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Preparation method for carbon nano tube-graphene composite foam

A graphene composite and graphene foam technology is applied in the field of preparation of nano-composite materials, which can solve the problems of insignificant improvement of material hydrophobicity, cumbersome process, low yield and the like, and achieves cheap raw materials, high growth efficiency, and easy raw materials. the effect

Inactive Publication Date: 2014-04-23
DALIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Using the graphene foam deposited by chemical vapor deposition as the substrate, the chemical vapor deposition process after catalyst deposition successfully realized the preparation of superhydrophobic carbon nanotube-graphene foam, but the method is cumbersome and the yield is extremely low. The possibility of practical application of this foam is limited by the
And by introducing carbon nanotubes in the process of preparing graphene foam by chemical reduction method, graphene-carbon nanotube foam can be obtained efficiently and at low cost, but in this foam, carbon nanotubes are often wrapped by graphene nanosheets Covering, the improvement of the hydrophobicity of the material is not obvious

Method used

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  • Preparation method for carbon nano tube-graphene composite foam
  • Preparation method for carbon nano tube-graphene composite foam
  • Preparation method for carbon nano tube-graphene composite foam

Examples

Experimental program
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Effect test

Embodiment 1

[0034] 0.6 g of ferrocene was ultrasonically dispersed in 40 mL of acetone to obtain a solution of ferrocene in acetone with a concentration of 15 mg / mL. Put the graphene foam prepared by ethylenediamine-assisted reduction into the acetone solution of the above-mentioned ferrocene. The impregnated graphene foam was taken out, placed at room temperature to dry naturally, and after the acetone volatilized completely, the graphene foam loaded with ferrocene was obtained. The graphene foam loaded with ferrocene is placed in a microwave reactor, and the air in the reactor is replaced by argon gas. The microwave reactor was opened, and microwave irradiation treatment was carried out. The power of the microwave reactor was 800 W, and the treatment time was 1 min to obtain carbon nanotube-graphene composite foam. Thermogravimetric analysis showed that the content of carbon nanotubes in the syntactic foam was 32 wt%. figure 2 Shown is a digital photograph of the resulting syntactic ...

Embodiment 2

[0036] 0.75 g of ferrocene was ultrasonically dispersed in 50 mL of acetone to obtain a solution of ferrocene in acetone with a concentration of 15 mg / mL. Put the graphene foam prepared by ethylenediamine-assisted reduction into the acetone solution of the above-mentioned ferrocene. The impregnated graphene foam was taken out, placed at room temperature to dry naturally, and after the acetone volatilized completely, the graphene foam loaded with ferrocene was obtained. The graphene foam loaded with ferrocene is placed in a microwave reactor, and the air in the reactor is replaced by argon gas. The microwave reactor was opened for microwave irradiation treatment. The power of the microwave reactor was 800 W and the treatment time was 5 s to obtain carbon nanotube-graphene composite foam. Thermogravimetric analysis showed that the content of carbon nanotubes in the composite was 8 wt%. Figure 5 Shown is a scanning electron micrograph of the obtained composite foam, from which...

Embodiment 3

[0038] 0.6 g of ferrocene was ultrasonically dispersed in 30 mL of gasoline to obtain a ferrocene gasoline solution with a concentration of 20 mg / mL. Put the graphene foam prepared by ascorbic acid-assisted reduction into the above ferrocene solution. The impregnated graphene foam was taken out, placed at room temperature to dry naturally, and after the gasoline was completely volatilized, a graphene foam loaded with ferrocene was obtained. The ferrocene-loaded graphene foam is placed in a microwave reactor, and the air in the reactor is replaced by nitrogen gas. The microwave reactor was opened for microwave irradiation treatment. The power of the microwave reactor was 800 W and the treatment time was 30 s to obtain carbon nanotube-graphene composite foam. The content of carbon nanotubes in the composite is 42 wt%.

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Abstract

The invention belongs to a preparation method of a nano composite material and particularly relates to the field of a microwave preparation method for a grapheme-based composite material. A preparation method for carbon nano tube-graphene composite foam comprises the following steps: firstly, loading ferrocene on graphene foam; and then carrying out microwave treatment on the graphene foam loaded with the ferrocene and decomposing the ferrocene on the graphene foam by a high temperature which is instantly generated, so as to generate a catalyst and a carbon source to realize carbon nano tube in-situ growth and obtain the carbon nano tube-graphene composite foam. A carbon nano tube in the composite material vertically and epitaxially grows on the surface of a hole wall of the graphene foam; the super-hydrophobic and super-lipophilic surface chemical characteristics are represented; the preparation method has a wide application prospect in the aspects of adsorption, oil-water separation and the like; the method has the characteristics that operation is simple and convenient, cost is low, and industrial production is easily realized, and is an important preparation method for nano carbon materials.

Description

technical field [0001] The invention belongs to the preparation method of nano-composite materials, in particular to the technical field of microwave preparation methods of graphene-based composite materials. Background technique [0002] Graphene foams are a new class of three-dimensional monolithic functional materials. This kind of material has developed pore structure, super large specific surface area and excellent electrical conductivity, and has broad application prospects in many fields such as energy storage, environmental protection and catalysis. Currently reported methods for preparing graphene foams include hydrothermal reduction, chemical reduction, and chemical vapor deposition. Although graphene foams exhibit a series of excellent properties, some properties, especially hydrophobic properties, are not ideal. How to effectively improve the hydrophobic properties of graphene foams has become an important challenge. [0003] One of the important ways to improv...

Claims

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Application Information

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IPC IPC(8): C01B31/04B82Y40/00B82Y30/00C01B32/194
Inventor 赵宗彬胡涵邱介山
Owner DALIAN UNIV OF TECH
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