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Three-dimensionally ordered macroporous-mesoporous graphene, preparation method and application thereof

A mesoporous graphene, three-dimensional ordering technology, applied in graphene, nano-carbon, etc., can solve the problems of cumbersome process, difficult control, large randomness of sample shape, etc., and achieve simple process, strong controllability and low cost. cheap effect

Active Publication Date: 2017-04-05
SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the three-dimensional graphene materials prepared by the existing research can partially meet the requirements of electrical conductivity and specific surface area, the shape of the sample is random, it is difficult to control, and the process is cumbersome, requiring the use of some flammable and explosive reagents
Therefore, there is room for further improvement in existing methods.
However, there is no report of combining this method with the process of CVD graphene growth to prepare ordered porous graphene.

Method used

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  • Three-dimensionally ordered macroporous-mesoporous graphene, preparation method and application thereof
  • Three-dimensionally ordered macroporous-mesoporous graphene, preparation method and application thereof
  • Three-dimensionally ordered macroporous-mesoporous graphene, preparation method and application thereof

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preparation example Construction

[0036] Polymer spheres can be purchased commercially or can be prepared in-house. In one example, the preparation method of organic polymer template spheres of orderly stacking includes: polymerizing organic monomers in a solvent under the action of an initiator to form polymer polymer spheres; The molecular spheres are separated by orderly packing (such as suction filtration, centrifugation, or natural sedimentation). The particle size of the polymer polymer spheres can be regulated by controlling the reaction conditions, and the specific control method can adopt known techniques in the art.

[0037] The ordered stacked organic polymer template spheres were immersed in a suitable precursor solution. The precursor can be properly selected according to the ceramic to be prepared. In the present invention, as a three-dimensional porous ceramic substrate, oxide ceramics can be used, including various oxides such as metal oxides and silicon oxides, and combinations thereof, wher...

Embodiment 1

[0064] Polymethyl methacrylate (PMMA) was prepared by using methyl methacrylate and hydroxybenzoic acid as raw materials and potassium persulfate as an initiator. in N 2 Protect the atmosphere, mix methyl methacrylate and hydroxybenzoic acid in distilled water, keep stirring, and heat to 70°C in a water bath. After being incubated for 15 minutes, potassium persulfate initiator was added, and after another 40 minutes of incubation, the reaction was terminated; the obtained solution was centrifuged and dried to obtain orderly arranged PMMA templates. The selected centrifugal speed was 2000 rpm, and the drying temperature was 60 ℃;

[0065] The obtained PMMA template was immersed in an aluminum nitrate precursor solution (concentration: 0.5 mol / L), and after soaking, it was separated by suction filtration and dried at room temperature for 24 hours. The dried sample was then heat-treated under an argon protective atmosphere at a temperature of 350° C. for 3 hours. Then heat-tre...

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Abstract

The invention relates to a three-dimensionally ordered macroporous-mesoporous graphene, a preparation method and application thereof. The preparation method includes the steps of: (1) immersing orderly stacked organic polymer template balls into a precursor solution of ceramics and conducting heat treatment after separation and drying to prepare an organic polymer template ball / ceramic composite; (2) removing the organic polymer template balls in the obtained organic polymer template ball / ceramic composite to prepare three-dimensional porous ceramics; (3) growing graphene on the prepared three-dimensional porous ceramic substrate by using chemical vapor deposition to prepare a three-dimensional ceramic composite with graphene grown thereon; and (4) adding the three-dimensional ceramic composite with graphene grown thereon into an etching solution, removing the ceramic template and conducting drying to obtain the three-dimensional ordered macroporous-mesoporous graphene. The invention has the advantages of simple process, low cost, strong controllability, and easy realization of large-scale production.

Description

technical field [0001] The invention relates to a method for preparing three-dimensional ordered macropore and mesoporous graphene powder, in particular to a method for preparing three-dimensional ordered macropore and mesoporous graphene powder with controllable aperture by chemical vapor deposition. Background technique [0002] The efficient and low-cost storage of energy has become a hot issue of human development in the 21st century and has attracted widespread attention worldwide. Supercapacitors have the characteristics of high power density, moderate energy density, safe operation, and long cycle life. Graphene material is a new material with excellent physical and chemical properties, it has good electrical conductivity, and its carrier rate can reach 1.5×10 at room temperature 4 cm 2 / (V·S). At the same time, graphene is the thinnest and strongest material known in the world. Its tensile modulus and intrinsic strength are 1000GPa and 130GPa respectively; it has ...

Claims

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Application Information

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IPC IPC(8): C01B32/186
Inventor 许峰黄富强
Owner SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
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