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A method for preparing graphene and composite materials by sunlight and laser reduction

A composite material and graphene technology, applied in the direction of graphene, nanotechnology for materials and surface science, nanotechnology, etc., can solve limitations and other problems, and achieve the effect of low cost, environmental friendliness and low price

Active Publication Date: 2017-07-25
BEIJING INSTITUTE OF TECHNOLOGYGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The preparation of graphene by photoreduction is an effective, simple and green method for preparing graphene, but the current reduction by light source is limited to the reduction processing of tiny devices, such as the preparation of tiny circuit processing, etc., for graphene-based composite materials Preparation, the use of light sources for reduction preparation is still limited to a limited number of composite materials

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  • A method for preparing graphene and composite materials by sunlight and laser reduction
  • A method for preparing graphene and composite materials by sunlight and laser reduction
  • A method for preparing graphene and composite materials by sunlight and laser reduction

Examples

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Effect test

Embodiment 1

[0067] A method for preparing graphene by sunlight and laser reduction, the method steps are as follows:

[0068] (1) Prepare a 6 mg / mL graphene oxide solution by oxidizing and exfoliating graphite.

[0069] (2) Freezing the 6 mg / mL graphene oxide solution into blocks, and then drying in a freeze dryer to obtain block graphene oxide.

[0070] (3) irradiating the block graphene oxide with a laser with a power of 1W for 1s, the yellow-brown block graphene oxide, such as figure 1 As shown, it becomes a black blocky final product, such as figure 2 shown.

[0071] The final product that present embodiment is made detects:

[0072] Scanning electron microscopy results of image 3 As shown, it shows that its structure is a three-dimensional porous structure, and the specific surface area test result is 508m 2 / g;

[0073] The X-ray powder diffraction test results are as follows: Figure 4 Shown, wherein, the upper curve is the final product test result, and the lower curve is...

Embodiment 2

[0075] A kind of method that sunlight, laser reduction prepare graphene composite material, described method step is as follows:

[0076] (1) A 2 mg / mL graphene oxide solution was prepared by oxidizing and exfoliating graphite.

[0077] (2) 2mg / mL graphene oxide solution and 20mmol / L chloroplatinic acid solution were mixed evenly at a volume ratio of 1:1, frozen into blocks, and then dried in a freeze dryer to obtain block graphene oxide composites .

[0078] (3) The bulk graphene oxide composite material is irradiated with a laser with a power of 1W for 1s, and the yellow-brown bulk graphene oxide composite material becomes a black block-shaped final product.

[0079] The final product that present embodiment is made detects:

[0080] Scanning electron microscope results show that its structure is a three-dimensional porous structure;

[0081] The results of transmission electron microscopy were as Figure 5 As shown, it shows that a large number of platinum nanoparticles...

Embodiment 3

[0084] A kind of method that sunlight, laser reduction prepare graphene composite material, described method step is as follows:

[0085] (1) A 10 mg / mL graphene oxide solution was prepared by oxidizing and exfoliating graphite.

[0086] (2) 10mg / mL graphene oxide solution and 10mmol / L chloroauric acid solution are mixed evenly at a volume ratio of 1:1, frozen into blocks, and then dried in a freeze dryer to obtain block graphene oxide composites .

[0087] (3) The bulk graphene oxide composite material is irradiated with a 1W laser for 1 second, and the bulk graphene oxide composite material becomes the final product.

[0088] The final product that present embodiment is made detects:

[0089] Scanning electron microscope results show that its structure is a three-dimensional porous structure;

[0090] The results of transmission electron microscopy were as Figure 7 As shown, it shows that a large number of gold nanoparticles are loaded on the graphene;

[0091] The X-r...

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Abstract

The invention relates to a method for preparing graphene and composite materials through sunlight and laser reduction, and belongs to the field of functional materials. The method is as follows: the graphene oxide solution is obtained by oxidizing and exfoliating graphite, mixed evenly with the material to be composited to obtain a mixed substance, and the graphene oxide solution or the mixed substance is freeze-dried to obtain block graphene oxide or graphene oxide composite material , focused irradiation with laser light or sunlight, and reduced to bulk graphene or bulk graphene composites. The method is a general method for preparing graphene and its composite materials; the obtained graphene and its composite materials are foamy, and the internal structure is three-dimensional, porous, and has a large specific surface; the raw materials of the method have a wide range of sources, and the price is low. Inexpensive and environmentally friendly, the process is simple and mature, and suitable for large-scale production.

Description

technical field [0001] The invention relates to a method for preparing graphene and composite materials through sunlight and laser reduction, and belongs to the field of functional materials. Background technique [0002] Graphene is a two-dimensional carbon-based material composed of a single layer of atoms. It has large surface area, high electron mobility, good mechanical strength and thermal conductivity, so it has attracted extensive attention in research fields such as energy materials and storage devices. [0003] Graphene composite materials combine other nanostructure materials with graphene through chemical bonds and intermolecular forces. Graphene composite materials include graphene metal composite materials, such as graphene and platinum, gold, silver and other nanoparticle composite materials; graphene metal oxide composite materials, such as graphene and manganese tetraoxide, nickel oxide, iron oxide, etc. Materials; heteroatom doped graphene materials, such ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B32/184C01G45/02C01G53/04C01G51/04C01G21/02C01G49/02C08G73/06C08K3/04B22F9/24B82Y30/00
Inventor 曲良体程虎虎
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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