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Preparation method and application of hollow orange fluorescent carbon nanoparticles

A carbon nanoparticle, orange technology, applied in the direction of fluorescence/phosphorescence, chemical instruments and methods, luminescent materials, etc., to achieve the effect of broad application prospects

Active Publication Date: 2020-04-21
SHANXI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But now, the research of hollow fluorescent carbon nanoparticles is still in its infancy, so finding a simple and convenient method to synthesize hollow fluorescent carbon nanoparticles is of great significance for its application in various fields

Method used

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  • Preparation method and application of hollow orange fluorescent carbon nanoparticles
  • Preparation method and application of hollow orange fluorescent carbon nanoparticles
  • Preparation method and application of hollow orange fluorescent carbon nanoparticles

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Preparation of hollow orange fluorescent carbon nanoparticles:

[0028] (1) Add 0.2g of 5-aminosalicylic acid to 20mL of deionized water to obtain a suspension;

[0029] (2) Transfer the suspension obtained in (1) to a hydrothermal reaction kettle, and conduct a hydrothermal reaction at 220° C. for 4 hours;

[0030] (3) Centrifuge the product obtained in (2) with a centrifuge at 4000r / min for 20min to remove insoluble matter to obtain a clear brown solution, dialyze for 24h with a dialysis bag with a molecular weight cut-off of 500-1000Da, and obtain a hollow orange fluorescent carbon nanoparticle aqueous solution ;

[0031] (4) Freeze-dry the aqueous solution of hollow orange fluorescent carbon nanoparticles obtained in (3) to obtain hollow orange fluorescent carbon nanoparticles, and the fluorescence quantum yield (based on rhodamine B) is 6.9%.

[0032] The transmission electron microscope images and size distribution images of the prepared hollow orange fluorescen...

Embodiment 2

[0039] Preparation of hollow orange fluorescent carbon nanoparticles:

[0040] (1) Add 0.4g of 5-aminosalicylic acid to 20mL of deionized water to obtain a suspension;

[0041] (2) Transfer the suspension obtained in (1) to a hydrothermal reaction kettle, and conduct a hydrothermal reaction at 200° C. for 5 hours;

[0042] (3) Centrifuge the product obtained in (2) with a centrifuge at 4000r / min for 20min to remove insoluble matter to obtain a clear brown solution, dialyze for 24h with a dialysis bag with a molecular weight cut-off of 500-1000Da, and obtain a hollow orange fluorescent carbon nanoparticle aqueous solution ;

[0043] (4) Freeze-dry the aqueous solution of hollow orange fluorescent carbon nanoparticles obtained in (3) to obtain hollow orange fluorescent carbon nanoparticles, and the fluorescence quantum yield (based on rhodamine B) is 4.7%.

Embodiment 3

[0045] Preparation of hollow orange fluorescent carbon nanoparticles:

[0046] (1) Add 0.1 g of 5-aminosalicylic acid to 20 mL of deionized water to obtain a suspension;

[0047] (2) Transfer the suspension obtained in (1) to a hydrothermal reaction kettle, and conduct a hydrothermal reaction at 230° C. for 3 hours;

[0048] (3) Centrifuge the product obtained in (2) with a centrifuge at 4000r / min for 20min to remove insoluble matter to obtain a clear brown solution, dialyze it with a dialysis bag with a molecular weight cut-off of 500-1000Da for 18h, and obtain a hollow orange fluorescent carbon nanoparticle aqueous solution ;

[0049] (4) Freeze-dry the aqueous solution of hollow orange fluorescent carbon nanoparticles obtained in (3) to obtain hollow orange fluorescent carbon nanoparticles, and the fluorescence quantum yield (based on rhodamine B) is 3.3%.

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Abstract

The invention provides a preparation method of hollow orange-color fluorescent carbon nano-particles and belongs to the field of preparing fluorescent nano materials. The preparation method includes the steps of: 1) adding 5-aminosalicylic acid to deionized water with stirring to produce a suspension liquid; 2) moving the suspension liquid into a hydrothermal reaction kettle to perform a hydrothermal reaction; 3) centrifuging a product to remove undissolved substances and performing dialysis to remove impurities, thus producing a hollow orange-color fluorescent carbon nano-particle water solution; 4) freeze-drying the solution to obtain the hollow orange-color fluorescent carbon nano-particles. The preparation method is simple in processes and low in demands on preparation condition. The hollow orange-color fluorescent carbon nano-particles are low in toxicity and high in fluorescent quantum yield, and can be used for pH sensing in living cells and fingerprint detection.

Description

technical field [0001] The invention relates to fluorescent nanometer materials, in particular to a method for preparing hollow orange fluorescent carbon nanoparticles, and the prepared hollow orange fluorescent carbon nanoparticles are used for pH sensing and fingerprint detection in living cells. Background technique [0002] In 2004, scientists from Clemson University in the United States produced a carbon nanoparticle that can emit bright fluorescence under light (J.Am.Chem.Soc., 2004, 126, 12736-12737). Fluorescent carbon nanoparticles are a new class of luminescent materials, which represent a new research platform and are of great value both in theory and in application. Fluorescent carbon nanoparticles have unique advantages, such as high chemical stability, no light flicker, resistance to photobleaching, nontoxicity, low cost, and excellent biocompatibility. Fluorescent carbon nanoparticles overcome the defects of luminescent inorganic semiconductor nanoparticles c...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K11/65G01N21/64
Inventor 石利红李林双少敏董川
Owner SHANXI UNIV
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