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A method for rapidly preparing graphene by laser under normal temperature and pressure

A graphene and normal pressure technology, applied in the field of rapid preparation of graphene by laser, can solve the problems of high cost, long time, and high process temperature, and achieve the effects of low cost, fast heating and cooling speed, and easy acquisition.

Active Publication Date: 2018-07-17
FUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the process temperature is generally high, time-consuming, and costly

Method used

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  • A method for rapidly preparing graphene by laser under normal temperature and pressure
  • A method for rapidly preparing graphene by laser under normal temperature and pressure
  • A method for rapidly preparing graphene by laser under normal temperature and pressure

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] (1) if figure 1 As shown, first, a copper foil 10 is provided, which is immersed in nitric acid (70%, aq) for 30-90 seconds; then the copper foil is immersed in deionized water and cleaned 5 times to remove surface residues; Rinse the copper foil with acetone and isopropanol to remove moisture, and dry it with nitrogen; finally place it in a tube furnace, and anneal at 950°C for 10 minutes under the protection of hydrogen;

[0026] (2) Provide a quartz glass vessel 11, fill the quartz glass vessel with liquid benzene 12; then immerse the treated copper foil in liquid benzene so that it is completely submerged by liquid benzene;

[0027] (3) Provide a laser light source 13 to irradiate the copper foil 10 placed in liquid benzene 12. The laser light source is a near-infrared light source with a wavelength of 1.06 μm. The laser beam spot is a Gaussian beam with a diameter of 30 μm and a power density of 1×10 6 W / cm 2 , patterned and scanned at a speed of 1 mm / s; the co...

Embodiment 2

[0029] (1) if image 3 As shown, at first, a substrate 20 is provided, which can be glass, silicon dioxide or plastic; a layer of metallic nickel 21 is evaporated on the substrate 20, and its thickness is 50-100 nm;

[0030] (2) Provide a quartz glass vessel 22, fill the quartz glass vessel with liquid benzene 23; then immerse the substrate plated with metal nickel into the liquid benzene so that it is completely submerged by the liquid benzene;

[0031] (3) Provide a laser light source 24 to irradiate the metal nickel 21 placed on the substrate in the liquid benzene 23. The laser light source is a near-infrared light source with a wavelength of 1.06 μm. The laser beam spot is a Gaussian beam with a diameter of 30 μm. The power density is 2×10 5 W / cm 2 , patterned scanning at a speed of 1 mm / s; the metal nickel 21 can effectively absorb the energy of the laser and heat up rapidly, thereby absorbing the carbon atoms of the surrounding liquid benzene. When the laser scanning ...

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Abstract

The invention relates to a method for preparing graphene rapidly through lasers at normal temperature and pressure. The method comprises the following steps: a metal catalyst is provided; a liquid carbon source is provided, and the metal catalyst is immersed in the liquid carbon source; a laser source is provided and irradiates the metal catalyst after penetrating the liquid carbon source, the metal catalyst is heated instantly, and the liquid carbon source forms a graphene film on the surface of the metal catalyst under the action of the metal catalyst. A patterned graphene film can be further formed on the surface of the metal catalyst if the laser source scans and irradiates the metal catalyst according to certain pattern. According to the method, heating and cooling speeds are high, and the method has the advantage of rapid graphene preparation.

Description

technical field [0001] The invention belongs to the field of graphene preparation, and in particular relates to a method for rapidly preparing graphene by using a laser under normal temperature and pressure. Background technique [0002] Since the British scientists Andre Geim (Andre Geim) and Konstantin Novoselov (Konstantin Novoselov) successfully obtained graphene by mechanical separation in 2004, graphene has set off a wide range of widespread worldwide. research boom. [0003] Graphene is carbon atoms with SP 2 A two-dimensional crystal composed of hybridized single atoms is almost completely transparent. It is currently the thinnest, highest strength, and strongest electrical and thermal conductivity material in nature. Its electron mobility exceeds 15,000 cm at room temperature. 2 / (V·s), which has great application potential in the fields of nanoelectronic devices, sensor devices and optoelectronic devices. With the in-depth research on graphene, there are two mai...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B32/184
CPCC01P2002/82
Inventor 胡海龙郭太良黄航朱敬光李福山杨尊先周雄图张永爱叶芸孙磊
Owner FUZHOU UNIV