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Metal oxide graphene composite material and preparation method thereof

A composite material, graphene technology, applied in the direction of graphene, nickel oxide/nickel hydroxide, manganese oxide/manganese hydroxide, etc., can solve the problem of low metal oxide content, unfavorable metal oxide performance, and unfavorable graphene effective ratio. Surface area and other issues to achieve the effect of increasing the content and utilizing the effective specific surface area

Inactive Publication Date: 2017-06-13
HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the inertness of the surface of graphene materials, when preparing graphene-based metal oxide composite materials, metal oxides are generally dispersed on the surface of graphene in the form of particles, so it is difficult for metal oxides to be composited on graphene with a large amount of loading. surface, resulting in a low content of metal oxides in graphene composites, which is not conducive to the performance of metal oxides, and is not conducive to fully utilizing the effective specific surface area of ​​graphene

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] A kind of preparation method of metal oxide graphene composite material, comprises the following steps:

[0016] (1) Evenly disperse 0.1 parts by weight of graphene oxide, 1.0 parts by weight of aniline monomer, and 1.0 parts by weight of citric acid into 100 parts by weight of a solvent. The solvent is a mixed solution of ethanol and water, and its volume ratio is ethanol: Water=1; (2) Add 1.0 parts by weight of ammonium persulfate to the above solution, stir rapidly for 10 minutes, and react at -5°C for 20 hours; (3) Suction filter the reaction product, and then use distilled water, After washing with absolute ethanol, disperse into ammonia solution for dedoping, then re-dope with 1M citric acid solution, and dry the final product at 100°C for 3 hours; (4) Take 1.0 parts by weight of the above product, 1.0 parts by weight Parts of soluble metal iron salt (uniformly mixed by ferric chloride and ferric chloride, the molar ratio is 1:2) are uniformly dispersed in 100 par...

Embodiment 2

[0018] A kind of preparation method of metal oxide graphene composite material, comprises the following steps:

[0019] (1) Evenly disperse 1.0 parts by weight of graphene oxide, 0.1 parts by weight of mixed monomers of aniline and o-toluidine, and 0.1 parts by weight of sulfuric acid into 50 parts by weight of a solvent. The solvent is a mixed solution of ethanol and water. The ratio is ethanol: water = 4 (2) Add 0.1 parts by weight of potassium persulfate to the above solution, stir rapidly for 10 minutes, and react at 0°C for 5 hours; (3) Suction filter the reaction product, and then successively use After washing with distilled water and absolute ethanol, disperse in ammonia solution for dedoping, then re-dope with 1M citric acid solution, and dry the final product at 60°C for 5 hours; (4) Take 0.1 parts by weight of the above product, 0.1 part by weight of soluble metal salt (ferric nitrate and manganese nitrate, uniformly mixed in a molar ratio of 2:1) is uniformly dispe...

Embodiment 3

[0021] A kind of preparation method of metal oxide graphene composite material, comprises the following steps:

[0022] (1) Evenly disperse 1.0 parts by weight of graphene oxide, 1.0 parts by weight of aniline monomer, and 1.0 parts by weight of inorganic acid into 100 parts by weight of a solvent. The solvent is a mixed solution of ethanol and water, and its volume ratio is ethanol: Water=2; (2) Add 1.0 parts by weight of ammonium persulfate to the above solution, stir rapidly for 5 minutes, and react at ~5°C for 20 hours; (3) Suction filter the reaction product, and then use distilled water, After washing with absolute ethanol, disperse into ammonia solution for dedoping, then re-dope with 1M tartaric acid solution, and dry the final product at 80°C for 3 hours; (4) Take 0.5 parts by weight of the above product, 0.5 parts by weight Soluble metal salt (consisting of ferric nitrate and nickel nitrate, uniformly mixed at a molar ratio of 2:1) is uniformly dispersed in 100 parts...

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Abstract

The invention discloses a method for preparing a metal oxide graphene composite material. The method comprises the following steps: uniformly dispersing graphene oxide, aniline organic monomers and inorganic acids into an ethanol-containing aqueous solution; initiating organic monomer polymerization, de-doping in ammonia water, and doping by using binary or ternary organic carboxylic acid; adding a soluble metal salt, promoting metal ions to precipitate under the alkaline concentrated ammonia and heating conditions so as to produce metal oxides; and finally obtaining the metal oxide graphene composite material. According to the method, a conductive polymer is introduced onto a graphene sheet layer, then organic acids with metal ion chelating properties are doped, the metal ions are promoted to be enriched on the graphene surface, and then the metal oxides produced in the alkaline concentrated ammonia environment are compounded on the graphene, so that the metal oxide graphene composite material with high capacity is obtained.

Description

technical field [0001] The invention relates to the technical field of graphene composite materials, in particular to a metal oxide graphene composite material and a preparation method thereof. Background technique [0002] Graphene is a new type of two-dimensional (2D) carbon material composed of carbon atoms arranged in a hexagonal shape. It is the thinnest material known so far. The thickness of single-layer graphene is only 0.34 nm, and it has extremely strong conductivity (charge mobility can reach 200,000 cm 2 V -1 the s -1 ); super high strength (Young's modulus up to 1100 GPa); good thermal conductivity (thermal conductivity 5300WmK -1 ) and large specific surface area (theoretical specific surface area is 2630 m 2 g -1 ), making graphene materials have a wide range of uses in the field of composite material synthesis. Metal oxides have many unique properties, such as magnetic properties, electrochemical properties, catalytic properties, etc. Combining metal ox...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/184C01G49/02C01G45/02C01G53/04
CPCC01G49/02C01G45/02C01G53/04C01P2004/80
Inventor 孙俊陈林王化田兴友
Owner HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI