Method for synthesizing nitrogen doped carbon quantum dot based on one-step monocomponent hydro-thermal synthesis

A technology of hydrothermal synthesis and carbon quantum dots, applied in chemical instruments and methods, nano-carbon, luminescent materials, etc., to achieve the effect of simple steps, cheap price and easy operation

Active Publication Date: 2014-01-08
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But these methods all need to provide carbon source and nitrogen source at the same time

Method used

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  • Method for synthesizing nitrogen doped carbon quantum dot based on one-step monocomponent hydro-thermal synthesis
  • Method for synthesizing nitrogen doped carbon quantum dot based on one-step monocomponent hydro-thermal synthesis
  • Method for synthesizing nitrogen doped carbon quantum dot based on one-step monocomponent hydro-thermal synthesis

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Embodiment 1

[0020] Step 1, 5g of ammonium citrate is dissolved in 25mL of water, and the ammonium citrate is completely dissolved to form a homogeneous solution;

[0021] Step 2, put the reaction liquid into a 50mL hydrothermal reaction kettle, keep it warm at 160°C for 6 hours, and then cool to room temperature;

[0022] Step 3: Rotate evaporate the reacted solution to a small amount of liquid, then transfer to a silica gel chromatographic column for elution to obtain bright blue nitrogen-doped carbon quantum dots.

Embodiment 2

[0024] Step 1, dissolve 2g of ammonium citrate in 25mL of water, the ammonium citrate is completely dissolved to form a homogeneous solution;

[0025] Step 2, put the reaction liquid into a 50mL hydrothermal reaction kettle, keep it warm at 160°C for 6 hours, and then cool to room temperature;

[0026] Step 3: Rotate evaporate the reacted solution to a small amount of liquid, then transfer to a silica gel chromatographic column for elution to obtain bright blue nitrogen-doped carbon quantum dots.

Embodiment 3

[0028] Step 1, dissolve 2g of ammonium citrate in 25mL of water, the ammonium citrate is completely dissolved to form a homogeneous solution;

[0029] Step 2, put the reaction liquid into a 50mL hydrothermal reaction kettle, keep it warm at 200°C for 11 hours, and then cool to room temperature;

[0030] Step 3: Rotate evaporate the reacted solution to a small amount of liquid, then transfer to a silica gel chromatographic column for elution to obtain bright blue nitrogen-doped carbon quantum dots.

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Abstract

The invention discloses a method for synthesizing nitrogen doped carbon quantum dots based on one-step monocomponent hydro-thermal synthesis, which comprises the following steps: mixing and dissolving ammonium citrate with water, putting the mixture in a sealed reaction vessel, performing heat preservation at 140-220 DEG C for 4-48 hours, after the reaction, naturally cooling to room temperature, and separating the product by a silica gel chromatographic column to obtain the nitrogen doped carbon quantum dots. Compared with existing methods, the method of the invention adopts a single and cheap raw material, is simple in steps, easy to operate, and suitable for mass production.

Description

technical field [0001] The invention relates to a preparation method of nanometer materials, in particular to a method for hydrothermally synthesizing nitrogen-doped carbon quantum dots. Background technique [0002] In 2004, XiaoyouXu and others obtained fluorescent carbon quantum dots for the first time in the product of multi-walled carbon nanotubes synthesized by the purified arc discharge method (J.Am.Chem.Soc.2004, 126, 12736-12737.), which This discovery started an upsurge in research on carbon quantum dots. [0003] Because the scale of carbon quantum dots is between 1 and 10nm, it has quantum confinement effect and boundary effect, which can make it emit fluorescence of various colors. In addition, carbon quantum dots have the advantages of good water solubility, high quantum efficiency, strong fluorescence intensity, easy surface modification, and low biological toxicity, so they can be widely used in cell / tissue labeling, drug carriers, solar cells, and photocata...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/65C01B31/02C01B32/15
Inventor 杨志徐明瀚刘芸苏言杰张亚非
Owner SHANGHAI JIAO TONG UNIV
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