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Preparation method of foamed graphene-ZnO composite material

A composite material and graphene technology, applied in the field of nanomaterial manufacturing, can solve problems such as complex process and graphene agglomeration

Active Publication Date: 2014-01-01
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The report about the foamed graphene-ZnO composite material has not yet been found, and although the above-mentioned method can obtain the three-dimensional foam of graphene-ferric oxide, the process is relatively complicated
In addition, the graphene after hydrothermal reduction still has a certain degree of agglomeration

Method used

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  • Preparation method of foamed graphene-ZnO composite material
  • Preparation method of foamed graphene-ZnO composite material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Dissolve 30 mg each of the raw materials graphene oxide and zinc fluoride in 60 ml of deionized water, mix them uniformly by ultrasonic waves, then centrifuge and clean them;

[0017] Add the obtained product to 60ml of deionized water, re-disperse it evenly by ultrasonic, and then freeze and dry the solution with a refrigeration compressor;

[0018] The obtained product was heated to 300°C in air for 10 hours to obtain a foamed graphene-ZnO composite material.

[0019] The product was characterized by scanning electron microscopy, and the results were as follows: figure 1 As shown, it can be seen that the composite material is a foam porous structure. The product was characterized by transmission electron microscopy, and the results were as follows: figure 2 As shown, it can be seen that ZnO nanoparticles are embedded on the graphene surface, and the ZnO particle size is about 5 nm.

Embodiment 2

[0021] Dissolve 10 mg of graphene oxide and 20 mg of zinc nitrate in 30 ml of deionized water, stir and mix evenly, then centrifuge and clean;

[0022] The obtained product was redispersed into 30ml of deionized water and stirred evenly, and then the obtained solution was frozen with liquid nitrogen to obtain a solid, which was then transferred to a freeze dryer for freeze drying;

[0023] The obtained product was heated to 500° C. for 10 minutes in oxygen to obtain a foamed graphene-ZnO composite material.

[0024] The obtained sample microscopic characterization results are similar to Example 1.

Embodiment 3

[0026] Take 100mg of graphene oxide and 10mg of zinc acetate and dissolve them in 100ml of deionized water, mix them uniformly by ultrasonic, then centrifuge and clean them;

[0027] The obtained product was redispersed into 100ml deionized water, then subjected to refrigeration compressor freezing and drying;

[0028] The obtained product was heated to 1050° C. for 10 seconds in air to obtain a foamed graphene-ZnO composite material.

[0029] The obtained sample microscopic characterization results are similar to Example 1.

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PUM

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Abstract

The invention discloses a preparation method of a foamed graphene-ZnO composite material. The preparation method comprises the following steps: 1, dissolving graphene oxide and zinc salt as raw materials into water in a certain proportion by mass, and mixing uniformly; 2, separating the graphene oxide from the mixed solution obtained in the step 1 by centrifugal separation or suction filtration, and cleaning by water or ethanol; 3, re-dispersing a product obtained in the step 2 into a water solution, and then carrying out freeze-drying treatment on the product; and 4, carrying out heat treatment on a product obtained in the step 3 in air or oxygen, so as to obtain the foamed graphene-ZnO composite material, wherein the heat treatment temperature is 300-1050 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 preparation method of a foamed graphene-ZnO composite material. Background technique [0002] ZnO nanomaterials have good optical correlation properties and have broad application prospects in solar battery electrode materials and lithium ion battery electrode 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-ZnO nanocomposites can suppress the agglomeration of ZnO nanomaterials while maintaining the excellent properties of the material itself, so it has been widely studied. [0003] At present, such materials are mainly in powder form, and powder materials need to be bonded or compacted during use, which loses th...

Claims

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Application Information

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IPC IPC(8): C01B31/04C01G9/02B82Y30/00C01B32/184
Inventor 孙彬尹奎波孙立涛
Owner SOUTHEAST UNIV
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