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Preparation method for graphene oxide

A graphene and graphene technology, which is applied in the field of graphene oxide preparation, can solve the problems of generating harmful gas, complicated processes, and the like, and achieves the effects of good dispersion and simple preparation process.

Inactive Publication Date: 2018-01-19
SHENZHEN UNIV
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Problems solved by technology

[0005] The invention provides a preparation method of graphene oxide, which aims to solve the problems of the existing chemical preparation method, such as the generation of harmful gas, many process factors, and the complicated process of the preparation process, as well as the existing electrochemical preparation method. method, residual strong acids or sulfates cause corrosion and complicate the purification process

Method used

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preparation example Construction

[0022] The embodiment of the present invention provides a kind of preparation method of graphene oxide, and this method mainly comprises the following steps:

[0023] The carbon-containing carbon source is used as the anode, and the conductive material is placed in the electrolyte water as the cathode;

[0024] The solution of graphene oxide is obtained by applying direct current to the anode and the cathode for more than 3 minutes;

[0025] The graphene oxide solution is dried to obtain graphene oxide.

[0026] The invention provides a kind of preparation method of graphene oxide, such as figure 1 as shown, figure 1 In order to prepare graphene oxide devices, water is used as the electrolyte. When direct current is applied, water molecules are ionized into hydrogen ions and hydroxide ions. Under the action of an external electric field, the negatively charged hydroxide ions move to the anode and enter the Hydroxide ions in the anode will pull the graphite layer from the an...

Embodiment 1

[0033] will be 10cm 2 graphite as anode, 15cm 2 The stainless steel sheet is placed in the tap water of the electrolyte as the cathode, and the distance between the graphite and the stainless steel sheet is 5cm;

[0034] Connect the graphite to the positive pole of the DC power supply, connect the stainless steel sheet to the negative pole of the DC power supply, and obtain a solution of graphene oxide under the conditions of a DC current of 4, 20 and 30 milliamperes and a power-on time of 5 days;

[0035] The graphene oxide solution is filtered and dried to obtain graphene oxide.

[0036] Among them, please refer to figure 2 , image 3 , Figure 4 , Figure 5 and Figure 6, figure 2 For the solution of the graphene oxide that embodiment 1 prepares, to figure 2 After filtering and drying the graphene oxide solution in the solution, scanning electron microscopy, transmission electron microscopy and ultraviolet spectrum testing are carried out, such as Figure 3 to F...

Embodiment 2

[0038] will be 150cm 2 CFRP cloth as anode, 15cm 2 The stainless steel sheet is placed in the tap water of the electrolyte as the cathode, and the distance between the carbon fiber and the graphite is 5cm;

[0039] The CFRP cloth is connected to the positive pole of the DC power supply, and the stainless steel sheet is connected to the negative pole of the DC power supply. Under the condition of a DC current of 10 mA and a power-on time of 5 days, a solution of graphene oxide is obtained;

[0040] The graphene oxide solution is filtered and dried to obtain graphene oxide.

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Abstract

The invention embodiment provides a preparation method for graphene oxide, and relates to the technical field of material preparation. The method comprises the following steps: placing a carbon-containing carbon source which is used as an anode and an electric conductive material which is used as a cathode into electrolyte water, electrifying the anode and the cathode with a direct current for three minutes or more to obtain a graphene oxide solution, and performing drying treatment on the graphene oxide solution to obtain the graphene oxide. According to the invention, in the preparation method for the graphene oxide, the water is used as an electrolyte and free of pollution, the graphene oxide has good dispersion in the solution, impurities are less and purification is not needed, and the preparation process is simple.

Description

technical field [0001] The invention belongs to the technical field of material preparation, in particular to a method for preparing graphene oxide. Background technique [0002] Graphene is a two-dimensional carbon material with a hexagonal honeycomb structure and has excellent electrical conductivity of 106Ω -1 cm -1 (per ohm per centimeter), high charge carrier speed 2.0×10 5 cm 2 V -1 the s -1 (square centimeter per volt per second), high theoretical specific surface area 2630m 2 g -1 (square meter per gram), excellent mechanical properties (Young's modulus 1TPa (Tepa) and high thermal conductivity of about 5000Wm -1 K -1 (watt per meter per degree) and other excellent performance. Due to the above properties, graphene has attracted extensive attention in the fields of electronics, optically transparent electrodes, chemical catalysis, fuel cells, gas storage, construction, and metal anticorrosion. Graphene oxide (graphene oxide, GO) is one of the derivatives of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/198
Inventor 孙红芳邢锋李大望刘剑丁铸董必钦范冰蔡泽荣任志丽
Owner SHENZHEN UNIV
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