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Graphene-metallic oxide nano-particle three-dimensional porous composite material

A nanoparticle, three-dimensional porous technology, applied in the field of nanomaterials manufacturing, can solve the problems of high equipment requirements, high energy consumption, unfavorable practical application, etc., achieve uniform concentration, simple method, and increase the effect of application range

Inactive Publication Date: 2013-12-25
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the preparation methods of graphene-metal oxide composite materials mainly focus on the hydrothermal synthesis method, which consumes a lot of energy and requires high equipment requirements, which is not conducive to large-scale industrial production
On the other hand, the currently obtained graphene-metal oxide composites are mainly in powder form, which is not conducive to practical application.

Method used

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  • Graphene-metallic oxide nano-particle three-dimensional porous composite material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Take 50mg of graphene oxide and 80mg of copper nitrate as raw materials, dissolve them in 100ml of deionized water, and mix them evenly by ultrasonic;

[0021] The obtained product is frozen by a refrigeration compressor to obtain a solid, and then dried and dehydrated under low-temperature negative pressure;

[0022] The obtained product was heated to 200° C. and kept for 10 hours in the air to obtain a three-dimensional porous composite material of graphene-copper oxide nanoparticles.

[0023] The product was characterized by transmission electron microscopy, and the results were as follows: figure 1 shown. The product was characterized by scanning electron microscopy, and the results were as follows: figure 2 It can be seen that the composite material is a porous structure.

Embodiment 2

[0025] Dissolve 20 mg of graphene oxide and 50 mg of cobalt nitrate in 20 ml of deionized water, and mix evenly by stirring;

[0026] Immerse the obtained product in liquid nitrogen and freeze it into a solid, and then carry out low-temperature negative pressure dehydration treatment in a freeze dryer;

[0027] The obtained product was heated to 800° C. in hydrogen for 30 minutes to obtain a three-dimensional porous composite material of graphene-cobalt tetraoxide nanoparticles.

[0028] The product was characterized by transmission electron microscopy, and the results were as follows: image 3 shown.

Embodiment 3

[0030] Dissolve 10mg of graphene oxide and 100mg of zinc nitrate in 50ml of deionized water, and mix them uniformly by ultrasonic;

[0031] The obtained product is subjected to refrigerating compressor freezing and drying;

[0032] The obtained product was heated to 1100° C. for 10 seconds in nitrogen to obtain a three-dimensional porous composite material of graphene-zinc oxide nanoparticles.

[0033] The obtained result is similar to Example 1.

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Abstract

The invention discloses a method for preparing a graphene-metallic oxide nano-particle three-dimensional porous composite material. The method comprises the steps of (1) dissolving raw materials, namely graphene oxide and metal salt, into water, and mixing uniformly; (2) carrying out freeze drying treatment on a product; (3) carrying out heat treatment on the product obtained in the step (2) in a certain atmosphere or vacuum, thereby obtaining the graphene-metallic oxide nano-particle three-dimensional porous composite material, wherein the temperature of the heat treatment is 200-1,100 DEG C, and the time for the heat treatment is 10 seconds to 10 hours.

Description

technical field [0001] The invention relates to the field of nanomaterial manufacturing, in particular to a three-dimensional porous composite material of graphene-metal oxide nanoparticles. Background technique [0002] Metal oxides play an important role. For example, Sangu tetroxide can be used for low-temperature catalytic oxidation of CO and electrode materials for lithium-ion batteries. Zinc oxide is an important photoelectric material, and tin dioxide is an important gas-sensing material. Metal oxide nanomaterials have a high specific surface area and are more active than bulk materials, so they have been extensively studied. 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. Combining metal oxide nanoparticles with graphene can inhi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B31/04B82Y30/00C01B32/184
Inventor 尹奎波季静孙立涛
Owner SOUTHEAST UNIV
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