Method for preparing 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: 2019-11-12
UNIV OF JINAN
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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.

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  • Method for preparing cerium sulfide doped carbon quantum dot nano fluorescent material
  • Method for preparing cerium sulfide doped carbon quantum dot nano fluorescent material
  • Method for preparing cerium sulfide doped carbon quantum dot nano fluorescent material

Examples

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Effect test

Embodiment 1

[0022] (1) Preparation of liquid A: In the reactor, add deionized water: 64 mL, itaconic acid: 34 g, cerium trichloride: 2 g, stir and dissolve to obtain liquid A;

[0023] (2) Preparation of liquid B: In the reactor, add deionized water: 93 mL, thioacetamide: 7 g, stir and dissolve to obtain liquid B;

[0024] (3) Preparation of crude cerium sulfide-doped carbon quantum dot nano-fluorescent material: Add liquid A: 50 mL into the reactor, stir, add dropwise liquid B: 10 mL to liquid A, dropwise, 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 22 hours to obtain a red suspension liquid, which is separated from the solid and liquid. The liquid is crude cerium sulfide doped carbon quantum dot nano-fluorescent material ;

[0025] (4) Purification of cerium sulfide-doped carbon quantum dot nano-fluorescent material: inject the liquid obtained in step (3) in...

Embodiment 2

[0027] (1) Preparation of liquid A: In the reactor, add deionized water: 62 mL, itaconic acid: 35.5 g, cerium trichloride: 2.5 g, stir and dissolve to obtain liquid A;

[0028] (2) Preparation of liquid B: In the reactor, add deionized water: 92 mL, thioacetamide: 8 g, stir and dissolve to obtain liquid B;

[0029] (3) Preparation of crude cerium sulfide-doped carbon quantum dot nano-fluorescent material: Add liquid A: 100 mL into the reactor, stir, add dropwise liquid B: 20 ​​mL to liquid A, dropwise, 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 hours to obtain a red suspension liquid, which is separated from the solid and liquid. The liquid is crude cerium sulfide doped carbon quantum dot nano fluorescent material ;

[0030] (4) Purification of cerium sulfide-doped carbon quantum dot nano-fluorescent material: inject the liquid obtained in step...

Embodiment 3

[0032] (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;

[0033] (2) Preparation of liquid B: In the reactor, add deionized water: 94 mL, thioacetamide: 6 g, stir and dissolve to obtain liquid B;

[0034] (3) Preparation of crude cerium sulfide-doped carbon quantum dot nano-fluorescent material: Add liquid A: 150 mL into the reactor, stir, add liquid B: 30 mL to liquid A, dropwise, 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 24 hours to obtain a red suspension liquid, which is separated from the solid and liquid. The liquid is crude cerium sulfide doped carbon quantum dot nano-fluorescent material ;

[0035] (4) Purification of cerium sulfide-doped carbon quantum dot nano-fluorescent material: inject the liquid obtained in step (3) into a di...

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Abstract

The invention discloses a method for preparing a cerium sulfide doped carbon quantum dot nano fluorescent material. The method is characterized in that: the method includes preparing an A solution from deionized water, itaconic acid and cerium trichloride; preparing a B solution from deionized water and thioacetamide; adding the A solution into a reactor, and stirring the A solution; adding the Bsolution dropwise into the A solution, with the volume ratio of the A solution to the B solution being 5:1; stirring and reacting the mixture for 30 min after the dropwise addition is finished; transferring the mixture to a reaction kettle, covering the kettle with a sealing cover, and putting the kettle into a thermostat; reacting the mixture at a constant temperature of 180 +/-2 DEG C for 20-24h to obtain a red suspension liquid; performing solid liquid separation to obtain liquid that is a crude product of the cerium sulfide doped carbon quantum dot nano fluorescent material; and purifyingthe material through a dialysis manner. The method is green and simple to operate, and the material can have high fluorescence stability, a small and uniform size, good biocompatibility and other characteristics without the need of secondary modification.

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 Applications(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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