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A nitrogen-doped green fluorescent carbon quantum dot and its preparation method and application

A carbon quantum dot and green fluorescence technology, which is applied in the field of nitrogen-doped green fluorescent carbon quantum dots and their preparation, can solve the problems of low detection limit in preparation and the like, and achieves the advantages of cheap and easily available raw materials, simple and effective synthesis method, and easy promotion. Effect

Active Publication Date: 2022-05-20
SHANXI UNIV
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

In addition, the colorimetric method has the advantages of easy signal output, fast response, and simple operation, and can realize on-site portable detection of analytes. However, there are few reports on the use of fluorescence colorimetric methods to detect curcumin.
Therefore, it is a challenge to prepare carbon dots with low detection limit and capable of colorimetric detection of curcumin

Method used

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  • A nitrogen-doped green fluorescent carbon quantum dot and its preparation method and application
  • A nitrogen-doped green fluorescent carbon quantum dot and its preparation method and application
  • A nitrogen-doped green fluorescent carbon quantum dot and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Step 1, at room temperature, dissolve 0.1000g of dopamine and 2mL of ethylenediamine in 20ml of water, stir well, and sonicate to obtain a clear solution.

[0020] Step 2, transfer the solution to a 50ml hydrothermal reaction kettle.

[0021] Step 3, put the hydrothermal kettle in an oven, and react at 200°C for 10 hours.

[0022] Step 4, the product is filtered with filter paper to remove macromolecular particles, and the obtained solution is dialyzed in deionized water for 6 hours through a 500 Da dialysis membrane.

[0023] In step 5, the fluorescent carbon quantum dot aqueous solution is freeze-dried to obtain the fluorescent carbon quantum dot, and its relative quantum yield (taking quinine sulfate as a standard) is 1.6%.

[0024] Characterization of the prepared fluorescent carbon quantum dots:

[0025] The ultraviolet absorption spectrum and the fluorescence emission spectrum of the above-mentioned prepared carbon quantum dots, see figure 1 ;

[0026] The inf...

Embodiment 2

[0031] Except that the quality of sodium tetraborate is 0.0600g, others are all the same as in Example 1. Its relative quantum yield (based on quinine sulfate) is 0.52%.

Embodiment 3

[0033] Except that the quality of sodium tetraborate is 0.0800g, others are all the same as in Example 1. Its relative quantum yield (based on quinine sulfate) is 1.02%.

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Abstract

The invention provides a nitrogen-doped green fluorescent carbon quantum dot and its preparation method and application. Preparation method: Dissolve dopamine and ethylenediamine in water and react at 170-200°C for 6-10 hours to synthesize green fluorescent carbon dots. The method for preparing carbon dots has a simple process, wide sources of raw materials, convenient price, and low requirements for preparation conditions. The prepared carbon quantum dots can be used as fluorescent probes for colorimetric detection of curcumin.

Description

technical field [0001] The invention relates to carbon luminescent nanomaterials, in particular to carbon quantum dots, and specifically provides a nitrogen-doped green fluorescent carbon quantum dot and its preparation method and application. Background technique [0002] Curcumin (curcumin, Cur), 1,7-bis-(4-hydroxy-3-methoxyphenyl)-1,6-heptadiene-2,5-dione, is a natural polyphenol pigment , from the powdered rhizome of turmeric. Cur has attracted great attention due to its biological and pharmacological activities, such as antioxidant, anticancer, anti-inflammatory, antibacterial, and antidiabetic effects. Conventional analytical methods currently used to determine Cur include voltammetry, high-performance thin-layer chromatography (HPTLC), high-performance liquid chromatography (HPLC), ultra-high performance liquid chromatography (UHPLC), liquid chromatography-tandem mass spectrometry (LC- MS / MS) and spectrophotometry. Although these methods have good accuracy and sele...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K11/65C01B32/15B82Y20/00B82Y40/00G01N21/64
CPCC09K11/65C09K11/0883C01B32/15B82Y20/00B82Y40/00G01N21/6402G01N21/6428G01N21/643G01N2021/6432
Inventor 闫娅楠宋胜梅孟雅婷张慧林双少敏董川
Owner SHANXI UNIV