Fluorine-doped fluorescent carbon quantum dot preparing method

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 high energy consumption, complicated preparation process, low yield, etc., and achieve good photostability, good The effect of applying the foreground

Active Publication Date: 2016-05-11
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In view of the shortcomings of low yield, high energy consumption and complicated preparation process in the current preparation method of fluorinated graphene quantum dots, the purpose of the present invention is to provide fluorine-doped fluorescent carbon quantum dots with a yield of tens of milligrams or even hundreds of milligrams to meet the requirements for fluorine Demand for Doped Fluorescent Carbon Quantum Dots

Method used

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  • Fluorine-doped fluorescent carbon quantum dot preparing method
  • Fluorine-doped fluorescent carbon quantum dot preparing method
  • Fluorine-doped fluorescent carbon quantum dot preparing method

Examples

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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 passed through a filter membrane with a pore size of 0.22 μm to remove large particles, and the obtained filtrate is added to a dialysis bag for dialysis (molecular weight cut-off is 500D), the dialysis fluid is deionized water, and the dialysis time is 2 - 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 drying oven for 48 hours to obtain a fluorine-doped fluorescent carbon quantum dot product. The product mass obtained was 19.8 mg.

[0029] The...

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 passed through a filter membrane with a pore size of 0.22 μm to remove large particles, and the obtained filtrate is added to a dialysis bag for dialysis (molecular weight cut-off is 500D), the dialysis fluid is deionized water, and the dialysis time is 2 - 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 drying 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 removed large particles through a filter membrane with a pore size of 0.22 μm, and the obtained filtrate is added to a dialysis bag for dialysis (molecular weight cut-off is 500D), and the dialysis fluid is deionized water, and the dialysis time is 2 - 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 drying 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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Abstract

The invention relates to a fluorine-doped fluorescent carbon quantum dot preparing method. The method comprises the steps of adding 7-250 mmol / L glucose dispersion liquid into a polytetrafluoroethylene hydrothermal reaction still, and then adding hydrofluoric acid solution, wherein the volume ratio of the hydrofluoric acid solution to the glucose dispersion liquid is 2.5-12.5%; placing the reaction still in a muffle furnace for reaction lasting 6-24 h at 160-210 DEG C; making the obtained solution pass through a filter membrane with bore diameter of 0.22 micron to remove large particles, and adding obtained filtrate into a dialysis bag for dialysis, wherein deionized water serves as dialyzate and dialysis time is 2-7 days; transferring the product in the dialysis bag into a flask, and removing solvent through reduced pressure distillation; placing the solid in a vacuum drying oven to be dried for 48 h, so that a fluorine-doped fluorescent carbon quantum dot product is obtained. According to the method, operation is easy, sources of raw materials are wide, cost is low, yield is high, and chemical stability is high. The method can be applied to fields including photocatalysis, bioimaging and biochemical analysis.

Description

technical field [0001] The invention relates to a method for preparing fluorine-doped fluorescent carbon quantum dots, in particular to a method for preparing fluorine-containing carbon quantum dots with luminescent properties. Background technique [0002] Fluorescent carbon quantum dots are an emerging material among fluorescent materials, and they are zero-dimensional materials. Compared with traditional semiconductor quantum dots and organic dyes, fluorescent carbon quantum dots have a series of advantages, such as: excellent water solubility, chemical stability, photobleaching resistance, low toxicity, better biocompatibility, etc. . These excellent characteristics make fluorescent carbon quantum dots have very important application value in the fields of photocatalysis, bioimaging and biochemical analysis. [0003] In order to adjust the performance of fluorescent carbon quantum dots and expand its application range, the introduction of heteroatoms (such as nitrogen,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/65B82Y40/00B82Y20/00
CPCB82Y20/00B82Y40/00C09K11/65
Inventor 封伟龙鹏冯奕钰李瑀
Owner TIANJIN UNIV
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