High-quality graphene powder and preparation method thereof
A graphene powder and graphene technology, applied in the field of high-quality graphene powder and its preparation, can solve the problems of graphene quality decline and restrictions on the popularization and application of graphene, and achieve low preparation cost, few defects, and high quality Effect
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Embodiment 1
[0047] Prepare 2 L of anisole solution of PMMA with a mass fraction of 6% for later use. Take 200 mL of 6% PMMA anisole solution and 3 g of h-BN powder, stir for 30 min, place in an oven at 120°C for 2 hours to fully evaporate the solvent, and obtain PMMA-coated h-BN. The aforementioned PMMA-coated h-BN was packed into a quartz tube with a size of Φ25×2 mm. When vacuuming to 300Pa, seal the quartz tube with a hydrogen-oxygen flame, and the length of the obtained quartz tube is about 150mm. The quartz tube 2 that raw material sample 1 is housed is buried in SiC ceramic 3, as figure 1 As shown, ensure that the part with the sample 1 can be completely placed in the SiC ceramic 3, and the outside is kept warm with a porous refractory brick 4. After that, the whole system was put into a household microwave oven with a frequency of 2.479GHz and a power of 850w (model G80F23N1XL-A1). After 15 minutes, the sample was taken out, and the quartz tube was opened to obtain graphene grow...
Embodiment 2
[0056] Prepare 1 L of anisole solution of PMMA with a mass fraction of 2% for later use. Take 300 mL of 2% PMMA anisole solution and 5 g of h-BN powder, stir for 20 min, and place in an oven at 120° C. for 2 hours to fully evaporate the solvent to obtain PMMA-coated h-BN. The aforementioned PMMA-coated h-BN was packed into a quartz tube with a size of Φ25×2 mm. When vacuuming to 300Pa, seal the quartz tube with a hydrogen-oxygen flame, and the length of the obtained quartz tube is about 150 mm.
[0057] The quartz tube 2 that raw material sample 1 is housed is buried in SiC ceramic 3, as figure 1 As shown, ensure that the part with the sample 1 can be completely placed in the SiC ceramic 3, and the outside is kept warm with a porous refractory brick 4. After that, the whole system was put into a household microwave oven with a frequency of 2.479GHz and a power of 850w (model G80F23N1XL-A1). After 10 minutes, the sample was taken out, and the quartz tube was opened to obtain...
Embodiment 3
[0062] Take 200 mL of 4% polystyrene anisole solution and 3 g of h-BN powder, stir for 30 min, then place in an oven at 120 ° C for 2 hours to fully evaporate the solvent to obtain PMMA-coated h-BN. The aforementioned PMMA-coated h-BN was packed into a quartz tube with a size of Φ25×2 mm. When evacuating to 500 Pa, seal the quartz tube with a hydrogen-oxygen flame, and the length of the obtained quartz tube is about 150 mm.
[0063] The quartz tube 2 that raw material sample 1 is housed is buried in SiC ceramic 3, as figure 1 As shown, ensure that the part with the sample 1 can be completely placed in the SiC ceramic 3, and the outside is kept warm with a porous refractory brick 4. After that, the whole system was put into a household microwave oven with a frequency of 2.479GHz and a power of 850w (model G80F23N1XL-A1). After 10 minutes, the sample was taken out, and the quartz tube was opened to obtain graphene grown on h-BN.
[0064] 4.6 g of the obtained h-BN / graphene comp...
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