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Method for preparing two-dimension single layer plumbago alkene

A single-layer graphene and catalyst technology, applied in nanostructure manufacturing, nanotechnology, nanotechnology and other directions, can solve problems such as limitations, high raw material cost or equipment cost, unsuitable for industrial scale production, etc., and achieves easy operation and raw material cost. Inexpensive, reproducible results

Inactive Publication Date: 2008-03-12
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
Comparison scheme
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, put 0.5 gram of above-mentioned catalyzers into the reactor that is formed by quartz tube 2 and electric tube furnace 1 as shown in Fig. Argon gas is passed into the interior, and then the temperature of the electric furnace is raised to 850°C. After constant temperature, methane is passed into the quartz tube 2 for high-temperature cracking at a flow rate of 50 milliliters per minute. After cooling, a small-sized single-layer graphene with an area of ​​about 0.02 square microns is prepared. The field emission scanning electron microscope photo is shown in Figure 2, ...

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, There are some wrinkles locally, as shown in Figure 4.

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 monolayer graphite alkene. 0.5 to 100 gram nitrates are dispersed and dissolved in 100 to 200 milliliter organic solvent and then 5 to 2000 gram nano powers of oxide or nitrate is added; after mixing to be ultrasonic under 40 to 59 HZ for 10 to 60 minutes, the organic solvent is evaporated, dried in vacuum and grinded into power with a dimension of 0.1 to 10 micron at last to get the catalyzer for monolayer graphite alkene; the catalyzer for monolayer graphite alkene with 0.5 to 50 gram is arranged in the container and pumped in protection gas with a flow of 20 to 200 milliliter per minute, then the container temperature is raised to 850 to 1100 degrees, after being in a constant temperature, the carbon source is pumped in with a flow of 10 to 500 milliliter per minute and the two-dimensional monolayer graphite alkene is acquired after cracking for 5 to 45 minutes under high temperature. The invention has the advantages of low device investment, low material cost, easy material acquisition, easy operation and technics and good reproducibility. The invention is suitable for 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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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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