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Preparation method for water-soluble copper sulphide quantum dots

A copper sulfide, quantum dot technology, applied in copper sulfide, chemical instruments and methods, nanotechnology for materials and surface science, etc., can solve the problems of quantum dot instability, limited application, easy agglomeration, etc. Simple and controllable, inhibiting the activity of cancer cells, and the effect of mild reaction conditions

Inactive Publication Date: 2015-10-28
HENAN NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, the methods for synthesizing copper sulfide quantum dots mainly include: electrochemical method, thermal injection method, ion exchange method and hydrothermal method, etc. Most of these synthesis methods require high temperature and complex devices, and the operation steps are cumbersome and applied to biology. need to be transformed into water-soluble quantum dots
At present, there are few methods for synthesizing water-soluble copper sulfide quantum dots. The reasons are: (1) the synthesized quantum dots are unstable and easy to agglomerate without surfactant; (2) the crystallinity is not good, which limits its (3) The yield is low, it is difficult to apply in industrial production

Method used

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  • Preparation method for water-soluble copper sulphide quantum dots
  • Preparation method for water-soluble copper sulphide quantum dots
  • Preparation method for water-soluble copper sulphide quantum dots

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] (1) Add 1.550g copper chloride to 150mL absolute ethanol, stir until completely dissolved, add 1.602g thioacetamide to 200mL absolute ethanol, stir until completely dissolved, slowly add copper chloride solution to thioethyl In the amide solution, ultrasonication for 10 minutes forms the precursor;

[0013] (2) Take 300mL of pre-refrigerated precursor, add 300mL of pre-refrigerated high-purity water under stirring conditions, react the mixture of the two at 4°C for 24h, centrifuge at a centrifugal rate of 13000r / min after the reaction, and centrifuge the obtained product Alternately washing with absolute ethanol and high-purity water three times, and drying to obtain water-soluble copper sulfide quantum dots.

[0014] figure 1 a is the XRD spectrum of the product, as can be seen from the figure, there is no obvious peak, indicating that the product obtained under this condition is an amorphous copper sulfide quantum dot, figure 2 a is the transmission electron micros...

Embodiment 2

[0016] (1) Add 1.550g copper chloride to 150mL absolute ethanol, stir until completely dissolved, add 1.602g thioacetamide to 200mL absolute ethanol, stir until completely dissolved, slowly add copper chloride solution to thioethyl In the amide solution, ultrasonication for 10 minutes forms the precursor;

[0017] (2) Take 300mL of precursor, add 300mL of high-purity water under stirring conditions, react the mixture of the two at 40°C for 0.5h, centrifuge at a centrifugal rate of 13000r / min after the reaction, and centrifuge the obtained product with absolute ethanol and High-purity water was alternately washed three times, and water-soluble copper sulfide quantum dots were obtained after drying.

[0018] figure 1 b is the XRD spectrum of the product, which is completely consistent with the standard spectrum (JCPDS NO.65-3928) of the hexagonal CuS crystal of indigosite, and its lattice parameters a=0.3768nm, c=1.6270nm, compared with the standard spectrum , the diffraction ...

Embodiment 3

[0020] (1) Add 1.550g copper chloride to 150mL absolute ethanol, stir until completely dissolved, add 1.602g thioacetamide to 200mL absolute ethanol, stir until completely dissolved, slowly add copper chloride solution to thioethyl In the amide solution, stir for 10 minutes to form a precursor;

[0021] (2) Take 300mL of the precursor, add 300mL of high-purity water under stirring conditions, and react the mixture of the two at 80°C for 0.5h. High-purity water was alternately washed three times, and water-soluble copper sulfide quantum dots were obtained after drying.

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Abstract

The invention discloses a preparation method for water-soluble copper sulphide quantum dots. The preparation method for the water-soluble copper sulphide quantum dots comprises the following steps that copper salt and a sulfur compound are dissolved into organic solvents separately to serve as a copper source and a sulfur source, and the copper source and the sulfur source are mixed under the ultrasound or stirring condition to react to form a precursor; high purity water or an aqueous solution containing a surfactant or an aqueous solution containing protein is added into the formed precursor, and then the mixture is reacted at the temperature of 4-80 DEG C for 0.5-24 h to obtain the water-soluble copper sulphide quantum dots. The preparation method for the water-soluble copper sulphide quantum dots has the advantages that the preparation method is simple and controllable, the reaction conditions are mild, the materials are low in price and easy to obtain, the environmentally-friendly effect is achieved, and the obtained water-soluble copper sulphide quantum dots achieves good fluorescence property.

Description

technical field [0001] The invention belongs to the technical field of synthesis of inorganic functional material copper sulfide, and in particular relates to a preparation method of water-soluble copper sulfide quantum dots. Background technique [0002] Quantum dots, also known as nanocrystals, generally have a particle size between 1-10nm. Since electrons and holes are quantum-confined, the continuous energy band structure becomes a discrete energy-level structure with molecular characteristics. Can emit fluorescence. Due to the quantum size effect, surface effect, and macroscopic quantum tunneling effect, quantum dots have incomparable photoelectric properties of bulk materials and have become a research hotspot. Based on quantum effects, quantum dots have broad application prospects in the fields of solar cells, light-emitting devices, and optical biomarkers. Copper sulfide is an important transition metal sulfide, and copper sulfide quantum dots have been extensively...

Claims

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Application Information

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IPC IPC(8): C01G3/12C09K11/58B82Y30/00
Inventor 王晓兵双微杨林梁慧君王歌刘福园王魁郭玉明朱琳
Owner HENAN NORMAL UNIV
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