A kind of preparation method of cerium sulfide doped carbon quantum dot nano fluorescent material

A technology of carbon quantum dots and nano-fluorescence, which is applied in the field of preparation of nano-luminescent materials, can solve the problems of inability to accurately control the lateral size and surface chemistry, the low fluorescence quantum yield of the synthesis method, and the unclear luminescence mechanism, etc., and achieve the improvement of fluorescence performance , Uniform size, good biocompatibility

Active Publication Date: 2022-03-08
UNIV OF JINAN
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the current research on fluorescent C-Dots nanomaterials is still in its infancy, and there are still some urgent scientific research problems to be solved. For example, the yield and fluorescence quantum yield (QY) of existing synthesis methods are often relatively low, and it is impossible to accurately control its lateral direction. Size and surface chemistry, unclear luminescence mechanism, narrow fluorescence spectral range, etc.

Method used

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  • A kind of preparation method of cerium sulfide doped carbon quantum dot nano fluorescent material
  • A kind of preparation method of cerium sulfide doped carbon quantum dot nano fluorescent material
  • A kind of preparation method of cerium sulfide doped carbon quantum dot nano fluorescent material

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Experimental program
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Effect test

Embodiment 1

[0021] (1) Preparation of liquid A: In the reactor, add deionized water: 64mL, itaconic acid: 34g, cerium trichloride: 2g, stir and dissolve to obtain liquid A;

[0022] (2) Preparation of liquid B: in the reactor, add deionized water: 93mL, thioacetamide: 7g, stir and dissolve to obtain liquid B;

[0023] (3) Preparation of crude product cerium sulfide doped carbon quantum dot nano fluorescent material: add liquid A: 50mL in the reactor, stir, dropwise add liquid B: 10mL to liquid A, dropwise, stir for 30min, transfer to In the reaction kettle, cover the sealed cover, place it in a constant temperature box, keep the temperature at 180±2°C, and react for 22 hours to obtain a red suspension liquid, which is separated from the solid and liquid, and the liquid is crude cerium sulfide doped carbon quantum dot nano-fluorescent material;

[0024] (4) Purification of cerium sulfide-doped carbon quantum dot nano fluorescent material: the liquid obtained in step (3) is injected into a ...

Embodiment 2

[0026] (1) Preparation of liquid A: In the reactor, add deionized water: 62mL, itaconic acid: 35.5g, cerium trichloride: 2.5g, stir and dissolve to obtain liquid A;

[0027] (2) Preparation of liquid B: in the reactor, add deionized water: 92mL, thioacetamide: 8g, stir and dissolve to obtain liquid B;

[0028] (3) Preparation of crude product cerium sulfide doped carbon quantum dot nano fluorescent material: add liquid A: 100mL in the reactor, stir, dropwise add liquid B: 20mL to liquid A, dropwise, stir for 30min, transfer to In the reaction kettle, cover the sealed cover, place it in an incubator, keep the temperature at 180±2°C, and react for 20 hours to obtain a red suspension liquid, which is separated from the solid and liquid, and the liquid is crude cerium sulfide doped carbon quantum dot nano-fluorescence material;

[0029] (4) Purification of cerium sulfide-doped carbon quantum dot nano fluorescent material: the liquid obtained in step (3) is injected into a dialysis...

Embodiment 3

[0031] (1) Preparation of liquid A: In the reactor, add deionized water: 66mL, itaconic acid: 32.5g, cerium trichloride: 1.5g, stir and dissolve to obtain liquid A;

[0032] (2) Preparation of liquid B: In the reactor, add deionized water: 94mL, thioacetamide: 6g, stir and dissolve to obtain liquid B;

[0033] (3) Preparation of crude product cerium sulfide doped carbon quantum dot nano fluorescent material: add liquid A: 150mL in the reactor, stir, dropwise add liquid B: 30mL to liquid A, dropwise, stir for 30min, transfer to In the reaction kettle, cover the sealed cover, place it in a constant temperature box, keep the temperature at 180±2°C, and react for 24 hours to obtain a red suspension liquid, which is separated from the solid and liquid, and the liquid is crude cerium sulfide doped carbon quantum dot nano fluorescent material;

[0034] (4) Purification of cerium sulfide-doped carbon quantum dot nano fluorescent material: the liquid obtained in step (3) is injected in...

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Abstract

The invention discloses a preparation method of cerium sulfide-doped carbon quantum dot nano fluorescent material, which is characterized in that liquid A is prepared by using deionized water, itaconic acid and cerium trichloride; deionized water, thioethyl Amide, prepared to obtain liquid B; then, add liquid A to the reactor and stir, add liquid B dropwise to liquid A, the volume ratio of liquid A to liquid B is 5:1, after the dropwise addition, stir for 30 minutes, transfer Put it into the reaction kettle, cover the sealed cover, place it in a constant temperature box, keep the temperature at 180±2°C, and react for 20 to 24 hours to obtain a red suspension liquid, which is separated from the solid and liquid, and the liquid is crude cerium sulfide doped carbon quantum dot nano Fluorescent material; dialysis method is used to purify cerium sulfide doped carbon quantum dot nano fluorescent material. The preparation method has the advantages of green environmental protection, simple operation, and the cerium sulfide doped carbon quantum dot nano fluorescent material does not need secondary modification, and has the characteristics of high stability of fluorescence performance, small and uniform size, good biocompatibility and the like.

Description

technical field [0001] The invention belongs to the technical field of nano-luminescent material preparation, and in particular relates to a preparation method and fluorescent performance of a cerium sulfide-doped carbon quantum dot nano-luminescent material. Background technique [0002] As an emerging nanomaterial, carbon quantum dots (C-Dots) have the advantages of good biocompatibility, non-toxicity, small particle size, adjustable emission spectrum, high fluorescence stability and photobleaching resistance, and the raw materials are cheap. And the characteristics of rich sources, easy preparation and modification make its preparation and application become one of the hot research fields of analytical chemistry in recent years. However, the current research on fluorescent C-Dots nanomaterials is still in its infancy, and there are still some urgent scientific research problems to be solved. For example, the yield and fluorescence quantum yield (QY) of existing synthesis ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K11/84B82Y20/00B82Y30/00B82Y40/00
CPCC09K11/7716B82Y20/00B82Y30/00B82Y40/00
Inventor 李慧芝赵可贤李志英
Owner UNIV OF JINAN
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