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Preparation method of three-dimensional graphene or composite system thereof

A graphene, three-dimensional technology, which is applied in the field of preparation of high-quality three-dimensional graphene or its composite system, can solve the problems of limited macro-scale preparation and low graphene bulk density, and achieve the effect of mass preparation and high density

Active Publication Date: 2013-07-24
SUZHOU INST OF NANO TECH & NANO BIONICS CHINESE ACEDEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, nickel foam has a network of pores of hundreds of microns, and the volume density of graphene grown on this template is very low, which limits the requirements for its macro-fabrication.

Method used

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  • Preparation method of three-dimensional graphene or composite system thereof
  • Preparation method of three-dimensional graphene or composite system thereof
  • Preparation method of three-dimensional graphene or composite system thereof

Examples

Experimental program
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preparation example Construction

[0030] Furthermore, as one of the feasible specific embodiments, the preparation method of the present invention may include:

[0031] Take transition metal element, oxide, salt or its hydrate as raw material (ie, precursor), heat and dry the transition salt hydrate or microwave heating to remove crystal water to obtain anhydrous transition metal salt or fill the above precursors In the macroporous foam metal template, reduction is performed in a high temperature environment and an appropriate atmosphere environment, and finally a three-dimensional crosslinked metal catalyst template is obtained. Then, high-quality three-dimensional graphene powder is prepared by chemical vapor deposition, which forms a composite system with metal particles, metal oxides and polymers.

[0032] The three-dimensional graphene obtained by the invention has the characteristics of good electrical conductivity, large specific surface area and high density. The three-dimensional graphene and its composite...

Embodiment 1

[0035] Example 1: Add 5 g of copper powder to polymethyl methacrylate (PMMA: 4%), put the sample in a quartz tube, and ventilate argon for 15 minutes. The tube furnace was raised to 900°C, and the atmosphere environment was: hydrogen: 200 sccm, argon: 100 sccm; the pressure was maintained at: 10 torr. After the growth is complete, argon gas is applied to 200 sccm until the quartz tube cools. Put the grown sample into 1M FeCl 3 / 0.1M HCl solution for etching to obtain three-dimensional graphene.

Embodiment 2

[0036] Example 2: Add 5 g of nickel powder to polymethyl methacrylate (PMMA: 4%), put the sample in a quartz tube, and ventilate argon for 15 minutes. The tube furnace was raised to 900°C, and the atmosphere environment was: hydrogen: 200 sccm, argon: 100 sccm; the pressure was maintained at: 10 torr. After the growth is complete, let argon gas flow 200sccm until the quartz tube cools. Put the grown sample into 1M FeCl 3 / 0.1M HCl solution for etching to obtain three-dimensional graphene.

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Abstract

The invention discloses a preparation method of three-dimensional graphene or a composite system thereof. The preparation method comprises the steps of: by taking a transition metal elementary substance and / or a compound containing a transition metal element as raw materials, preparing a three-dimensional porous metal catalyst template through high-temperature reduction; growing the three-dimensional graphene by utilizing a chemical vapor phase deposition method to obtain the three-dimensional graphene with a catalyst framework; furthermore, etching the three-dimensional graphene with the catalyst framework to obtain three-dimensional graphene powder; and furthermore, compositing the three-dimensional graphene powder with metal, a macromolecular material, a biomolecular material and the like to form a composite material system. The preparation method is simple in technique, capable of fast and massively preparing high-quality and high-density three-dimensional graphene or composite material thereof, and has wide application prospects on the aspects of water treatment, biomedicines, energy generation and conversion and energy accumulation devices, static resistance, thermal management, heat conduction and dissipation, sensors, electromagnetic shielding, wave absorption, catalysis and the like.

Description

technical field [0001] The invention relates to a preparation method of a graphene material, in particular to a preparation method of a high-quality three-dimensional graphene or a composite system thereof. Background technique [0002] Graphene is a single layer of carbon atoms with sp 2 Honeycomb-like two-dimensional crystals formed by stacking. Graphene has a large specific surface area and excellent electrical, thermal and mechanical properties. Since the discovery of graphene, a variety of preparation methods have been developed, including mechanical exfoliation, SiC or metal single crystal surface epitaxial growth, chemical oxidation exfoliation, intercalation exfoliation, and chemical vapor deposition (CVD) methods. Among them, the most potential methods are chemical oxidation stripping method and CVD method. Through the chemical oxidation exfoliation method, people have prepared paper-like graphene materials, graphene flexible transparent conductive films and thre...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B31/04C01B32/186
Inventor 刘立伟李伟伟高嵩吴丽琼邱胜强陈明亮廖书田龚佑品
Owner SUZHOU INST OF NANO TECH & NANO BIONICS CHINESE ACEDEMY OF SCI
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