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

Inactive Publication Date: 2015-05-06
SOUTHWEST JIAOTONG UNIV
2 Cites 40 Cited by

AI-Extracted Technical Summary

Problems solved by technology

However, these substances are complex in composition and contain more impurities, which are not conducive to analysi...
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Method used

The present invention utilizes the rich characteristics of carbon, nitrogen and oxygen elements in vitamins, and adopts mature solvothermal synthesis method to prepare carbon quantum dots, which is a simple, low-cost and green fluorescent carbon quantum dot preparation method.
[0033] 0.1g vitamin B9 was added to 35ml volume concentration in ethanol solution of 30%, magnetically stirred in a water bath at 90°C for 30min to form a uniform solution. The resulting solution wa...
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Abstract

The invention relates to a preparation method for a fluorescent carbon quantum dot, and discloses a preparation method for a fluorescent carbon quantum dot with vitamin as the carbon source. The method includes the steps of: a. vitamin solution preparation: adding vitamin into a solvent, conducting magnetic stirring in a water bath pot at a temperature ranging from room temperature to 100DEG C to obtain a vitamin solution; b. solvothermal synthesis reaction: placing the vitamin solution into a reaction kettle to carry out heating reaction at 180-220DEG C; c. carbon quantum dot preparation: performing natural cooling to room temperature, then conducting centrifugation at a rotation speed of 10000-15000r/min for 10-30min, then taking the supernatant, and performing freeze drying, thus obtaining the fluorescent carbon quantum dot. According to the invention, the obtained carbon quantum dot has a small particle size of 2-5nm, and is uniformly dispersed, has high quantum yield and strong fluorescence properties, low toxicity, and good biocompatibility, and can be applied to cell imaging and detection of Cu<2+> and Fe<3+>.

Application Domain

Technology Topic

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  • Preparation method for fluorescent carbon quantum dot with vitamin as carbon source
  • Preparation method for fluorescent carbon quantum dot with vitamin as carbon source
  • Preparation method for fluorescent carbon quantum dot with vitamin as carbon source

Examples

  • Experimental program(12)

Example Embodiment

[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.

Example Embodiment

[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.

Example Embodiment

[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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PUM

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Description & Claims & Application Information

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