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Preparation method of nano europium sulfide/nitrogen codoped carbon quantum dots

A technology of carbon quantum dots and europium sulfide, which is applied in the field of nano-luminescent material preparation, can solve the problems of inability to accurately control lateral size and surface chemistry, low fluorescence quantum yield of synthetic methods, unclear light-emitting mechanism, etc., and achieve stable fluorescence performance. High performance, high quantum yield, good biocompatibility

Inactive Publication Date: 2019-12-03
UNIV OF JINAN
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  • Summary
  • 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.

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  • Preparation method of nano europium sulfide/nitrogen codoped carbon quantum dots
  • Preparation method of nano europium sulfide/nitrogen codoped carbon quantum dots
  • Preparation method of nano europium sulfide/nitrogen codoped carbon quantum dots

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Embodiment 1

[0021] (1) Preparation of liquid A: In the reactor, add deionized water: 145mL, triethylamine: 18g, rutin: 36g, heat to dissolve, then add europium trichloride: 4g, stir to dissolve, and obtain liquid A ;

[0022] (2) Preparation of liquid B: in the reactor, add deionized water: 78mL, ammonium sulfide: 22g, stir and dissolve to obtain liquid B;

[0023] (3) Preparation of crude nano-europium sulfide / nitrogen co-doped carbon quantum dots: add liquid A: 100mL to the reactor, stir, drop liquid B: 5mL into liquid A, stir for 10min, transfer to the reactor , cover the sealing cover, place it in an incubator, keep the temperature at 200±2°C, and react for 26 hours to obtain a red suspension liquid, which is separated from solid and liquid, and the liquid is nano europium sulfide / nitrogen co-doped carbon quantum dots;

[0024] (4) Purification of nano europium sulfide / nitrogen co-doped carbon quantum dots: inject the liquid obtained in step (3) into a dialysis bag for dialysis, the ...

Embodiment 2

[0026] (1) Preparation of liquid A: In the reactor, add deionized water: 220mL, triethylamine: 18g, rutin: 60g, heat to dissolve, then add europium trichloride: 3g, stir and dissolve to obtain liquid A ;

[0027] (2) Preparation of liquid B: in the reactor, add deionized water: 76mL, ammonium sulfide: 24g, stir and dissolve to obtain liquid B;

[0028] (3) Preparation of crude nano europium sulfide / nitrogen co-doped carbon quantum dots: add liquid A: 200mL to the reactor, stir, dropwise add liquid B: 10mL to liquid A, stir for 10min, transfer to the reaction kettle , cover the sealing cover, place it in an incubator, keep the temperature at 200±2°C, and react for 24 hours to obtain a red suspension liquid, which is separated from solid and liquid, and the liquid is nano europium sulfide / nitrogen co-doped carbon quantum dots;

[0029] (4) Purification of nano europium sulfide / nitrogen co-doped carbon quantum dots: inject the liquid obtained in step (3) into a dialysis bag for ...

Embodiment 3

[0031] (1) Preparation of liquid A: In the reactor, add deionized water: 210mL, triethylamine: 30g, rutin: 48g, heat to dissolve, then add europium trichloride: 9g, stir and dissolve to obtain liquid A ;

[0032] (2) Preparation of liquid B: in the reactor, add deionized water: 80mL, ammonium sulfide: 20g, stir and dissolve to obtain liquid B;

[0033] (3) Preparation of crude nano europium sulfide / nitrogen co-doped carbon quantum dots: add liquid A: 120mL to the reactor, stir, dropwise add liquid B: 6mL to liquid A, stir for 10min, transfer to the reactor , cover the sealing cover, place it in an incubator, keep the temperature at 200±2°C, and react for 28 hours to obtain a red suspension liquid, which is separated from solid and liquid, and the liquid is nano europium sulfide / nitrogen co-doped carbon quantum dots;

[0034] (4) Purification of nano europium sulfide / nitrogen co-doped carbon quantum dots: inject the liquid obtained in step (3) into a dialysis bag for dialysis,...

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Abstract

The invention discloses a preparation method of nano europium sulfide / nitrogen codoped carbon quantum dots. The preparation method is characterized by comprising the following steps: preparing liquidA from deionized water, triethylamine and rutin; preparing liquid B from deionized water and ammonium sulfide; adding the liquid A into a reactor, stirring, and dropwise adding the liquid B into the liquid A under the condition that the volume ratio of the liquid A to the liquid B is 20: 1, after dropwise addition, stirring for reaction for 10 min, transferring the liquid to a reaction kettle, maintaining the liquid in the reaction kettle at the constant temperature of 200+ / - 2 DEG C, reacting for 24-28 h to obtain red suspension liquid, and carrying out solid-liquid separation, wherein the liquid is crude nano europium sulfide / nitrogen co-doped carbon quantum dots; and purifying the nano-europium sulfide / nitrogen codoped carbon quantum dots by dialysis. The preparation method has the characteristics of environmental friendliness, simplicity in operation, no need of secondary modification of the nano europium sulfide / nitrogen codoped carbon quantum dots, high fluorescence performance stability, small and uniform size, good biocompatibility and the like.

Description

technical field [0001] The invention belongs to the technical field of preparation of nano-luminescent materials, in particular to a preparation method and fluorescent performance of nano-europium sulfide / nitrogen co-doped carbon quantum dots. 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 methods are ofte...

Claims

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Application Information

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IPC IPC(8): C09K11/65B82Y20/00B82Y30/00
CPCC09K11/65C09K11/7701B82Y20/00B82Y30/00
Inventor 李慧芝陈亚明王建荣
Owner UNIV OF JINAN