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Method for preparing waste recovered graphite powder into graphene

A graphene and graphite powder technology, applied in the field of nanomaterials, can solve the problems of long cycle, environmental pollution and high production cost, and achieve the effects of low cost, huge environmental benefit and short preparation cycle

Active Publication Date: 2014-01-22
泰州巨纳新能源有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the existing problems such as high production cost, long cycle, and environmental pollution in the existing methods for preparing graphene, the present invention provides a method for preparing graphene using waste and recycled graphite powder as a carbon source, which can effectively solve the above problems and produce The finished product has the general characteristics of graphene, and the materials required for synthesis are easy to obtain and the method is simple

Method used

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  • Method for preparing waste recovered graphite powder into graphene
  • Method for preparing waste recovered graphite powder into graphene

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] 1. Graphite mixed with concentrated sulfuric acid

[0037] First, add 1.0g of graphite powder and 20ml of 98% concentrated sulfuric acid into the reactor and stir to make them evenly mixed. At the same time, use a cooling device (ice bath) to keep the reactor at a low temperature.

[0038] 2. Add potassium permanganate

[0039] After mixing evenly, slowly (very slowly, the temperature will rise sharply during heating) add 3.5g potassium permanganate to the above reaction kettle, and at the same time stir the above solution with a mechanical stirrer at high speed, so that the potassium permanganate can be mixed with the above solution Full contact. During the addition process, use an external cooling device (ice bath) to keep the temperature of the reaction solution in the kettle below 20 degrees Celsius. At this point the solution turned from black to dark green. After the addition was complete, the temperature of the solution was raised to 35 degrees Celsius using a...

Embodiment 2

[0049] 1. Graphite mixed with concentrated sulfuric acid

[0050] First, add 1.0g of graphite powder and 50ml of 98% concentrated sulfuric acid into the reactor and stir to make them evenly mixed. At the same time, use a cooling device (ice bath) to keep the reactor at a low temperature.

[0051] 2. Add potassium permanganate

[0052] After mixing evenly, slowly (very slowly, the temperature will rise sharply during heating) add 4.0g potassium permanganate to the above reaction kettle, and at the same time stir the above solution with a mechanical stirrer at high speed, so that the potassium permanganate can be mixed with the above solution Full contact. During the addition process, use external cooling equipment (circulating water cooling) to keep the temperature of the reaction solution in the kettle below 20 degrees Celsius. At this point the solution turned from black to dark green. After the addition was complete, the temperature of the solution was raised to 35 degree...

Embodiment 3

[0062] 1. Graphite mixed with concentrated sulfuric acid

[0063] First, add 1.0g of graphite powder and 100ml of 98% concentrated sulfuric acid into the reactor and stir to make them evenly mixed. At the same time, use a cooling device (ice bath) to keep the reactor at a low temperature.

[0064] 2. Add potassium permanganate

[0065] After mixing evenly, slowly (very slowly, the temperature will rise sharply during heating) add 5.0g potassium permanganate into the above reaction kettle, and at the same time stir the above solution with a mechanical stirrer at high speed, so that the potassium permanganate can be mixed with the above solution Full contact. During the addition process, use external cooling equipment (circulating water cooling) to keep the temperature of the reaction solution in the kettle below 20 degrees Celsius. At this point the solution turned from black to dark green. After the addition was complete, the temperature of the solution was raised to 35 ...

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Abstract

The invention relates to a method for preparing waste recovered graphite powder into graphene. The method comprises the following steps of: mixing waste recovered graphite powder and concentrated sulfuric acid in a reaction kettle, stirring and uniformly mixing; slowly adding potassium permanganate; fully stirring and keeping a low temperature (20 DEG C); heating solution to 35+ / -5 DEG C and keeping the temperature for 30-90 minutes; slowly adding a certain amount of distilled water, heating the solution to 80-90 DEG C and keeping the temperature for 15-30 minutes; slowly adding hydrogen peroxide into the solution and slowly stirring to obtain golden yellow graphene oxide slurry; washing the slurry by using hydrochloric acid, potassium hydroxide and de-ionized water of certain concentration in sequence to remove impurity ions; and finally, holding an obtained graphene oxide sample in a high-temperature reaction furnace, and heating under an environment of argon, hydrogen or ammonia gas at 500-800 DEG C for 1-3 hours to reduce to obtain a graphene sample with thickness of 1-5 atom layers. The method has the advantages of low production cost, short period, high yield, simplicity and easiness for control of equipment and suitability for large-scale production. The waste recovered graphite powder is used as a carbon source, so that the utilization rate of an environment resource is effectively increased.

Description

Technical field [0001] The invention relates to a nanometer material technology, in particular to a method for preparing a two-dimensional nanometer material graphene by using a chemical method using waste recycled graphite powder as a carbon source. Background technique [0002] Graphene is made of carbon atoms with sp 2 The two-dimensional crystal formed by hybridization and arranged into a honeycomb hexagonal planar structure is the basic unit of other carbon material allotropes. Graphene has excellent electrical, optical, thermal and mechanical properties, and has extremely high stability, and has extremely wide applications in many fields. [0003] There are several ways to prepare graphene: one is slight friction method or tape tearing method, which peels graphene from the surface of graphite to obtain very high-quality single-layer graphene, but at present this method can only prepare graphene smaller than 1 mm Graphene sheets are more suitable for basic research ap...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B31/04B82Y40/00C01B32/19
Inventor 丁荣倪振华郭喜涛
Owner 泰州巨纳新能源有限公司
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