Graphene powder with controllable morphology and preparation method thereof
A technology of graphene powder and graphene, which is applied in the direction of graphene, chemical instruments and methods, inorganic chemistry, etc., can solve difficult problems and achieve good dispersion, high crystallization quality, and excellent electrical conductivity
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Embodiment 1
[0046] Heat the reaction furnace cavity to 900°C under a nitrogen protective atmosphere, add 50g of nickel chloride into the constant temperature zone of the reaction furnace cavity, and keep it warm for 2 minutes; feed the mixed gas of methane and hydrogen, and the flow rate of methane and hydrogen in the mixed gas The ratio is 1:50, the reaction time is 3min, and graphene is catalyzed on the surface of the reduced nickel chloride substrate. The prepared reactant was taken out under a nitrogen protective atmosphere. The resulting product is polyhedral (e.g. figure 1 ), with an average particle size of 6 μm. The prepared reactant was put into 3mol / L hydrochloric acid aqueous solution (etching solution), and kept at 80° C. for 30 min to completely remove the nickel in the graphene polyhedron, and filter the graphene powder After extraction, cleaning and drying, hollow graphene particles are obtained. structured as figure 2 shown. From the Raman spectrum of the obtained sa...
Embodiment 2
[0049] Under the protective atmosphere of argon, the reaction furnace cavity was heated to 900°C, 50g of nickel chloride was added to the constant temperature zone of the reaction furnace cavity, and kept for 2 minutes; the mixed gas of methane, hydrogen and argon was introduced, and the methane 1. The volume flow ratio of hydrogen and argon is 1:10:80, and the reaction time is 5 minutes, and the graphene is catalyzed and grown on the surface of the reduced nickel chloride substrate. The prepared reactant was taken out under an argon protective atmosphere. The resulting product is spherical (e.g. Figure 7 ), with an average particle size of 3 μm. The prepared reactant was put into 3mol / L hydrochloric acid aqueous solution (etching solution), and kept at 80° C. for 30 min to completely remove the nickel in the graphene polyhedron, and filter the graphene powder Gained graphene hollow microspheres after extraction, cleaning and drying.
Embodiment 3
[0051] Under the protective atmosphere of argon, the reaction furnace cavity was heated to 1000°C, 50g of copper sulfate was added to the constant temperature zone of the reaction furnace cavity, and kept for 2 minutes; the mixed gas of methane, hydrogen and argon was introduced, and the methane, The volume flow ratio of hydrogen and argon is 1:30:100, the reaction time is 20 minutes, and the graphene is catalyzed on the surface of the reduced copper sulfate substrate. The prepared reactant was taken out under an argon protective atmosphere. The resulting product is spherical (e.g. Figure 8 ), with an average particle size of 1 μm. Put the prepared reactant into 2mol / L sulfuric acid aqueous solution (etching solution), keep it warm at 80°C for 60min, completely remove the copper in the graphene polyhedron, and filter out the graphene powder , cleaning and drying the obtained graphene hollow particles.
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