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A kind of preparation method of porous graphene-iron trioxide composite material

A technology of ferric oxide and porous graphene, which is applied in the field of nanomaterial manufacturing, can solve the problems of large size of ferric oxide particles and complicated process, and achieve the effect of uniform concentration and continuity.

Active Publication Date: 2016-01-20
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although this method can obtain graphene-ferric oxide three-dimensional foam, the process is relatively complicated. At the same time, the graphene after hydrothermal reduction will still have a certain degree of agglomeration. In addition, the particle size of ferric oxide is relatively large, about 200nm

Method used

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  • A kind of preparation method of porous graphene-iron trioxide composite material
  • A kind of preparation method of porous graphene-iron trioxide composite material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Dissolve 50mg each of the raw materials graphene oxide and ferric chloride in 50ml of deionized water, mix them uniformly by ultrasound, then centrifuge and clean them;

[0020] The obtained product was re-dispersed ultrasonically into 50ml deionized water, then the obtained product was immersed in liquid nitrogen to freeze, and then the obtained solid was subjected to freeze-drying treatment;

[0021] The obtained product was heated to 300° C. and kept for 10 hours in air to obtain a porous graphene-ferric oxide composite material.

[0022] The product was characterized by scanning electron microscopy, and the results were as follows: figure 1 It can be seen that the composite material is a porous structure. The product was characterized by transmission electron microscopy, and the results were as follows: figure 2 As shown, the Fe2O3 nanoparticles were found to be less than 10 nm in size.

Embodiment 2

[0024] Dissolve 10 mg of graphene oxide and 10 mg of ferrous nitrate in 20 ml of deionized water, stir and mix evenly, then centrifuge and clean;

[0025] The obtained product was redispersed into 20ml deionized water, and then the solution was frozen and dried by a refrigeration compressor;

[0026] The obtained product was heated to 500° C. for 10 minutes in oxygen to obtain a porous graphene-ferric oxide composite material.

[0027] The obtained result is similar to Example 1.

Embodiment 3

[0029] Take 1 mg of graphene oxide and 10 mg of ferric sulfate and dissolve them in 20 ml of deionized water, mix them uniformly by ultrasound, then centrifuge and clean them;

[0030] The obtained product was redispersed into 20ml of deionized water, and then subjected to refrigeration compressor freezing and drying;

[0031] The obtained product was heated to 1000° C. in air for 10 seconds to obtain a porous graphene-ferric oxide composite material.

[0032] The obtained result is similar to Example 1.

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Abstract

The invention discloses a preparation method of a porous graphene-ferric oxide composite material, which comprises the following steps: (I) dissolving graphene oxide and iron salt as raw materials into water at a certain mass ratio and uniformly mixing; (II) separating the graphene oxide out of the liquid mixed in the step (I) through centrifugation or suction filtration, and cleaning by use of water or alcohol; (III) re-dispersing the product obtained by the step (II) into the aqueous solution, and performing freeze-drying treatment on the product; (IV) performing heat treatment on the product obtained by the step (III) in air or oxygen to obtain the porous graphene-ferric oxide composite material, wherein the heat treatment temperature is 300-1,000 DEG C, and the heat treatment time is 10 seconds to 10 hours.

Description

technical field [0001] The invention relates to the field of nanomaterial manufacturing, in particular to a method for preparing a porous graphene-ferric oxide composite material. Background technique [0002] Ferric oxide nanomaterials have broad application prospects in lithium-ion battery electrode materials, water purification materials, supercapacitor electrode materials, electromagnetic absorbing materials, and magnetic materials. Graphene is a carbon material with a two-dimensional honeycomb structure formed by a single layer of carbon atoms, and has excellent mechanical and electrical properties. At the same time, graphene has a high specific surface area and can be used as a carrier material for nanomaterials. Graphene-Fe2O3 nanocomposites can suppress the agglomeration of Fe2O3 nanomaterials while maintaining the excellent properties of the material itself, so it has been widely studied. [0003] At present, such materials are mainly in the form of powder or flak...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B31/04C01G49/06B82Y30/00C01B32/184
Inventor 尹奎波陈方韬孙立涛
Owner SOUTHEAST UNIV
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