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Preparation method of large-area and continuous graphen/zinc oxide composite structure

A composite structure, graphene technology, applied in zinc oxide/zinc hydroxide and other directions, can solve the problem of not forming three-dimensional space composite, and achieve the effects of low equipment requirements, strong process repeatability, and good process parameters

Active Publication Date: 2010-10-13
如东文园投资开发有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] But in terms of zinc oxide nanostructures, there is now a problem: the preparation process of zinc oxide nanostructures with a large area of ​​more than 1 square centimeter, uniform, and thickness control is still a challenge
[0008] In summary, there is no large-scale continuous ZnO nanostructure that can be realized on any substrate, and the composite of graphene and ZnO is only limited to the surface of a single graphene, and there is no three-dimensional composite.

Method used

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  • Preparation method of large-area and continuous graphen/zinc oxide composite structure
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  • Preparation method of large-area and continuous graphen/zinc oxide composite structure

Examples

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Embodiment 1

[0025] Preparation of graphene oxide: Using the improved Hummer method, take 98% concentrated sulfuric acid, cool at low temperature, add a certain amount of natural flake graphite, NaNO 3 and KMnO 4 , control the temperature of the reaction solution at 0-10°C, stir the reaction for 5 hours, then carry out the high-temperature reaction, control the temperature of the reaction solution within 100°C, and continue stirring for 30 minutes. Dilute the reaction solution with deionized water and add appropriate amount of H 2 o 2 , filtered while hot, fully washed with deionized water until there was no SO in the filtrate 4 2- . Weigh 0.0030 g of graphite oxide into a beaker, add deionized water to make a 100 ml solution, and then ultrasonically disperse the solution for 60 minutes to obtain a graphene oxide solution.

[0026] Weigh 0.1910g of zinc nitrate and 0.1518g of hexamethylenetetramine into the solution, continue ultrasonication for 10 minutes, and then put the solution i...

Embodiment 2

[0028] Embodiment two: the preparation of graphene: Utilize the improved Staudenmaier method to add natural flake graphite in the mixed solution of 98% concentrated sulfuric acid and nitric acid, stir and add potassium nitrate, control the reaction liquid temperature 0-10 ℃, stir reactant 24 hours Obtain graphite oxide. Dilute the reactant, filter, and wash thoroughly with deionized water until there is no SO in the filtrate 4 2- , and then dried, ground and sieved, and rapidly heat-treated at 1100°C to obtain single-layer or several-layer graphene flakes.

[0029] Weigh 0.012g of graphene into a beaker, add deionized water to make a 100ml solution, and then ultrasonically disperse the solution at 20°C for 30 minutes. Weigh 0.1910g of zinc acetate, pour 0.1518g of hexamethylenetetramine into the solution, and continue ultrasonication for 30 minutes, wherein the molar ratio of graphene to zinc ions is about 1:1. Then put the solution in an oven at 70°C and react for 1 hour t...

Embodiment 3

[0030] Embodiment three: the preparation of graphene: Utilize the improved Staudenmaier method to add natural flake graphite in the mixed solution of 98% concentrated sulfuric acid and nitric acid, stir and add potassium nitrate, control the reaction liquid temperature 0-10 ℃, stir reactant 24 hours Obtain graphite oxide. Dilute the reactant, filter, and wash thoroughly with deionized water until there is no SO in the filtrate 4 2- , and then dried, ground and sieved, and rapidly heat-treated at 1100°C to obtain single-layer or several-layer graphene flakes.

[0031] Weigh 0.012g of graphene into a beaker, add deionized water to make a 1000ml solution, add 0.5ml of ammonia water dispersant, and then ultrasonically disperse the solution for 1 hour. Weigh 2.989g of zinc nitrate and 1.407g of hexamethylenetetramine into the solution, and continue ultrasonication for 1 hour. The molar ratio of graphene to zinc ions is about 1:15. Then the solution was put into an oven at 90° C...

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Abstract

The invention relates to a method for preparing continuous graphen / zinc oxide composite structure in large area, which belongs to the preparation field of the novel nanometer material, and is applicable to the fields such as sensor, solar panel, novel nanometer part and the like. The method comprises the following three steps that: first step: uniformly dispersing graphen or graphene oxide in liquid phase; second step: utilizing a hydrothermal process to ensure the zinc oxide nanometer structure and the graphen two-dimensional sheet to form a continuous structure in a three-dimensional space; third step: transferring the prepared composite structure onto a substrate to be dried. The method has simple process and low device requirement since the composite structure is synthesized in the solution; the process repeatability is strong, and the process parameter can be well controlled; the prepared graphen / zinc oxide composite structure has large area and is continuous, the generated zinc oxide nanometer sheet layer, nanometer particle and nanometer line are connected with each other and intersected with each other under the effect of the graphen so as to form a continuous porous structure in the three-dimensional space.

Description

technical field [0001] The invention relates to a method for preparing a large-area continuous graphene / zinc oxide composite structure, which belongs to the field of new nanometer materials and material preparation, and its application fields include sensors, solar cells and new nanometer devices. Background technique [0002] Nanotechnology is a priority development field in the 21st century, and nanodevices assembled from nanomaterials will bring about revolutionary changes in various fields of science and technology. In the basic nanostructure unit used to assemble nanodevices, two materials with strong functions and unique structures will be indispensable. One is zinc oxide, and the other is graphene, a two-dimensional crystal of a single atomic layer of graphite. Both materials possess unique optoelectronic properties, with the former possessing rich low-dimensional structures and the latter possessing excellent electrical, mechanical, and thermal conductivity properti...

Claims

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Application Information

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IPC IPC(8): C01B31/04C01G9/02
Inventor 丁古巧丁建宁袁宁一刘跃斌
Owner 如东文园投资开发有限公司
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