002] Nano / micro-scale superparamagnetic hollow Fe3O4 microspheres are widely used in catalysts, nuclear magnetic resonance imaging (MRI), and drug delivery due to their low density, high specific surface area, good permeability, and unique optical, electrical, and surface properties. , biological separation, lithium battery and pollutant separation. At present, the method for preparing hollow nano-ions is mainly the template method, and the template method is generally divided into soft template method and hard template method. However, the high cost and tedious synthesis steps of template methods prevent the scale-up of these methods for large-scale applications. In addition, the template method needs to remove the template agent, which makes the synthesis proce...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G49/08H01F1/00
CPCC01G49/08C01P2002/72C01P2004/03C01P2004/04C01P2004/34C01P2006/42H01F1/0018
Inventor 程琳吴小平李小云李超荣宋昌盛
Owner ZHEJIANG SCI-TECH UNIV
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