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A kind of green preparation method of graphene

A graphene and graphene suspension technology, applied in the field of materials, can solve the problems of unfavorable large-scale production and application, dangerous use process, high energy consumption, etc., and achieve high safety and reliability, simple raw materials, and low hydrothermal reaction temperature Effect

Inactive Publication Date: 2017-10-31
JILIN UNIV
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Problems solved by technology

But these two types of methods have disadvantages. The first type of method has high reaction temperature, high energy consumption, and high requirements for equipment; most of the reducing agents in the second type of method are toxic reagents, the use process is more dangerous, and the reaction time is too long. Long, inconvenient to clean, not conducive to large-scale production and application

Method used

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  • A kind of green preparation method of graphene
  • A kind of green preparation method of graphene
  • A kind of green preparation method of graphene

Examples

Experimental program
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Effect test

Embodiment 1

[0023] This embodiment is a preferred embodiment.

[0024] (1) Disperse 60mg of GO in 60mL aqueous solution, and ultrasonicate for 1h to form a brown-yellow graphene oxide suspension;

[0025] (2) add 3mL in the graphene oxide suspension that step (1) obtains, the sodium humate solution of 5mol / L, stir;

[0026] (3) Transfer the solution obtained in step (2) into a 100mL hydrothermal reaction kettle, and conduct a hydrothermal reaction at 80°C for 24h;

[0027] (4) The product obtained in step (3) is washed with alcohol and distilled water at 8000 rpm for 5 times, each time for 3 min, and the product obtained is dried to obtain a graphene product.

Embodiment 2

[0029] (1) Disperse 300mg of GO in 60mL aqueous solution, and ultrasonicate for 1h to form a brown-yellow graphene oxide suspension;

[0030] (2) add 5mL in the graphene oxide suspension that step (1) obtains, the sodium humate solution of 5mol / L, stir;

[0031] (3) Transfer the solution obtained in step (2) into a 100mL hydrothermal reaction kettle, and perform a hydrothermal reaction at 100°C for 18h;

[0032] (4) The product obtained in step (3) is washed with alcohol and distilled water at 10,000 rpm for 6 times, each time for 5 min, and the product obtained is dried to obtain a graphene product.

Embodiment 3

[0034] (1) Disperse 30 mg of GO in 60 mL of aqueous solution, and ultrasonicate for 0.5 h to form a brown-yellow graphene oxide suspension;

[0035] (2) add 1mL in the graphene oxide suspension that step (1) obtains, the sodium humate solution of 5mol / L, stir;

[0036] (3) Transfer the solution obtained in step (2) into a 100mL hydrothermal reaction kettle, and perform a hydrothermal reaction at 120°C for 12h;

[0037] (4) The product obtained in step (3) is washed with alcohol and distilled water at 8000 rpm for 5 times, each time for 3 min, and the product obtained is dried to obtain a graphene product.

[0038] attached figure 1 It is the X-ray diffraction (XRD) spectrogram of graphene and graphene oxide obtained in Example 1 of the present invention. Depend on figure 1 It can be seen that the graphene oxide curve has a strong diffraction peak around 2θ of about 10°, that is, the diffraction peak of the graphite oxide (001) plane. After reduction by sodium humate, the c...

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Abstract

The invention discloses an environment-friendly preparing method of graphene. The environment-friendly preparing method includes the following steps that 1, a certain amount of graphite oxide (GO) is added into a proper amount of distilled water,the mixture is subjected to ultrasonic treatment for 0.5-1 h, and graphene oxide suspension liquid with the even dispersion concentration is obtained; 2, a proper quantity of sodium humate solution with the certain concentration is added into the graphene oxide suspension liquid obtained in the step 1 and stirred to be even; 3, the solution obtained in the step 2 is transferred into a hydrothermal reaction kettle and reacted for a certain time at a certain temperature; 4, the product obtained in the step 3 is filtered and subjected to centrifugal washing, and the graphene (rGO) product is obtained. By means of the environment-friendly preparing method, the raw materials are simple and easy to obtain, the method is simple and feasible, the hydrothermal reaction temperature is relatively low, great safe reliability is achieved, a toxic reagent is avoided in the whole technology process, the more environment-friendly effect is achieved, and the environment-friendly preparing method is suitable for large-scale production.

Description

technical field [0001] The invention belongs to the technical field of materials and relates to a preparation method of graphene. Background technique [0002] Graphene is a new type of carbon material with a two-dimensional honeycomb lattice structure with excellent performance. Its basic structural unit is the most stable six-membered benzene ring in organic materials. It is currently the most ideal two-dimensional nano-carbon material. Since British physicists Andre Heim and Konstantin Novoselov successfully stripped graphene from graphite in 2004, its excellent physical and chemical properties make it widely used in chemical industry, materials, Medicine and other fields have important application prospects. [0003] At present, there are three typical methods for the preparation of graphene, namely mechanical exfoliation, redox and chemical vapor deposition. Among them, the mechanical stripping method and chemical vapor deposition method are not conducive to wide appl...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B32/192
CPCC01P2002/72C01P2002/82C01P2004/03
Inventor 黄继国向宁康春莉李日升陈海涛郭雪婷刘星娟
Owner JILIN UNIV
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