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A method for the preparation of graphene oxide film assisted by gas stripping

A graphene film and fossil technology, applied in the field of gas-assisted rapid film formation, can solve the problems of time-consuming, toxic hydrogen iodide, and difficult transfer of graphene oxide film, etc., and achieve the effect of simple and easy method

Active Publication Date: 2021-09-07
SOUTHEAST UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The traditional method is the pressure transfer method. Specifically, the membrane formed by suction filtration is combined with the substrate to be transferred, and then a heavy object is pressed. After a few hours, the graphene oxide membrane on the filter paper can be transferred to the substrate. However, this method is time-consuming and it is difficult to completely transfer the graphene oxide film
The other is to dissolve the filter paper, which is to put the filter paper with graphene oxide membrane into the solvent that can dissolve the filter paper, so that the graphene oxide membrane can be separated from the filter paper, and then transferred to other substrates However, in the process of dissolving the filter paper in this method, there will be a large amount of residue, that is, it is difficult to obtain a pure graphene oxide film; finally, the filter paper with the graphene oxide film will be placed in the hydrogen iodide gas Reduction first, and then separation, but the hydrogen iodide used in this method is toxic and corrosive, which has a great impact on the ecological environment

Method used

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  • A method for the preparation of graphene oxide film assisted by gas stripping
  • A method for the preparation of graphene oxide film assisted by gas stripping

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] 1. Add graphene oxide and ferric chloride to 50ml of deionized water, and disperse evenly. The resulting dispersion has a concentration of graphene oxide of 0.5ug / ml and a concentration of ferric chloride of 5mg / ml;

[0020] 2. Suction filter the above dispersion liquid to form a membrane. The pore size of the filter paper is 0.22um. See figure 1 ;

[0021] 3. Dry the above-mentioned filter paper with graphene oxide, and at this time, ferric chloride will recrystallize and separate out;

[0022] 4. Put the dried filter paper into the solution of hydrogen peroxide. At this time, the hydrogen peroxide will generate oxygen under the catalysis of ferric chloride, thereby peeling off the graphene oxide from the filter paper. See figure 2 , the graphene oxide film is complete;

[0023] 5. Put the target substrate in the above-mentioned hydrogen peroxide solution, pick up the graphene oxide film, and realize the transfer process.

Embodiment 2

[0025] The specific method is the same as in Example 1, except that the concentration of graphene oxide is 10 ug / ml, and the concentration of ferric chloride is 0.5 mg / ml.

Embodiment 3

[0027] The specific method is the same as in Example 1, except that the concentration of graphene oxide is 20ug / ml, and the concentration of ferric chloride is 10mg / ml.

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Abstract

The invention discloses a method for preparing a graphene oxide film assisted by gas stripping. In the graphene oxide dispersion liquid, ferric trichloride is added, stirred evenly, and then vacuum-filtered to form a film; after the film is dried, the The entire membrane and filter paper are placed in a solution containing hydrogen peroxide, and with the help of gas generated by the reaction, the graphene oxide membrane is quickly peeled off from the filter paper, and then transferred to the desired substrate. The method has the advantages of simplicity, low cost, and complete membrane transfer.

Description

technical field [0001] The invention relates to the preparation of a new material graphene oxide film, mainly gas-assisted rapid film formation. Background technique [0002] Due to its excellent electrical properties, thermal properties, mechanical properties, etc., graphene has attracted more and more attention from the scientific and even industrial circles. However, in many applications such as transparent conductive electrodes, filter membranes, etc., it is necessary to prepare graphene oxide into a film. Among many film-forming methods, the suction filtration method has been greatly developed because of its simplicity. In order to use the membrane formed by suction filtration, it must be transferred to different substrates. The traditional method is the pressure transfer method. Specifically, the membrane formed by suction filtration is combined with the substrate to be transferred, and then a heavy object is pressed. After a few hours, the graphene oxide membrane on...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B32/198
CPCC01B32/198
Inventor 毕恒昌孙立涛
Owner SOUTHEAST UNIV
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