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A method for regulating the fluorescence emission wavelength of carbon quantum dots and carbon quantum dots

A technology of carbon quantum dots and fluorescence emission, which is applied to the regulation of the emission wavelength of carbon quantum dots, the field of carbon quantum dots

Active Publication Date: 2021-01-29
XIAMEN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] In order to solve the problem of regulating the fluorescence emission wavelength of carbon quantum dots in an efficient and environmentally friendly manner, the inventors found that phosphoric acid can be used as a chemical modification regulator to modify the surface functional groups of carbon quantum dots, so that the emission wavelength of carbon quantum dots can be moved to the short-wave direction , while changing the fluorescence color of carbon quantum dots to the blue direction

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  • A method for regulating the fluorescence emission wavelength of carbon quantum dots and carbon quantum dots
  • A method for regulating the fluorescence emission wavelength of carbon quantum dots and carbon quantum dots
  • A method for regulating the fluorescence emission wavelength of carbon quantum dots and carbon quantum dots

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Embodiment 1

[0038] This embodiment takes carbon quantum dots with green fluorescence as the implementation object. The carbon quantum dots have good fluorescence characteristics. After testing, the maximum emission wavelength of the carbon quantum dots at an excitation wavelength of 380nm appears at 520nm, and at 380nm It exhibits bright green fluorescence under ultraviolet light irradiation.

[0039] Follow the steps below to adjust the fluorescence emission wavelength of carbon quantum dots:

[0040] (1) Prepare and heat the carbon quantum dot solution: add 250 mg of carbon quantum dots to 500 mL of deionized water to form a carbon quantum dot solution, place the carbon quantum dot solution in a heating furnace at 80 ° C and continue heating, and the heating process continues Stir.

[0041] (2) Add modification modifier: Measure 120mL of phosphoric acid in a beaker and add it dropwise to the carbon quantum dot solution at a rate of 10ml / min. After the addition is complete, heat the sol...

Embodiment 2

[0045] This embodiment takes carbon quantum dots with green fluorescence as the implementation object. The carbon quantum dots have good fluorescence characteristics. After testing, the maximum emission wavelength of the carbon quantum dots at an excitation wavelength of 380nm appears at 520nm, and at 380nm It exhibits bright green fluorescence under ultraviolet light irradiation.

[0046] Follow the steps below to adjust the fluorescence emission wavelength of carbon quantum dots:

[0047] (1) Prepare and heat the carbon quantum dot solution: add 250 mg of carbon quantum dots to 500 mL of deionized water to form a carbon quantum dot solution, place the carbon quantum dot solution in a heating furnace at 80 ° C and continue heating, and the heating process continues Stir.

[0048] (2) Add modification regulator: Measure 180mL of phosphoric acid in a beaker and add it dropwise to the carbon quantum dot solution at a rate of 10ml / min. After the addition is completed, heat the s...

Embodiment 3

[0052] This embodiment takes carbon quantum dots with green fluorescence as the implementation object. The carbon quantum dots have good fluorescence characteristics. After testing, the maximum emission wavelength of the carbon quantum dots at an excitation wavelength of 380nm appears at 520nm, and at 380nm It exhibits bright green fluorescence under ultraviolet light irradiation.

[0053] Follow the steps below to adjust the fluorescence emission wavelength of carbon quantum dots:

[0054] (1) Prepare and heat the carbon quantum dot solution: add 250 mg of carbon quantum dots to 500 mL of deionized water to form a carbon quantum dot solution, place the carbon quantum dot solution in a heating furnace at 80 ° C and continue heating, and the heating process continues Stir.

[0055] (2) Add modification modifier: Measure 230mL of phosphoric acid in a beaker and add it dropwise to the carbon quantum dot solution at a rate of 10ml / min. After the addition is complete, heat the sol...

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Abstract

The invention relates to a method for regulating the fluorescence emission wavelength of carbon quantum dots. Phosphoric acid is used as a modification regulator to modify the functional groups on the surface of carbon quantum dots to change the fluorescence emission wavelength of carbon quantum dots. The present invention uses phosphoric acid as a chemical modification regulator to modify the surface functional groups of carbon quantum dots, which can effectively regulate the emission wavelength of carbon quantum dots and obtain carbon quantum dots with different fluorescent colors. The method is simple, efficient, and environmentally friendly.

Description

technical field [0001] The invention relates to the field of performance regulation and chemical modification of nanomaterials, in particular to a method for regulating the fluorescence emission wavelength of carbon quantum dots and the carbon quantum dots. Background technique [0002] Carbon quantum dots (CDs) are a new type of carbon-based zero-dimensional materials with excellent optical properties, good water solubility, non-toxic effects, environmental friendliness, wide source of raw materials, low cost, high efficiency, and good biocompatibility and many other advantages. In particular, carbon quantum dots have photoluminescent properties, that is, they will emit bright fluorescence in the carbon quantum dot solution under light, and have good optical stability. This characteristic makes carbon quantum dots useful in biological imaging, medical diagnosis, Catalysis and photovoltaic devices have broad application prospects. [0003] At present, carbon quantum dots c...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K11/65B82Y20/00
CPCB82Y20/00C09K11/70
Inventor 古思勇张子豪黄晓宇朱泽林
Owner XIAMEN UNIV OF TECH