Method for batch preparation of graphene quantum dots
A graphene quantum dot, batch technology, applied in graphene, single-layer graphene, chemical instruments and methods, etc., can solve the problems of graphene quantum dot activity damage, uncontrollable quantum dot shape and size, and expensive preparation cost. , to achieve the effect of less demand for raw materials and equipment types, good industrial application prospects, and simple technical processes
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Embodiment 1
[0030] The present embodiment prepares graphene quantum dots as follows:
[0031] (1), liquid nitrogen impregnation ultra-low temperature pretreatment
[0032] Weigh 100mg of high-purity graphite powder into a centrifuge tube with a volume of 50mL, and inject 40mL of liquid nitrogen into the centrifuge tube. The graphite powder is completely immersed in liquid nitrogen; place the centrifuge tube open in a liquid Soak in the nitrogen insulation barrel for 10 minutes;
[0033] (2), ultrasonic chemical peeling
[0034] Take out the centrifuge tube, and immediately disperse the graphite powder in 100 mL of a mixed solvent composed of water and isopropanol at a volume ratio of 1:1 after the liquid nitrogen is completely vaporized, and ultrasonically treat it at 135W for 10 minutes; then the product is heated at 2000 Centrifuge for 30 minutes at rpm, and take the supernatant to obtain graphene quantum dots.
[0035] Such as figure 1 As shown, the graphene quantum dots prepared i...
Embodiment 2
[0037] The present embodiment prepares graphene quantum dots as follows:
[0038] (1), liquid nitrogen impregnation ultra-low temperature pretreatment
[0039] Weigh 100mg of high-purity graphite powder into a centrifuge tube with a volume of 50mL, and inject 40mL of liquid nitrogen into the centrifuge tube. The graphite powder is completely immersed in liquid nitrogen; place the centrifuge tube open in a liquid Soak in the nitrogen insulation barrel for 10 minutes;
[0040] (2), ultrasonic chemical peeling
[0041] Take out the centrifuge tube, and immediately disperse the graphite powder in 100mL of a mixed solvent composed of water and isopropanol in a volume ratio of 3:2 after the liquid nitrogen is completely vaporized, and ultrasonically treat it for 60 minutes at 135W; Centrifuge for 30 minutes at rpm, and take the supernatant to obtain graphene quantum dots.
[0042] Such as figure 2 As shown, the graphene quantum dots prepared in this embodiment are evenly distri...
Embodiment 3
[0044] The present embodiment prepares graphene quantum dots as follows:
[0045] (1), liquid nitrogen impregnation ultra-low temperature pretreatment
[0046] Weigh 300mg of high-purity graphite powder into a centrifuge tube with a volume of 50mL, and inject 40mL of liquid nitrogen into the centrifuge tube. The graphite powder is completely immersed in liquid nitrogen; place the centrifuge tube open in a liquid Soak in a nitrogen insulation barrel for 60 minutes;
[0047] (2), ultrasonic chemical peeling
[0048] Take out the centrifuge tube, and immediately disperse the graphite powder in 300mL of a mixed solvent composed of water and isopropanol at a volume ratio of 2:1 after the liquid nitrogen is completely vaporized, and ultrasonically treat it for 60 minutes at an intensity of 135W; Centrifuge for 30 minutes at rpm, and take the supernatant to obtain graphene quantum dots.
[0049] Such as image 3 As shown, the graphene quantum dots prepared in this embodiment are ...
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