Preparation method and application of porous graphene film

A porous graphene, graphene technology, applied in graphene, chemical instruments and methods, inorganic chemistry and other directions, can solve problems such as lack of market competitiveness of products, and achieve good application prospects, good conductivity, and good market prospects.

Active Publication Date: 2020-08-04
南京动量材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, as mentioned earlier, high-cost raw materials and technological processes lead to products lacking market competitiveness

Method used

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  • Preparation method and application of porous graphene film
  • Preparation method and application of porous graphene film

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] The graphene film obtained in this embodiment is a graphene film with a three-dimensional porous structure inside, and its preparation steps are as follows:

[0032] S1. Preparation of precursor mixture

[0033] Mix iron oxide, mesophase pitch and water uniformly to prepare a precursor mixture, and the weight ratio of the three is 3:3:10.

[0034] S2. Forming the mixture film layer prepared in step S1 on the substrate, which can be uniformly coated by casting method or coating method, and the thickness is adjustable;

[0035] S3, drying to remove the solvent in the mixture to form the embryonic membrane, it should be noted that the drying temperature is less than 50 ° C, preferably naturally drying;

[0036] S4, in situ catalyzing the carbon in the carbon precursor to generate graphene;

[0037] This step is a key step of this method. The in-situ generation of graphene is realized by heat treatment. The heat treatment temperature is 600-1000°C, and the heat treatment ...

Embodiment 2

[0041] The preparation method of the present embodiment is similar to that of Example 1, the difference mainly lies in the raw materials, and the specific preparation steps are as follows:

[0042] S1. Preparation of precursor mixture

[0043] Mix nickel oxide, mesophase pitch and acetone uniformly to prepare a precursor mixture, and the weight ratio of the three is 4:3:8.

[0044] S2, forming the mixture film layer prepared in step S1 on the substrate;

[0045] S3, drying naturally to remove the solvent in the mixture to form the embryonic membrane;

[0046] S4. In a protective atmosphere, heat the embryo membrane to 600°C for 10 hours, then raise the temperature to 900°C for 10 hours, and catalyze the carbon in the carbon precursor to generate graphene in situ;

[0047] S5. Using acetic acid solution as a template-releasing agent, removing the template and drying to obtain a porous graphene membrane.

[0048] After testing, the thickness of the graphene film of this embod...

Embodiment 3

[0050] The preparation method of this embodiment is similar to that of Example 2, the difference mainly lies in the use of different templating agents, and the specific preparation steps are as follows:

[0051] S1. Preparation of precursor mixture

[0052] Mix ferric chloride, ammonia water, mesophase pitch and acetone evenly to prepare a precursor mixture, and the weight ratio of the four is 3:3:3:10.

[0053] S2, forming the mixture film layer prepared in step S1 on the substrate by spin coating;

[0054] S3, drying naturally to remove the solvent in the mixture to form the embryonic membrane;

[0055] S4. In a protective atmosphere, raise the temperature of the embryo membrane to 1000°C for 15 hours, and catalyze the carbon in the carbon precursor to generate graphene in situ;

[0056] S5. Using acetic acid solution as a template-releasing agent, removing the template and drying to obtain a porous graphene membrane.

[0057] After testing, the thickness of the graphene fi...

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Abstract

The invention discloses a preparation method and application of a porous graphene film. Graphene is generated through an in-situ method, namely under the condition of high temperature, a carbon precursor is firstly carbonized, then the carbon reduces a metal oxide into an elementary substance, and then the metal catalyzes the carbon into the graphene; compared with the process of preparing the graphene film by directly adopting the graphene as a raw material in the prior art, the process is simple, no pollution is caused in the production process, and a carbon source is cheap macromolecules orlarge organic molecules; the raw material is easy to obtain and low in cost, and the obtained film product is good in conductivity and rich in three-dimensional porous net structure and has good market prospects in the fields of electrode materials, water treatment and the like.

Description

technical field [0001] The invention relates to a graphene film, in particular to a preparation method and application of a porous graphene film; it belongs to the technical field of carbon materials. Background technique [0002] Graphene is a carbon atom with sp 2 The hybrid orbitals form a hexagonal two-dimensional carbon nanomaterial with a honeycomb lattice. With excellent optical, electrical, and mechanical properties, it is widely used in many fields such as mechanics, electricity, and biology, especially in the field of nanomaterials, which has broad application prospects. [0003] In the prior art, in the preparation process of graphene film, the main raw material used is graphene oxide, but the cost of graphene oxide is too high, resulting in the lack of market competitiveness of graphene film products, which cannot be widely promoted, which greatly limits its application field. For example, the invention patent "Preparation Method of Heterostructure Porous Grap...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/184C02F1/00
CPCC01B32/184C02F1/00C01B2204/32C01B2204/20C01B2204/22
Inventor 力小安嵇从民
Owner 南京动量材料科技有限公司
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