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Preparation method of graphene

A technology of graphene and expanded graphite, which is applied in the field of graphene preparation, can solve problems such as potential safety hazards and surface damage, and achieve the effect of avoiding the impact of peeling damage

Inactive Publication Date: 2019-02-26
珠海市扬程玻璃制品有限公司
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Problems solved by technology

[0003] The technical problem to be solved by the present invention is to provide a method for preparing graphene, which solves the huge safety hazards brought in the current graphene oxide production process and the damage to its surface during the peeling graphene process.

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  • Preparation method of graphene

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Embodiment Construction

[0020] The purpose of this invention is to propose a kind of method for preparing graphene, adopts low-temperature redox method to prepare graphene. In order to achieve this purpose, the following synthesis method uses expanded graphite material as raw material, and a specially designed three-necked flask ice-bath reactor is used in the synthesis process. The method of this graphene oxidation reaction comprises the following steps:

[0021] (1) Weigh the expanded graphite according to the proportion and place it in the right cylindrical beaker, put the beaker into a 1000w, 800°C microwave oven and heat it for 10 seconds. Microwave heating expands the graphite, resulting in worm-like graphite powder.

[0022] (2) The mass fraction of injecting 50ml is the concentrated sulfuric acid of 98% and 1g expanded graphite in the there-necked flask of volume 500ml. Then put the three-necked flask into an ice bath and start the mechanical stirring to 120 rpm. When the temperature of th...

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Abstract

The invention discloses a preparation method of graphene. The method comprises the following steps: using novel expanded graphite as a raw material, oxidizing the expanded graphite at low temperatureof 45 DEG C by using a strong oxidization solution, and then reducing graphene oxide at the temperature of 200 DEG C, cooling to collect high-quality graphene. The expanded graphite is taken as the raw material in the invention, so that an expanded graphite sheet provided with an expanded graphite layer is beneficial to infiltration of an acid solution and the subsequent oxidation reaction. The synthesis process uses strong acid and performs a redox reaction at low temperature, and an ultrasonic stripping process is eliminated, so that the prepared graphene oxide has a large size, and the production of conductive graphene is facilitated.

Description

technical field [0001] The invention relates to the technical field of new materials, in particular to a method for preparing graphene. Background technique [0002] Graphene is a two-dimensional carbon atom nanocrystal discovered by British scientist Andre K. Geim (Andre K. Geim) and others in 2004. Due to its excellent electrical properties, unique structure and optoelectronic properties, graphene has many applications, including transparent electrodes, lithium batteries, effect transistors and so on. With the deepening of graphene research, high-quality graphene is entering the industrial mass production stage from the laboratory research stage. However, the current main liquid-phase exfoliation methods often require ultrasonic waves to exfoliate graphene. During the exfoliation process, ultrasonic waves will inevitably cause a large number of defects on the surface of graphene. In addition, the traditional oxidation method uses strong acid, high temperature, high press...

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Application Information

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IPC IPC(8): C01B32/19
CPCC01B32/19
Inventor 卓志坚
Owner 珠海市扬程玻璃制品有限公司
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