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Process for preparing graphene oxides

A technology of graphene and graphite, which is applied in the field of graphene oxide preparation, can solve the problems of prolonging the production cycle, reducing the utilization rate of equipment, and difficulty in recycling waste liquid, so as to improve the utilization rate of materials, increase the utilization rate of equipment, and facilitate separation and purification Effect

Inactive Publication Date: 2013-09-11
何钊
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Problems solved by technology

A large amount of water is used in the subsequent purification process, and a large amount of ions (difficult to remove) remain in the obtained waste liquid, which will cause great damage to the environment after discharge
[0007] The medicines used in the Hummer method are expensive and used in large quantities, which increases the cost of the preparation process; a large number of ion residues make the subsequent purification process more difficult, and a large amount of water needs to be consumed for repeated cleaning and dialysis, which also increases the cost input; waste liquid is difficult to recycle, resulting in A lot of waste; the preparation process is cumbersome, which prolongs the production cycle and reduces the utilization rate of equipment

Method used

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  • Process for preparing graphene oxides
  • Process for preparing graphene oxides

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Experimental program
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Embodiment 1

[0026] After mixing 2g reagent graphite powder and 2g benzoyl peroxide, add 15g concentration of 30% peracetic acid / hydrogen peroxide solution, and vibrate ball mill for 1h under the conditions of stainless steel ball mill jar and stainless steel ball, to obtain graphite oxide Then, the obtained graphene oxide slurry was configured as 200ml aqueous solution, and after standing for clarification, the supernatant liquid was taken, and the supernatant liquid was heated and evaporated to dryness to obtain a graphene oxide powder sample. After determination, the yield of the obtained graphene oxide was 22.92%.

Embodiment 2

[0028] On the basis of Example 1, keeping other conditions unchanged, just changing graphite into expanded graphite, the yield of graphene oxide finally obtained was 28.44%.

Embodiment 3

[0030] 2g reagent graphite powder, 6g benzoyl peroxide, and 15g concentration are 30% peracetic acid / hydrogen peroxide solution in a stainless steel ball mill jar and a stainless steel ball for 1 h to obtain a graphene oxide slurry, and then The obtained graphene oxide slurry was configured as a 200ml aqueous solution and allowed to stand for clarification, then the supernatant was taken, and the supernatant was heated and evaporated to dryness to obtain a graphene oxide powder sample.

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Abstract

The invention discloses a process for preparing graphene oxides. According to the process, graphite, benzoyl peroxide and peracetic acid / hydrogen peroxide are mixed and then subjected to full reaction through vibrating ball milling to obtain the graphene oxides. The process for preparing the graphene oxides has the advantages of being simple, cheap, quick, efficient, safe, economical and environmentally friendly.

Description

technical field [0001] The invention relates to the technical field of graphene, in particular to a preparation method of graphene oxide. Background technique [0002] Graphene is a two-dimensional crystal structure composed of closely packed carbon atoms. Since the independent single-layer graphene was first reported in 2004, it has been highly valued by research institutions around the world. As a two-dimensional carbon atom crystal, graphene has excellent properties in terms of force, heat, electricity, and light. It has become a research hotspot in the fields of chemistry, materials science, and physics in recent years. [0003] Graphene oxide is the precursor of graphene (graphene can be obtained through a simple reduction process of graphene oxide), and actively explores the cheap mass production and preparation technology of graphene oxide, which has great academic significance for the wide application and technical research of graphene. Research value and commercial...

Claims

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Application Information

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IPC IPC(8): C01B31/04C01B32/192C01B32/198
Inventor 何钊周超
Owner 何钊
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