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Method for preparing full-spectrum fluorescent carbon dots by using one-pot method

A fluorescent carbon dot, full-spectrum technology, applied in chemical instruments and methods, nano-carbon, nano-optics, etc., can solve the problems of no breakthrough in synthesis technology and limit the application of carbon dots, and achieve significant nano-size effect and stable fluorescent optical properties , the effect of high yield

Pending Publication Date: 2020-04-10
SHANGHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In terms of full spectrum coverage, the synthesis technology has not made a breakthrough, which greatly limits the application of carbon dots in many fields.

Method used

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  • Method for preparing full-spectrum fluorescent carbon dots by using one-pot method
  • Method for preparing full-spectrum fluorescent carbon dots by using one-pot method
  • Method for preparing full-spectrum fluorescent carbon dots by using one-pot method

Examples

Experimental program
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Effect test

Embodiment 1

[0034] In this embodiment, a method for preparing spectrally fluorescent carbon dots, using m-phenylenediamine as a precursor, adding aminobenzenesulfonic acid, and growing fluorescent carbon dots by solvothermal method in an organic solvent of toluene, including Follow the steps below:

[0035] a. Add m-phenylenediamine and aminobenzenesulfonic acid in a molar ratio of 2:1, add toluene to dissolve, stir evenly, transfer to a polytetrafluoroethylene reactor, and then transfer the mixed solution to a polytetrafluoroethylene high-pressure In the reaction kettle, a solvothermal reaction was carried out at 120°C for 8 hours to obtain a product mixture;

[0036] b. After the product mixture prepared in the above step a is naturally cooled to room temperature, the product mixture is taken out, then filtered with a 220nm filter membrane, and the filtered solution is transferred to a dialysis bag for dialysis to obtain a carbon dot solution .

[0037] Experimental Analysis Test:

...

Embodiment 2

[0040] This embodiment is basically the same as Embodiment 1, especially in that:

[0041] In this embodiment, a method for preparing spectrally fluorescent carbon dots, using p-phenylenediamine as a precursor, adding ascorbic acid, and growing fluorescent carbon dots by solvothermal method in an ethanol organic solvent, includes the following steps:

[0042] a. Add ethanol to dissolve p-phenylenediamine and ascorbic acid in a molar ratio of 1:1, stir evenly, transfer to a polytetrafluoroethylene reaction kettle, and then transfer the mixed solution into a polytetrafluoroethylene high-pressure reaction kettle , solvothermal reaction was carried out at 170°C for 4 hours to obtain a product mixture;

[0043] b. After the product mixture prepared in the above step a is naturally cooled to room temperature, the product mixture is taken out, then filtered with a 220nm filter membrane, and the filtered solution is transferred to a dialysis bag for dialysis to obtain a carbon dot sol...

Embodiment 3

[0047] This embodiment is basically the same as the previous embodiment, and the special features are:

[0048] In this embodiment, a method for preparing spectrally fluorescent carbon dots, using o-phenylenediamine as a precursor, adding terephthalic acid, and growing fluorescent carbon dots by solvothermal method in an acetone organic solvent, including Follow the steps below:

[0049] a. Add o-phenylenediamine and terephthalic acid in a molar ratio of 1:2, add acetone to dissolve, stir evenly, transfer to a polytetrafluoroethylene reactor, and then transfer the mixed solution to a polytetrafluoroethylene high-pressure In the reaction kettle, a solvothermal reaction was carried out at 200°C for 6 hours to obtain a product mixture;

[0050]b. After the product mixture prepared in the above step a is naturally cooled to room temperature, the product mixture is taken out, then filtered with a 220nm filter membrane, and the filtered solution is transferred to a dialysis bag for...

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Abstract

The invention discloses a method for preparing full-spectrum fluorescent carbon dots by using a one-pot method, wherein aniline is used as a precursor and is added with an organic acid, and growing isperformed in an organic solvent by a solvothermal method to obtain carbon dots with different fluorescence. According to the method, aniline and an organic acid are added into an organic solvent according to a certain ratio, and growing is performed through a solvothermal method at a reaction temperature of 120-250 DEG C for 2-48 hours to obtain carbon dots with different fluorescence; and afterthe reaction, the reaction kettle is naturally cooled to room temperature, and filtering is performed by using a 220 nm filtering membrane to obtain a carbon dot solution. According to the invention,the emission peak wavelength of the carbon dot synthesized by the method is 450-700 nm, the fluorescence emission peak of the carbon dot is hardly changed along with the change of the excitation wavelength, and the carbon dot has the characteristics of high fluorescence quantum yield and stable fluorescence intensity; and the preparation method has the advantages of simple synthesis steps, short period and high yield.

Description

technical field [0001] The invention relates to a preparation method of carbon nanometer material, in particular to a preparation method of fluorescent carbon nanometer material, which is applied in the technical field of fluorescent carbon nanometer material. Background technique [0002] There are many lights in the natural world where human beings live, and the spectrum that can be perceived by the eyes is called visible light. Its wavelength range is roughly between 400-760nm, and can be divided into red, orange, yellow, green, cyan, blue and purple monochromatic light. Fluorescence can also be separated from these 7 kinds of monochromatic fluorescence. The field of optoelectronic devices requires stable fluorescence in the blue, green and yellow regions, and the field of biological cell imaging and in vivo imaging requires long-wavelength red fluorescence. In view of the industrial demand for full-spectrum fluorescence, it is very urgent to realize the preparation of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/65C01B32/15B82Y20/00B82Y40/00
CPCC09K11/65C01B32/15B82Y20/00B82Y40/00
Inventor 王亮李伟涛李高陈铿韩禹吴明红
Owner SHANGHAI UNIV
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