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Method for preparing ferroferric oxide/graphene magnetic nano composite material by solvothermal one-step method

A ferric tetroxide, magnetic nanotechnology, applied in the direction of iron oxide/iron hydroxide, nanotechnology, nanotechnology, etc., to achieve the effects of mild reaction conditions, narrow particle size distribution, and convenient operation

Inactive Publication Date: 2015-01-07
NANCHANG HANGKONG UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The preparation process and equipment requirements of these methods are very different, and the morphology and properties of the products are also different. Each method has its own limitations.

Method used

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  • Method for preparing ferroferric oxide/graphene magnetic nano composite material by solvothermal one-step method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] (1) Assemble a 250mL reaction bottle in an ice-water bath, add 23mL of concentrated sulfuric acid, add 2g of natural flake graphite powder and 1g of sodium nitrate under stirring, control the temperature below 4°C for 2 hours, and then gradually add 6g of high manganese Potassium acid, control the reaction temperature not to exceed 20°C, stir the reaction for 1 hour, then raise the temperature to about 35°C and continue stirring for 30 minutes, then slowly add 60mL deionized water, continue stirring for 20 minutes, and add 25mL hydrogen peroxide (30Vol%) to react for 15 minutes. The solution turned bright yellow and was dissolved with 40mL HCl solution (10Vol%), centrifuged and washed with deionized water until the pH was close to neutral, and finally the filter cake was dried in a vacuum oven at 60°C for 8 hours to prepare graphite oxide.

[0021] (2) Add ferric chloride hexahydrate (FeCl 3 ·6H 2 O) 4.0000g, dry graphite oxide 0.2000g, polyvinylpyrrolidone (PVP) 0.025...

Embodiment 2

[0027] (1) Prepare graphite oxide by the traditional Hummers method, assemble a 250mL reaction bottle in an ice-water bath, add 23mL of concentrated sulfuric acid, add 2g of natural flake graphite powder and 1g of sodium nitrate under stirring, and control the temperature below 4°C during the whole process React for 2 hours, then gradually add 6g of potassium permanganate, control the reaction temperature not to exceed 20°C, stir the reaction for 1h, then raise the temperature to about 35°C and continue stirring for 30 minutes, then slowly add 60mL of deionized water, continue stirring for 20 minutes, and add React 25mL hydrogen peroxide (30Vol%) for 15min to make the solution turn bright yellow, and dissolve it with 40mL HCl solution (10Vol%), centrifuge and wash with deionized water until the pH is close to neutral, and finally put the filter cake in a vacuum oven at 60°C Dry 8 hours and prepare graphite oxide;

[0028] (2) Add ferric chloride hexahydrate (FeCl 3 ·6H 2 O) ...

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Abstract

The invention relates to a method for preparing a ferroferric oxide / graphene magnetic nano composite material by a solvothermal one-step method. The method comprises the following steps: by using ferric chloride hexahydrate and graphite oxide as raw materials, sodium bicarbonate as an alkali source, ethylene glycol and water as the solvent and polyvinylpyrrolidone as a surface active agent, dissolving graphite oxide, ferric chloride hexahydrate and polyvinylpyrrolidone into a mixed solvent of ethylene glycol and water, and carrying out ultrasonic treatment to obtain mixed solution A; dissolving sodium bicarbonate into ethylene glycol and carrying out ultrasonic treatment to prepare mixed solution B; after mixing the mixed solution A and B, reacting at 150-200 DEG C and at the pressure of less than 2.5 MPa for 4-12h, and then carrying out aftertreatment to obtain the ferroferric oxide / graphene magnetic nano composite material, wherein the ferroferric oxide particles are uniform, the distribution is narrow and the grain size is 10-30nm. The method is simple and convenient in process, environment-friendly and suitable for batch production.

Description

[0001] technical field [0002] The invention relates to the preparation of a graphene magnetic nanocomposite material, in particular to a method for preparing ferric oxide / graphene magnetic nanocomposite material by a solvothermal one-step method. Background technique [0003] Nano-ferroferric oxide has excellent magnetic characteristics and unique surface effects, small size effects, quantum size effects, and macroscopic quantum tunneling effects, making it widely used in magnetic storage materials, microwave absorption, special coatings, drug targeting guidance, magnetic multi- It has important application prospects in functional composite materials, catalysts and bioengineering. However, due to the large specific surface energy of nanoparticles, they are easy to coagulate and agglomerate to form secondary particles, and lose the characteristics of nanoparticles, which brings great difficulties to the preparation and preservation of nanomaterials. Obtaining nanoparticles...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G49/08C01B31/04B82Y30/00H01F1/10
Inventor 傅毛生
Owner NANCHANG HANGKONG UNIVERSITY
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