Graphene and preparation method thereof

A graphene and reaction technology, applied in the field of graphene and its preparation, can solve the problems of small number of graphene deposits, large catalyst size, low catalytic efficiency, etc., and achieve the effects of reducing energy consumption, simplifying the process, and high yield

Active Publication Date: 2015-08-19
SHENZHEN DYNANONIC +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The method has a simple process and solves the problems of the existing CVD deposition technology that the catalyst is placed statically and the number of graphene deposition is small, the size of the catalyst is large and the catalytic efficiency is not high.

Method used

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  • Graphene and preparation method thereof
  • Graphene and preparation method thereof
  • Graphene and preparation method thereof

Examples

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preparation example Construction

[0059] See figure 1 , figure 1 Be the preparation method flowchart of graphene among the present invention, comprise the following steps:

[0060] S01, taking at least one of nano-metal powder and nano-metal oxide powder as a nano-catalyst loaded on the surface of the reaction deposition component;

[0061] S02. Put the reactive deposition component into the cavity of the chemical vapor deposition reactor and connect it to the inner wall of the cavity, the reactive deposition component is used to deposit the graphene generated by the reaction in a rotating state;

[0062] S03. Pass protective gas into the cavity of the chemical vapor deposition reactor, heat the reactive deposition part, and apply a driving force to the reactive deposition part at the same time to make the reactive deposition part rotate at a speed of 10-200r / min Rotating, during the rotation, the rotating surface of the reaction deposition component is perpendicular to the length direction of the reaction d...

Embodiment 1

[0077] A kind of preparation method of graphene, comprises the following steps:

[0078] (1) Preparation of nano-copper catalyst: Dissolve 4g of copper oxide in 20mL of dilute nitric acid, then add 2g of citric acid and 1g of oxalic acid, stir fully and drop in 1mL of hydrazine hydrate, and place the resulting mixed solution in In the muffle furnace, nitrogen gas is introduced, CO is introduced after the temperature is raised to 220°C, where V 氮气 :V CO =8:2, constant temperature 2h obtains the nano-metal copper powder that average particle diameter is 50nm, i.e. nano-copper catalyst;

[0079] The above-mentioned nano-copper powder is used as a nano-catalyst to be loaded on the surface of the reactive deposition component, wherein the load is adhered to the reactive deposition component through a high-temperature resistant epoxy resin, and the material of the reactive deposition component is a nickel-titanium superalloy;

[0080] (2) Put the reactive deposition component into...

Embodiment 2

[0087] A kind of preparation method of graphene, comprises the following steps:

[0088] (1) Add 10mL butyl titanate to 10mL deionized water, add 2g of tartaric acid after stirring, then drop in 2-3 drops of nitric acid to adjust pH2 powder;

[0089] Take the above nano-TiO 2 The powder is loaded on the surface of the reactive deposition component as a nano catalyst, wherein the loading is nano TiO 2 The catalyst is adhered to the reaction deposition part through aluminosilicate, and the material of the reaction deposition part is tungsten carbide;

[0090] (2) putting the reactive deposition component into the cavity of the chemical vapor deposition reactor and connecting it with the inner wall of the cavity, the reactive deposition component is used to deposit the graphene generated by the reaction in a rotating state;

[0091] (3) Feed nitrogen into the chamber of the chemical vapor deposition reactor, the flow rate of nitrogen is 200 sccm, heat the reaction deposition pa...

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Abstract

The invention provides a preparation method of graphene. According to the method, a nano-scale metal and/or metal oxide catalyst is attached on a rotatable reaction deposition part, a carbon source which can be decomposed into carbon and hydrogen is introduced, and the carbon source is cracked into the graphene under the action of the nano-scale catalyst; as the reaction deposition part is rotatable, the carbon source is in three-dimensional and dynamic contact with the catalyst, and more graphene can be deposited; in addition, the catalytic efficiency of the nano-scale catalyst to the carbon source is higher, and the preparation of the high-quality graphene even in thickness and controllable in number of layers can be effectively realized. The method is simple in process; the problems of less deposited graphene, large catalyst scale and low catalytic efficiency due to the static placement of the catalyst in the existing chemical vapor deposition technology are solved. The invention also provides a graphene; the layers of the graphene are bent to form a hollow cloth bag shape; the graphene of the structure has excellent hydrogen storage and lithium storage functions.

Description

technical field [0001] The invention relates to the technical field of graphene preparation, in particular to a graphene and a preparation method thereof. Background technique [0002] Graphene is a two-dimensional periodic honeycomb lattice structure composed of carbon six-membered rings. It is the basic unit for constructing other dimensional carbon-based materials. The unique crystal structure of graphene makes it have excellent optical, electrical and mechanical properties. Therefore, it has been widely used in fields such as field emission materials, gas sensors, and energy storage. [0003] At present, the methods for preparing graphene mainly include graphite exfoliation, chemical redox method, ultrasonic exfoliation method, etc. However, the shapes of graphene prepared by these methods are basically irregular, the number of layers is indefinite, and the morphology is difficult to control. In addition, chemical vapor deposition (CVD) can prepare large quantities of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B31/04
Inventor 孔令涌尚伟丽方东升
Owner SHENZHEN DYNANONIC
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