Unlock instant, AI-driven research and patent intelligence for your innovation.

High-efficiency easy-control graphene preparation method

A graphene and graphene suspension technology, which is applied in the field of efficient and easy-to-control graphene preparation, can solve problems such as undiscovered graphene and lack of carbon atoms, and achieve the effects of shortening reaction time, reducing energy consumption, and ensuring safety

Inactive Publication Date: 2015-05-20
QINGDAO WEITENG GRAPHITE
View PDF0 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The structure of graphene is very stable. So far, researchers have not found any missing carbon atoms in graphene

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] A kind of preparation method of efficient easy-to-control graphene, is characterized in that, described preparation method comprises the steps:

[0019] (1) Graphite oxide and anhydrous tetrahydrofuran were prepared into a suspension at a ratio of 1mg:1.5mL, and a yellowish-brown transparent graphene oxide suspension with a mass percent concentration of 0.06 wt% was obtained after ultrasonication in a cell pulverizer for 35 minutes;

[0020] (2) The reaction system is filled with methane with a flow rate of 300 sccm and hydrogen with a flow rate of 200 sccm at a volume ratio of 1:10, and the control pressure is 1.01×10 5 Pascal, heat up to 900°C and keep for 35min;

[0021] (3) Use ammonia water to adjust the pH of the graphene oxide suspension to 8-9, add dropwise the reducing agent composed of acetone oxime and methyl ethyl ketone oxime with a mass ratio of 1:0.3, which is twice the molar amount of oxygen in graphite oxide, in The dropwise addition was completed with...

Embodiment 2

[0024] A kind of preparation method of efficient easy-to-control graphene, is characterized in that, described preparation method comprises the steps:

[0025] (1) Graphite oxide and anhydrous tetrahydrofuran were prepared into a suspension at a ratio of 1mg:1.5mL, and a yellowish-brown transparent graphene oxide suspension with a mass percentage concentration of 0.07 wt% was obtained after ultrasonication in a cell pulverizer for 35 minutes;

[0026] (2) Fill the reaction system with ethanol with a flow rate of 300 sccm and hydrogen with a flow rate of 200 sccm at a volume ratio of 1:10, and control the pressure at 1.01×10 5 Pascal, heat up to 1000°C and keep for 25min;

[0027] (3) Use ammonia water to adjust the pH of the graphene oxide suspension to 8-9, add dropwise the reducing agent composed of acetone oxime and methyl ethyl ketone oxime with a mass ratio of 1:0.3, which is twice the molar amount of oxygen in graphite oxide, in The dropwise addition was completed withi...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a high-efficiency easy-control graphene preparation method, and is characterized in that the preparation method comprises the following steps: (1) preparing a graphene oxide suspension from graphite oxide and anhydrous tetrahydrofuran; (2) filling a reaction system with a carbon source and hydrogen gas; (3) adjusting the pH to 8-9, dropwise adding a reducing agent, and carrying out a reaction to obtain reduced graphite oxide; and (4) on a silicon dioxide coated silicon wafer, carrying out a reaction on the silicon wafer by using a chemical vapor phase deposition method, cooling to the room temperature, and thus obtaining graphene. With adopting of the lower-toxicity oximino reducing agent, the obtained graphene is monolayer and also can be multi-layer, pollution on graphene cannot be caused, and the preparation method can be compatible with conventional silicon industries; and the preparation process is simple, energy consumption is low, the preparation security is ensured, and the required graphene can be obtained in a quite short time and is suitable for mass production.

Description

technical field [0001] The invention belongs to the technical field of graphene preparation, in particular to a method for preparing highly efficient and easy-to-control graphene. Background technique [0002] The structure of graphene is very stable. So far, researchers have not found any missing carbon atoms in graphene. The connection between each carbon atom in graphene is very flexible. When an external mechanical force is applied, the surface of the carbon atom bends and deforms, so that the carbon atoms do not need to be rearranged to adapt to the external force, and the structure remains stable. This stable lattice structure gives carbon atoms excellent electrical conductivity. Electrons in graphene move through their orbits without being scattered by lattice defects or the introduction of foreign atoms. Because the interatomic force is very strong, at room temperature, even if the surrounding carbon atoms collide, the electrons in graphene are disturbed very littl...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): C01B31/04
Inventor 陶岩华
Owner QINGDAO WEITENG GRAPHITE