Whole-green red carbon quantum dot preparation method
A technology of carbon quantum dots and red, applied in the field of preparation of red carbon quantum dots, can solve the problems of harsh luminescence conditions, cumbersome reaction process, dangerous operation process, etc., and achieve the effect of good optical properties, abundant sources, and simple preparation conditions
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Embodiment 1
[0033] A kind of all-green red carbon quantum dot preparation method, comprises the following steps:
[0034] 1) Weigh 100g of spinach and place it in a round bottom flask after cleaning and squeezing to remove moisture.
[0035] 2) Add 20mL of ethanol to the round bottom flask, and sonicate for 30min.
[0036] 3) Put the spinach pigment mixture in a polytetrafluoroethylene hydrothermal reaction kettle for 12 hours at 180°C.
[0037] 4) Suction filter the prepared tan solution with a 0.22 μm polytetrafluoroethylene filter membrane to obtain a filtrate.
[0038] 5) Take 2 mL of the filtrate and place it in a 1000 Da dialysis bag, and finally place the dialysis bag in a beaker filled with 40 mL of ethanol to fix and seal it to obtain a light yellow liquid.
[0039] 6) Then, collect the solution outside the dialysis bag every other day at room temperature and replace the dialysate to obtain red carbon quantum dots prepared with spinach pigment as the carbon source material.
Embodiment 2
[0041] A kind of all-green red carbon quantum dot preparation method, comprises the following steps:
[0042] 1) Weigh 100g of spinach and place it in a round bottom flask after cleaning and squeezing to remove moisture.
[0043] 2) Add 25mL of acetone to the round bottom flask, and sonicate for 40min.
[0044] 3) Put the spinach pigment mixture in a polytetrafluoroethylene hydrothermal reaction kettle for 16 hours at 160°C.
[0045] 4) Suction filter the prepared tan solution with a 0.22 μm polytetrafluoroethylene filter membrane to obtain a filtrate.
[0046] 5) Take 2 mL of the filtrate and place it in a 1000 Da dialysis bag, and finally place the dialysis bag in a beaker filled with 30 mL of acetone to fix and seal it to obtain a light yellow liquid.
[0047] 6) Then, collect the solution outside the dialysis bag every other day at room temperature and replace the dialysate to obtain red carbon quantum dots prepared with spinach pigment as the carbon source material.
Embodiment 3
[0049] A kind of all-green red carbon quantum dot preparation method, comprises the following steps:
[0050] 1) Weigh 100g of spinach and place it in a round bottom flask after cleaning and squeezing to remove moisture.
[0051]2) Add 40mL dimethylformamide to the round bottom flask, and sonicate for 2h.
[0052] 3) Put the spinach pigment mixture in a polytetrafluoroethylene hydrothermal reaction kettle for 8 hours at 240°C.
[0053] 4) Suction filter the prepared tan solution with a 0.22 μm polytetrafluoroethylene filter membrane to obtain a filtrate.
[0054] 5) Take 2 mL of the filtrate and place it in a 1000 Da dialysis bag, and finally place the dialysis bag in a beaker filled with 40 mL of dimethylformamide to fix and seal it to obtain a light yellow liquid.
[0055] 6) Then, collect the solution outside the dialysis bag every other day at room temperature and replace the dialysate to obtain red carbon quantum dots prepared with spinach pigment as the carbon source m...
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