Preparation method of graphene in specific size
A specific size and graphene technology, applied in graphene, chemical instruments and methods, inorganic chemistry, etc., can solve the problem of high cost and achieve the effect of low cost, high efficiency and good size controllability
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Embodiment 1
[0021] The present embodiment provides a kind of preparation method of graphene of specific size, and concrete steps are as follows:
[0022] A: Use copper foil with a size of 2*2mm as the catalytic substrate, clean the surface with hydrochloric acid, remove the oxide layer on the surface of the copper foil, dry it and place it in the reactor;
[0023] B: Into the reactor, a helium gas with a flow rate of 600 sccm was introduced for 0.5 h to remove impurity gases, and then a hydrogen gas with a flow rate of 500 sccm was introduced;
[0024] C: Raise the temperature of the copper foil to 970°C, and feed in methane with a flow rate of 600 sccm. The methane is cracked to generate carbon atoms. With the assistance of hydrogen, the carbon atoms are adsorbed on the copper surface and grow into graphene;
[0025] D: Rapidly cool down to room temperature, take out the product, and separate and transfer graphene and copper foil by mechanical peeling method. The time required for the r...
Embodiment 2
[0027] The present embodiment provides a kind of preparation method of graphene of specific size, and concrete steps are as follows:
[0028] A: Use nickel foil with a size of 1*2mm as the catalytic substrate, clean the surface with hydrochloric acid, remove the oxide layer on the surface of the nickel foil, dry it and place it in the reactor;
[0029] B: Into the reactor, a helium gas with a flow rate of 600 sccm was introduced for 0.5 h to remove impurity gases, and then a hydrogen gas with a flow rate of 300 sccm was introduced;
[0030] C: Raise the temperature of the nickel foil to 1050°C, and feed ethylene with a flow rate of 400 sccm. The ethylene is cracked to generate carbon atoms. With the assistance of hydrogen, the carbon atoms are adsorbed on the surface of the nickel foil and grow into graphene;
[0031] D: Rapidly cool down to room temperature, take out the product, and use mechanical stripping method to separate and transfer graphene from nickel foil. The time...
Embodiment 3
[0033] The present embodiment provides a kind of preparation method of graphene of specific size, and concrete steps are as follows:
[0034] A: Use a hexagonal copper-nickel alloy sheet with a side length of 1mm as the catalytic substrate, clean the surface with hydrochloric acid, remove the oxide layer on the surface of the copper-nickel alloy, dry it and place it in the reactor;
[0035] B: Into the reactor, the argon gas with a flow rate of 500 sccm was introduced for 0.5 h to remove impurity gases, and then the hydrogen gas with a flow rate of 400 sccm was introduced;
[0036] C: Raise the temperature of the copper-nickel alloy to 800°C, and feed in acetylene with a flow rate of 500 sccm. The acetylene is cracked to generate carbon atoms. With the assistance of hydrogen, the carbon atoms are adsorbed on the surface of the copper-nickel alloy and grow into graphene;
[0037] D: Rapidly cool down to room temperature, take out the product, and separate and transfer graphene ...
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Abstract
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