Method for preparing fluorine-doped fluorescent carbon quantum dots
A technology of carbon quantum dots and fluorine doping, applied in chemical instruments and methods, nano optics, luminescent materials, etc., can solve the problems of complex preparation process, high energy consumption, low yield, etc., and achieve good application prospects, good light The effect of stability
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example 1
[0024] (1) Add 40mL of 7mmol / L glucose dispersion into the polytetrafluoroethylene hydrothermal reaction kettle, the solvent of the dispersion is ethanol, then add 1mL of hydrofluoric acid, cover and seal.
[0025] (2) Put the reaction kettle in (1) into a muffle furnace, and react at 200° C. for 24 hours.
[0026] (3) The solution obtained in (2) is 0.22 μm filter membrane to remove large particles through the aperture, and the filtrate obtained joins in the dialysis bag for dialysis, the molecular weight cut-off is 500D, the dialysis fluid is deionized water, and the dialysis time is 2- For 7 days, change the deionized water every 6 hours.
[0027] (4) Transfer the product in the dialysis bag to a flask, and remove the solvent by distillation under reduced pressure.
[0028] (5) Dry the solid obtained in (4) in a vacuum oven for 48 hours to obtain a fluorine-doped fluorescent carbon quantum dot product. The product mass obtained was 19.8 mg.
[0029] The size distribution...
example 2
[0034] (1) Add 40mL of 28mmol / L glucose dispersion into a polytetrafluoroethylene hydrothermal reaction kettle, the dispersion solvent is acetonitrile, then add 2mL of hydrofluoric acid, cover and seal.
[0035] (2) Put the reaction kettle in (1) into a muffle furnace, and react at 180° C. for 24 hours.
[0036] (3) The solution obtained in (2) is 0.22 μm filter membrane to remove large particles through the aperture, and the filtrate obtained joins in the dialysis bag for dialysis, the molecular weight cut-off is 500D, the dialysis fluid is deionized water, and the dialysis time is 2- For 7 days, change the deionized water every 6 hours.
[0037] (4) Transfer the product in the dialysis bag to a flask, and remove the solvent by distillation under reduced pressure.
[0038] (5) Dry the solid obtained in (4) in a vacuum oven for 48 hours to obtain a fluorine-doped fluorescent carbon quantum dot product. The product mass obtained was 46.8 mg.
example 3
[0040] (1) Add 40mL of 14mmol / L glucose dispersion into the polytetrafluoroethylene hydrothermal reaction kettle, the solvent of the dispersion is ethanol, then add 1mL of hydrofluoric acid, cover and seal.
[0041] (2) Put the reaction kettle in (1) into a muffle furnace, and react at 160° C. for 24 hours.
[0042] (3) The solution obtained in (2) is 0.22 μm filter membrane to remove large particles through the aperture, and the filtrate obtained joins in the dialysis bag for dialysis, the molecular weight cut-off is 500D, the dialysis fluid is deionized water, and the dialysis time is 2- For 7 days, change the deionized water every 6 hours.
[0043] (4) Transfer the product in the dialysis bag to a flask, and remove the solvent by distillation under reduced pressure.
[0044] (5) Dry the solid obtained in (4) in a vacuum oven for 48 hours to obtain a fluorine-doped fluorescent carbon quantum dot product. The product mass obtained was 22.2 mg.
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