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Metal-solution reduction method for preparing graphene

A technology of graphene and reduction method, applied in the field of new energy material preparation, can solve the problems of high cost, pollution, low graphene quality, etc., and achieve the effects of low processing cost, simple operation, and favorable mass production.

Inactive Publication Date: 2014-11-19
SHANDONG YUHUANG NEW ENERGY TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to make up for the deficiencies of the prior art, the present invention provides a metal-solution reduction method for preparing graphene that is simple in operation, pollution-free, and capable of mass production, and solves the high cost and serious pollution of the prior art for preparing graphene , and the low quality of prepared graphene

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  • Metal-solution reduction method for preparing graphene

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Embodiment 1

[0021] The present embodiment graphene preparation process is:

[0022] (1) Graphene oxide: Graphene oxide is prepared by the phosphoric acid sealing method independently developed by our company: first, 200g of natural graphite and 5L mixed acid composed of 4.5L concentrated sulfuric acid and 0.5L concentrated phosphoric acid are mixed in the reactor and controlled electronically. Stir evenly with a magnetic stirrer, and slowly add 500g of potassium permanganate at a temperature lower than 20°C; after that, seal the reactor and raise the temperature to 80°C to react for 2 hours, take the product out from the lower end of the reactor, dilute it into a 40L solution, and add 0.6L hydrogen peroxide to obtain a bright yellow graphite oxide solution; then, alternately centrifuge washing with acid (hydrochloric acid) and water until the solution pH=5-6 to remove impurity ions; finally, ultrasonically disperse graphite oxide to prepare a certain concentration of graphene oxide soluti...

Embodiment 2

[0025] The present embodiment graphene preparation process is:

[0026] (1) Graphene oxide: Graphene oxide is prepared by the phosphoric acid sealing method independently developed by our company: first, 200g of natural graphite and 5L mixed acid composed of 4.5L concentrated sulfuric acid and 0.5L concentrated phosphoric acid are mixed in the reactor and controlled electronically. Stir evenly with a magnetic stirrer, and slowly add 500g of potassium permanganate at a temperature lower than 20°C; after that, seal the reactor and raise the temperature to 75°C for 4 hours, take the product out of the lower end of the reactor, dilute it into a 40L solution, and add 0.6L hydrogen peroxide to obtain a bright yellow graphite oxide solution; then, alternately centrifuge washing with acid (sulfuric acid) and water until the solution pH=5-6 to remove impurity ions; finally, ultrasonically disperse graphite oxide to prepare a certain concentration of graphene oxide solution.

[0027] (...

Embodiment 3

[0029] The present embodiment graphene preparation process is:

[0030] (1) Graphene oxide: Graphene oxide is prepared by the phosphoric acid sealing method independently developed by our company: first, 200g of natural graphite and 5L mixed acid composed of 4.5L concentrated sulfuric acid and 0.5L concentrated phosphoric acid are mixed in the reactor and controlled electronically. Stir evenly with a magnetic stirrer, and slowly add 500g of potassium permanganate at a temperature lower than 20°C; after that, seal the reactor and raise the temperature to 85°C to react for 1 hour, take out the product from the lower end of the reactor, dilute it into a 40L solution, and add 0.6L hydrogen peroxide to obtain a bright yellow graphite oxide solution; then, alternately centrifuge washing with acid and water until the pH of the solution is 5-6 to remove impurity ions; finally, ultrasonically disperse graphite oxide to prepare a graphene oxide solution with a certain concentration.

[...

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Abstract

The invention particularly relates to a metal-solution reduction method for preparing graphene. A graphene oxide water solution with low concentration is subjected to reduction treatment by a compound reduction system of iron powder and hydrochloric acid, so as to prepare graphene powder. The graphene oxide water solution with low concentration is subjected to reduction treatment by the compound reduction system of metal iron powder and hydrochloric acid, so that the metal-solution reduction method is low in raw material cost, nontoxic, easy to operate, and beneficial to mass production, and has a wide large-scale industrial application prospect. According to the metal-solution reduction method, a dilute solution is adopted, so that the whole reaction process is small in influence on the environment; liquid waste only contains a few of ions, so that the treatment cost is low.

Description

(1) Technical field [0001] The invention belongs to the preparation technology of new energy materials, in particular to a metal-solution reduction method for preparing graphene. (2) Background technology [0002] Graphene is a carbon atom with sp 2 The hybridized orbitals form a hexagonal single-layer planar film arranged in a honeycomb crystal lattice, a two-dimensional material with a thickness of only one carbon atom. Graphene is currently the thinnest but also the hardest nanomaterial in the world. It is almost completely transparent and only absorbs 2.3% of light; its thermal conductivity is as high as 5300W / m·K, which is higher than that of carbon nanotubes and diamonds. Mobility over 15000cm 2 / (V s), which is higher than carbon nanotubes or silicon crystals, and the resistivity is only about 10 -6 Ω·cm, lower than copper or silver, is the material with the smallest resistivity in the world. Graphene has such excellent physical and chemical properties that it ha...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B31/04
Inventor 陈欣肖双王胜伟王瑛赵成龙董贺存张兵
Owner SHANDONG YUHUANG NEW ENERGY TECH
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