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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
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, these substances are complex in composition and contain more impurities, which are not conducive to analysis
And due to the large individual differences of natural organisms, it is difficult to repeat the experimental results

Method used

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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
Comparison scheme
Effect test

Embodiment 1

[0031] 0.1g vitamin B 9 Add it into 35ml of deionized water, and stir magnetically in a water bath at 90°C for 30min to form a uniform solution. The resulting solution was then transferred to a polytetrafluoroethylene reactor with a capacity of 50 ml, and reacted at 200° C. for 2 h. After naturally cooling to room temperature, a yellow transparent liquid was obtained. After centrifuging at a speed of 12000r / min for 20min, the supernatant was freeze-dried to obtain carbon quantum dots with strong blue fluorescence.

Embodiment 2

[0033] 0.1g vitamin B 9 Add it into 35ml of ethanol solution with a volume concentration of 30%, and stir magnetically in a water bath at 90°C for 30min to form a uniform solution. The resulting solution was then transferred to a polytetrafluoroethylene reactor with a capacity of 50 ml, and reacted at 200° C. for 2 h. After naturally cooling to room temperature, a yellow transparent liquid was obtained. After centrifuging at a speed of 12000r / min for 20min, the supernatant was freeze-dried to obtain carbon quantum dots with strong blue fluorescence. This example solvent adopts the ethanol solution that volume concentration is 30%, can improve vitamin B 9 solubility.

Embodiment 3

[0035] 0.1g vitamin B 9 Add it into 35ml of ethylene glycol and stir it magnetically for 30min to form a homogeneous solution. The resulting solution was then transferred to a polytetrafluoroethylene reactor with a capacity of 50 ml, and reacted at 200° C. for 2 h. After naturally cooling to room temperature, a light brown transparent liquid was obtained. After centrifuging at a speed of 12000r / min for 20min, the supernatant was freeze-dried to obtain carbon quantum dots with strong blue fluorescence. In this example, the solvent is ethylene glycol, which is an organic solvent that can increase vitamin B 9 solubility.

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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+>.

Description

technical field [0001] The invention relates to nanometer materials, in particular to a method for preparing fluorescent carbon quantum dots. Background technique [0002] In recent years, fluorescent carbon-based materials have attracted increasing attention due to their excellent properties, such as high light absorption, high chemical stability, low toxicity, and good biocompatibility. These materials mainly include carbon quantum dots, nanodiamonds, carbon nanotubes, fullerenes and fluorescent graphene. The superior properties of fluorescent carbon-based materials make them have broad application prospects. Such as biomarkers, medical diagnostics, catalysis and photovoltaic devices, etc. Among them, carbon quantum dots have received the most attention due to their unique photoelectric properties and edge effects caused by quantum confinement. [0003] Various methods for synthesizing carbon quantum dots have been developed, including: pyrolysis, electrochemical exfoli...

Claims

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Application Information

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IPC IPC(8): C01B31/02C09K11/65B82Y30/00B82Y40/00G01N21/64
Inventor 汪建新郑雅文杨旦翁杰冯波周绍兵鲁雄屈树新段可卢晓英智伟
Owner SOUTHWEST JIAOTONG UNIV
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