Preparation method of ultra-fine diamond-graphene composite material

A composite material and diamond technology, which is applied in the field of preparation of ultrafine diamond-graphene composite materials, can solve the problems of easy accumulation and other problems, and achieve the effects of strong controllability, enhanced mechanical and electrical properties, and stable performance

Active Publication Date: 2017-05-31
HUAQIAO UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Graphene has very high conductivity and mobility, and is an excellent cond

Method used

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  • Preparation method of ultra-fine diamond-graphene composite material
  • Preparation method of ultra-fine diamond-graphene composite material

Examples

Experimental program
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Effect test

Embodiment 1

[0022] The ultrafine diamond with a size of 50nm and the graphene are mixed in water at a mass ratio of 0.6 to form a dispersion, wherein the total concentration of the ultrafine diamond and graphene is 0.2wt%. The dispersion is filtered through a suction filter to form a membrane. The filter paper used for suction filtration is water-based filter paper with a pore size of 0.15 μm. After suction filtration, the filter layer was taken out together with the filter paper, soaked in acetone solution to remove the filter paper, and obtained an ultrafine diamond and graphene mixed film with a film thickness of 1 μm. The film was placed in a quartz tube of a tube furnace and heat-treated at 800° C. for 0.5 h to obtain an ultrafine diamond-graphene composite material. The ultrafine diamond-graphene composite material is used in supercapacitors. figure 2 It is the scanning electron micrograph of the ultrafine diamond-graphene composite material prepared in this embodiment.

Embodiment 2

[0024] The ultrafine diamond with a size of 1 μm and graphene were mixed in water according to the mass ratio of Example 1 to form a dispersion, wherein the total concentration of ultrafine diamond and graphene was 2wt%. The dispersion is filtered through a suction filter to form a membrane. The filter paper used for suction filtration is water-based filter paper with a pore size of 0.8 μm. After suction filtration, take out the filter layer together with the filter paper, soak in acetone solution to remove the filter paper, and obtain an ultrafine diamond and graphene mixed film with a film thickness of 0.1mm. The film was placed in a quartz tube of a tube furnace and heat-treated at 1200°C for 2 hours to obtain an ultrafine diamond-graphene composite material. The ultrafine diamond-graphene composite material is applied to ultrafine abrasive tools.

Embodiment 3

[0026] Ultrafine diamond with a size of 100nm and graphene are mixed in water at a mass ratio of 0.2 to form a dispersion, wherein the total concentration of ultrafine diamond and graphene is 0.5wt%. The dispersion is filtered through a suction filter to form a membrane. The filter paper used for suction filtration is water-based filter paper with a pore size of 0.3 μm. After suction filtration, the filter layer was taken out together with the filter paper, soaked in acetone solution to remove the filter paper, and obtained an ultrafine diamond and graphene mixed film with a film thickness of 100 μm. The film was placed in a quartz tube of a tube furnace and heat-treated at 1000° C. for 1.5 h to obtain an ultrafine diamond-graphene composite material. The ultrafine diamond-graphene composite material is applied to a field emission display.

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Abstract

The invention discloses a preparation method of an ultra-fine diamond-graphene composite material. According to the method, ultra-fine diamond and graphene are mixed to form dispersion liquid; after the dispersion liquid is subjected to suction filtration into a film by a suction filtration device, vacuum heat treatment is performed for 0.5 to 2h at 800 to 1200 DEG C; the ultra-fine diamond-graphene composite material is obtained. The ultra-fine diamond and graphene composite material prepared by the invention has the advantages that the diamond surface is graphitized and forms carbon-carbon bonding with the graphene; the performance is stable. The composite material has very important scientific significance and engineering values for realizing the application of the diamond and the graphene in the fields of superfine material grinding tools, supercapacitors, field emission displays, semiconductor devices and the like.

Description

technical field [0001] The invention belongs to the field of composite materials, in particular to a method for preparing ultrafine diamond-graphene composite materials. Background technique [0002] Ultrafine diamond not only has excellent physical properties such as high hardness, small friction coefficient, wide band gap, high carrier mobility, and low field emission threshold, but also has a large specific surface area and reactivity due to its small size effect. Graphene is a flat film of hexagonal honeycomb lattice, a typical two-dimensional material with a thickness of only one carbon atom. Graphene has very high conductivity and mobility, and is an excellent conductor material, but its easy accumulation affects its practical application. If graphene is combined with ultrafine diamond, the advantages of these two materials can be well utilized to enhance the mechanical and electrical properties, which is conducive to the application of ultrafine diamond and graphene ...

Claims

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Application Information

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IPC IPC(8): C01B32/28
CPCC01P2004/03C01P2004/80
Inventor 陆静薛志萍徐西鹏周菁
Owner HUAQIAO UNIVERSITY
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