Method for preparing two-dimension single layer plumbago alkene

A technology of single-layer graphene and silicon dioxide, applied in the direction of nanostructure manufacturing, nanotechnology, nanotechnology, etc., can solve the problems of high raw material cost or equipment cost, unsuitable for industrial scale production, limitations, etc., and achieve low raw material cost , easy to operate, good reproducible effect

Inactive Publication Date: 2009-10-21
HUBEI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, all these preparation technologies face two problems, one is that the cost of raw materials or equipment is relatively expensive; the other is that it is not suitable for industrial scale production
Therefore, it has brought great limitations to its application

Method used

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  • Method for preparing two-dimension single layer plumbago alkene
  • Method for preparing two-dimension single layer plumbago alkene
  • Method for preparing two-dimension single layer plumbago alkene

Examples

Experimental program
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Effect test

Embodiment 1

[0021] Example 1 Dispersed and dissolved 0.5 g of cobalt nitrate into 100 ml of ethanol, then added 5 g of magnesium oxide nanopowder, stirred and ultrasonicated at 40 Hz for 30 minutes, evaporated the ethanol solvent to dryness, and dried in vacuum at 100°C After 5 hours, it is finally ground into a fine powder with a particle size of 0.5-2 microns, which is the catalyst for preparing single-layer graphene. Then, 0.5 g of the above catalyst was put into figure 1 Shown in the reactor that is made up of quartz tube 2 and tubular electric furnace 1 (catalyst can be placed in open container 3), feed argon in quartz tube 2 with the flow rate of 200 milliliters per minute, electric furnace temperature is then raised to After constant temperature at 850°C, flow methane into the quartz tube 2 at a rate of 50 milliliters per minute for high-temperature pyrolysis for 45 minutes, then turn off the electric furnace and methane gas, and continue to pass argon gas to cool it down, and prep...

Embodiment 2

[0022] Embodiment 2 is by the preparation method of embodiment 1, just changes described cobalt nitrate into nickel nitrate, and electric furnace temperature rises to 850 DEG C and changes to rise to 1000 DEG C, obtains that the area of ​​large piece is about 1 square micron single-layer graphene, Some local folds, such as Figure 4 shown.

Embodiment 3

[0023] Embodiment 3 is by the preparation method of embodiment 1, just changes described ethanol into acetone, and the consumption of cobalt nitrate is increased to 2 grams from 0.5 gram, and in the product obtained, except single-layer graphene, also has many multi-walled carbon nanometers Tubes and other by-products.

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Abstract

The invention discloses a preparation method of two-dimensional single-layer graphene. Dispersing and dissolving 0.5-100 grams of nitrate into 100 ml-2 liters of organic solvent, and then adding 5-2000 grams of oxide or carbonate nano Powder, stirred and ultrasonicated at 40-59 Hz for 10-60 minutes, evaporated the organic solvent to dryness, dried in vacuum, and finally ground into a fine powder with a size of 0.1-10 microns to obtain a single-layer graphene catalyst; 0.5-50 Put the catalyst of gram single-layer graphene into the container, and pass the protective gas at the flow rate of 20-2000 ml per minute, then raise the temperature of the container to 850-1100 ° C, after constant temperature, use the flow rate of 10-500 ml per minute After passing through the carbon source gas for high-temperature pyrolysis for 5-45 minutes, cooling to obtain two-dimensional single-layer graphene. The invention has low equipment investment, low cost of raw materials, easy operation, simple process and good reproducibility, and is suitable for large-scale production.

Description

Technical field: [0001] The invention relates to a two-dimensional nanometer material, in particular to a preparation method of monoatomic layer graphene. Background technique: [0002] Single-layer graphene (Graphene) is a single-atom-layer planar crystal assembled by carbon atoms in a two-dimensional space according to a honeycomb grid. Graphene is considered to be the basic component of all other dimensional carbon materials. It can be wound into zero-dimensional fullerenes, rolled into one-dimensional carbon nanotubes, and stacked into three-dimensional graphite. In theory, people have studied two-dimensional graphene for nearly sixty years (Wallace, P.R.Phys.Rev.71, 622 (1947)). Single-layer graphene has always been considered to be thermodynamically unstable. It cannot exist alone, it is only an "academic" material. Until 2004, scientists at the University of Manchester in the United Kingdom prepared this two-dimensional material in the laboratory (Novoselov, K.S. et...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B31/02B82B3/00
Inventor 王贤保游海军李名剑余自勇
Owner HUBEI UNIV
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