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A kind of preparation method of graphene

A graphene and graphite technology, applied in chemical instruments and methods, nanotechnology for materials and surface science, carbon compounds, etc. The effects of abundant and uniform pores, simple preparation process and wide source of raw materials

Active Publication Date: 2016-12-21
OCEANS KING LIGHTING SCI&TECH CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These methods currently have some deficiencies, such as complex preparation process, difficulty in preparing graphene with specific morphology, etc. Chinese patents CN 101993056 A, CN 102107868 A, etc. all provide methods for preparing porous graphene, but these methods are too complicated to operate

Method used

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  • A kind of preparation method of graphene

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] A kind of preparation method of graphene, comprises the following steps:

[0020] (1) Add sucrose and graphite oxide to a beaker at a mass ratio of 0.1:1 for mixing, add deionized water, place the beaker in an ultrasonic instrument for 60 minutes, and obtain a concentration of sucrose and graphene oxide with a concentration of 10g / L. mixture;

[0021] (2) Filter the mixed solution, dry the obtained filter residue at 60° C. for 24 hours, take it out and place it on a quartz boat, and move the quartz boat into the reaction furnace;

[0022] (3) Heating the reaction furnace to 300° C., insulated for 20 minutes to react, and after the reaction was completed, naturally cooled to room temperature, and collected the solid product, which was graphene with a porous structure.

[0023] The graphene with the porous structure obtained in this example has a pore diameter of 50-300 nm.

[0024] figure 1 It is the graphene SEM picture that the embodiment 1 of the present invention ...

Embodiment 2

[0026] A kind of preparation method of graphene, comprises the following steps:

[0027] (1) Add glucose and graphite oxide to a beaker at a mass ratio of 0.2:1 for mixing, add deionized water, place the beaker in an ultrasonic instrument for 30 minutes, and obtain a concentration of glucose and graphene oxide with a concentration of 3g / L. mixture;

[0028] (2) Filter the mixed solution, dry the obtained filter residue at 70° C. for 18 hours, take it out and place it on a quartz boat, and move the quartz boat into the reaction furnace;

[0029] (3) Heating the reaction furnace to 450° C., insulated for 30 minutes to react, after the reaction was completed, naturally cooled to room temperature, and collected the solid product, which was graphene with a porous structure.

[0030] The graphene with the porous structure obtained in this example has a pore diameter of 50-500 nm, and a graphene thickness of 1-5 nm.

Embodiment 3

[0032] A kind of preparation method of graphene, comprises the following steps:

[0033] (1) Add fructose and graphite oxide into a beaker at a mass ratio of 0.01:1 for mixing, add deionized water, place the beaker in an ultrasonic instrument for 50 minutes, and obtain fructose and graphene oxide with a concentration of 0.1g / L mixed solution;

[0034] (2) Filter the mixed solution, dry the obtained filter residue at 80° C. for 12 hours, take it out and place it on a quartz boat, and move the quartz boat into the reaction furnace;

[0035] (3) Heating the reaction furnace to 500° C., insulated for 20 minutes to react, after the reaction was finished, naturally cooled to room temperature, and collected the solid product, which was graphene with a porous structure.

[0036] The graphene with the porous structure obtained in this example has a pore diameter of 50-200 nm, and a graphene thickness of 1-5 nm.

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Abstract

The invention provides a preparation method of graphene, comprising the following steps: mixing carbohydrates and graphite oxide at a mass ratio of 0.01 to 0.2:1, adding deionized water, and ultrasonicating for 30 to 60 minutes to obtain carbohydrates and graphite oxide A mixed solution of graphene; filter the mixed solution, and dry the obtained filter residue at 60-80°C for 12-24 hours, then place it in a reaction furnace; heat the reaction furnace to 300-600°C, and keep it warm for 10-30 minutes to react. After the reaction is finished, cool to room temperature, open the reaction furnace, and collect the solid product, which is graphene. The graphene preparation method provided by the invention has a simple preparation process and is easy to realize large-scale industrial production. The prepared graphene has a porous structure, a complete crystal structure, and good performance, and can be applied to sound-absorbing materials, gas adsorption materials, and the like.

Description

technical field [0001] The invention relates to the field of graphene preparation, in particular to a method for preparing graphene with a porous structure. Background technique [0002] Graphene is a two-dimensional carbon atom crystal discovered by Andre K. Geim of the University of Manchester in 2004. Due to its unique structure and photoelectric properties, it has become a research hotspot in the fields of carbon materials, nanotechnology, condensed matter physics and functional materials, attracting many scientific and technological workers. Single-layer graphene has excellent electrical and thermal conductivity and low thermal expansion coefficient, and its theoretical specific surface area is as high as 2630m 2 / g (A Peigney, Ch Laurent, et al. Carbon, 2001, 39, 507), can be used in effect transistors, electrode materials, composite materials, liquid crystal display materials, sensors, etc. At present, the methods for preparing graphene mainly include graphite exfol...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B31/04B82Y30/00C01B32/192
Inventor 周明杰袁新生王要兵
Owner OCEANS KING LIGHTING SCI&TECH CO LTD