Graphene, graphene preparation method and application
A graphene and reaction chamber technology, applied in the field of graphene preparation, can solve problems such as small specific surface area of graphene, and achieve the effect of increasing specific surface area and large surface area
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[0021] see figure 1 , figure 1 Show the flowchart of the method for preparing graphene in the embodiment of the present invention, including the following steps:
[0022] Step S01, vacuumize the reaction chamber:
[0023] Put the catalytic substrate into the reaction chamber and evacuate it;
[0024] Step S02, injecting inert gas into the reaction chamber:
[0025] Adjust the temperature of the substrate to 500°C to 1300°C, pass in an inert gas, and keep it for 1 minute to 60 minutes, so as to maintain an oxygen-free atmosphere in the reaction chamber;
[0026] Step S03, adjusting the temperature of the heating wire:
[0027] Adjust the temperature of the hot wire in the reaction chamber to 1000°C to 1500°C;
[0028] Step S04, preparing graphene
[0029] 10sccm-200sccm organic gas is fed into the reaction chamber to react for 1-300 minutes, and at the same time, the feeding speed of the inert gas is adjusted to vary from 10sccm / min to 50sccm / min to obtain graphene.
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Embodiment 1
[0046] The method for preparing graphene in the embodiments of the present invention comprises the following steps:
[0047] 1. Put the copper foil into the reaction chamber, and seal the reaction chamber. Use mechanical pump, Roots pump and molecular pump to pump the reaction chamber step by step to 2.0×10 -4 Pa, and keep it for 20 minutes;
[0048] 2. Turn off the molecular pump, start heating, adjust the substrate temperature to 500°C, and inject hydrogen gas at 100 sccm for 10 minutes;
[0049] 3. Turn on the hot wire with a power of 5KW, adjust the voltage of the hot wire to 43V, adjust the current to 32A, adjust the temperature of the hot wire to 1200°C, and keep it for 8 minutes;
[0050] 4. Feed 100 sccm of methane, and at the same time make the hydrogen flow rate change with time at a rate of 30 sccm / min, control the flow rate at 200 sccm, react for 100 minutes, and generate graphene;
[0051] 5. Stop heating, turn off the power supply of the hot wire, lower the sys...
Embodiment 2
[0054] The method for preparing graphene in the embodiments of the present invention comprises the following steps:
[0055] 1. Put the iron foil into the reaction chamber, and seal the reaction chamber. Use mechanical pump, Roots pump and molecular pump to pump the reaction chamber step by step to 5.0×10 -4 Pa, and keep it for 10 minutes;
[0056] 2. Turn off the molecular pump, start heating, adjust the substrate temperature to 800°C, and pass in nitrogen gas of 50 sccm for 40 minutes;
[0057] 3. Turn on the hot wire with a power of 5KW, adjust the voltage of the hot wire to 40V, adjust the current to 30A, and adjust the temperature of the hot wire to 1100°C;
[0058] 4. Introduce 10 sccm of acetylene, and at the same time increase the flow rate of carbon monoxide at a rate of 10 sccm / min over time, control the flow rate at 100 sccm, react for 300 minutes, and generate graphene;
[0059] 5. Stop heating, turn off the power supply of the hot wire, lower the system temperat...
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