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Preparation method of fluorescent carbon dots

A technology of carbon quantum dots and fluorescence, which is applied in the field of nanomaterial preparation, can solve the problems of restricting the mass production of carbon quantum dots, unfavorable practical application, and high cost of raw materials, and achieve low cost, easy acquisition, and good biocompatibility

Inactive Publication Date: 2019-08-30
LINGNAN NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] In recent years, extensive research work has focused on the synthesis of carbon quantum dots with different emission properties and synergistic effects. The specific methods include arc discharge treatment, electrochemical exfoliation, laser ablation and chemical oxidation, etc., but these methods exist However, problems such as high cost of raw materials, complicated process, harsh synthesis conditions or high energy dependence are not conducive to the practical application in production and life, and severely limit the large-scale production of carbon quantum dots.

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  • Preparation method of fluorescent carbon dots
  • Preparation method of fluorescent carbon dots
  • Preparation method of fluorescent carbon dots

Examples

Experimental program
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Effect test

Embodiment 1

[0024] Use cyanobacteria powder as raw material, dry it at 80°C for 40 hours until the water content of cyanobacteria powder drops below 20%, and obtain dried cyanobacteria powder, and then screen the dried cyanobacteria powder with a stainless steel sieve with a pore size of 60mm. Obtain the cyanobacteria powder after screening, the weight of the cyanobacteria powder after screening is 0.2g, the cyanobacteria powder after screening mixes with 25mL pure water, stirs, obtains the mixture, transfers the mixture to the autoclave that polytetrafluoroethylene is housed, and pressurizes The capacity of the kettle was set to 50mL, heated at 120°C for 12 hours, cooled to room temperature after heating, and the reactants were collected. The reactants were filtered through a microporous membrane with a pore size of 0.22µm to remove large particles, and then dialysis The bag was dialyzed to remove all reaction residues and by-products. The dialyzing time was 36 h. Finally, it was processe...

Embodiment 2

[0026] Use cyanobacteria powder as raw material, dry it at 80°C for 40 hours until the water content of cyanobacteria powder drops below 20%, and obtain dried cyanobacteria powder, and then screen the dried cyanobacteria powder with a stainless steel sieve with a pore size of 60mm. Obtain the cyanobacteria powder after screening, the weight of the cyanobacteria powder after screening is 0.5g, the cyanobacteria powder after screening mixes with 25mL pure water, stirs, obtains the mixture, transfers the mixture to the autoclave that polytetrafluoroethylene is housed, and pressurizes The capacity of the kettle was set to 50mL, heated at 120°C for 12 hours, cooled to room temperature after heating, and the reactants were collected. The reactants were filtered through a microporous membrane with a pore size of 0.22µm to remove large particles, and then dialysis The bag was dialyzed to remove all reaction residues and by-products. The dialyzing time was 36 h. Finally, it was processe...

Embodiment 3

[0028] Use cyanobacteria powder as raw material, dry it at 80°C for 40 hours until the water content of cyanobacteria powder drops below 20%, and obtain dried cyanobacteria powder, and then screen the dried cyanobacteria powder with a stainless steel sieve with a pore size of 60mm. Obtain the cyanobacteria powder after screening, the weight of the cyanobacteria powder after screening is 0.5g, the cyanobacteria powder after screening mixes with 25mL pure water, stirs, obtains the mixture, transfers the mixture to the autoclave that polytetrafluoroethylene is housed, and pressurizes The capacity of the kettle was set to 50mL, heated at 180°C for 12 hours, cooled to room temperature after heating, and the reactants were collected. The reactants were filtered through a microporous membrane with a pore size of 0.22µm to remove large particles, and then dialysis The bag was dialyzed to remove all reaction residues and by-products. The dialyzing time was 36 h. Finally, it was processe...

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Abstract

The invention relates to the technical field of nanomaterial preparation. A preparation method of fluorescent carbon dots comprises the following steps: drying blue algae powder as a raw material at 80 DEG C for 40 h until the water content of the blue algae powder falls to be 20% or lower to obtain dried blue algae powder; screening the dried blue algae powder with a stainless steel screen with pore diameter of 60 mm to obtain screened blue algae powder; mixing the screened blue algae powder with purified water, and performing stirring to obtain a mixture; transferring the mixture to an autoclave filled with polytetrafluoroethylene, performing heating at 120-180 DEG C for 8-12 h, and cooling a reactant to room temperature after heating, and collecting the reactant; filtering the reactantwith a microporous membrane with pore diameter of 0.22 mu m, performing dialysis with a dialysis bag for 30-36 h, and finally treating the product with a vacuum freeze-drying method to obtain the solid blue algae source carbon dots. The preparation method has simple operation and high production efficiency, and the prepared carbon dots can be applied to cell labeling, biological imaging, fluorescent probes and the like.

Description

technical field [0001] The invention relates to the technical field of nanomaterial preparation. Background technique [0002] Carbon quantum dots are a new type of nanomaterial with carbon as the skeleton structure. Quantum dots have broad applications in electrochemical immunosensing and biomedical imaging. [0003] In recent years, extensive research work has focused on the synthesis of carbon quantum dots with different emission properties and synergistic effects. The specific methods include arc discharge treatment, electrochemical exfoliation, laser ablation and chemical oxidation, etc., but these methods exist However, problems such as high cost of raw materials, complex processes, harsh synthesis conditions, or high energy dependence are not conducive to the practical application in production and life, and severely limit the large-scale production of carbon quantum dots. Contents of the invention [0004] The object of the present invention is to provide a metho...

Claims

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Application Information

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IPC IPC(8): C09K11/65C01B32/15B82Y20/00B82Y40/00
CPCB82Y20/00B82Y40/00C01P2002/01C01P2002/82C09K11/65C01B32/15
Inventor 黄洁仪戴培灿梁瑞锋陆水妹李栋宇张婷婷
Owner LINGNAN NORMAL UNIV
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