Preparation method for fluorescent carbon quantum dot with vitamin as carbon source
A technology of carbon quantum dots and vitamins, which is applied in the field of preparation of fluorescent carbon quantum dots, can solve the problems of large individual differences in natural organisms, difficult to repeat experimental results, complex components, etc., and achieves simple cost-effective, inexpensive devices, and biocompatibility. Good results
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[0030] Example 1
[0031] 0.1g vitamin B 9 Add to 35ml of deionized water, magnetically stir in a water bath at 90°C for 30min to form a uniform solution. Then transfer the resulting solution to a polytetrafluoroethylene reactor with a capacity of 50ml, and react at 200°C for 2h. After being naturally cooled to room temperature, a yellow transparent liquid was obtained. After centrifugation at 12000 r / min for 20 minutes, the supernatant was taken and freeze-dried to obtain carbon quantum dots with strong blue fluorescence.
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[0032] Example 2
[0033] 0.1g vitamin B 9 Add to 35ml of ethanol solution with a volume concentration of 30%, magnetically stir in a water bath at 90°C for 30min to form a uniform solution. Then transfer the resulting solution to a polytetrafluoroethylene reactor with a capacity of 50ml, and react at 200°C for 2h. After being naturally cooled to room temperature, a yellow transparent liquid was obtained. After centrifugation at 12000 r / min for 20 minutes, the supernatant was taken and freeze-dried to obtain carbon quantum dots with strong blue fluorescence. The solvent in this example uses 30% ethanol solution, which can increase vitamin B 9 The solubility.
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[0034] Example 3
[0035] 0.1g vitamin B 9 Add to 35ml ethylene glycol, magnetically stir for 30min to form a uniform solution. Then transfer the resulting solution to a polytetrafluoroethylene reactor with a capacity of 50ml, and react at 200°C for 2h. After natural cooling to room temperature, a light brown transparent liquid was obtained. After centrifugation at 12000 r / min for 20 minutes, the supernatant was taken and freeze-dried to obtain carbon quantum dots with strong blue fluorescence. The solvent in this example is ethylene glycol, which is an organic solvent that can increase vitamin B 9 The solubility.
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