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Preparation method for water-soluble zinc sulfide quantum dots

A technology of zinc sulfide and quantum dots, which is applied in the direction of zinc sulfide, chemical instruments and methods, nanotechnology, etc., can solve the problems of difficult particle size control, cumbersome operation steps, and high equipment requirements, and achieve environmental friendliness, cheap and easy-to-get raw materials, and strong Effect of Fluorescent Properties

Inactive Publication Date: 2017-09-15
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 zinc sulfide quantum dots mainly include: hydrothermal method, gas phase method, electrochemical method, hot injection method, ion exchange method and evaporation condensation method, etc. Most of these synthesis methods require high temperature and complicated devices, and the operation steps It is cumbersome and needs to be converted into water-soluble quantum dots when applied to biology
At present, there are few methods for synthesizing water-soluble zinc sulfide quantum dots. The reasons are: (1) high technical equipment requirements; (2) easy to introduce impurities and impure products; (3) difficult to control particle size

Method used

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  • Preparation method for water-soluble zinc sulfide quantum dots
  • Preparation method for water-soluble zinc sulfide quantum dots
  • Preparation method for water-soluble zinc sulfide quantum dots

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Embodiment 1

[0016] 1.4874g of zinc nitrate was dissolved in 200mL of bovine serum albumin solution with a mass concentration of 5g / L to obtain a chelating solution of zinc ions; 4.0g of thioacetamide was dissolved in 100mL of acetic acid solution to obtain a sulfur source solution; The chelating solution and the sulfur source solution were quickly sealed in two different containers in the same closed reaction system at a volume ratio of 1:2, and then the closed reaction system was reacted at 4°C for 72h. After the reaction, it was placed in a centrifuge at 1300r Centrifugation at a centrifugal rate of / min, the centrifuged product was alternately washed three times with absolute ethanol and high-purity water, and dried to obtain water-soluble zinc sulfide quantum dots.

[0017] figure 1 It is the X-ray diffraction spectrum of the water-soluble zinc sulfide quantum dots that the present embodiment makes, as can be seen from the figure, there is no obvious peak, indicating that the product ...

Embodiment 2

[0019] 1.4874g zinc nitrate is dissolved in the bovine serum albumin solution that 200mL mass concentration is 0.1g / L to obtain the chelation solution of zinc ion; 4.0g thioacetamide is dissolved in 100mL sulfuric acid solution to obtain sulfur source solution; Zinc The chelating solution of ions and the sulfur source solution were quickly sealed in two different containers in the same closed reaction system at a volume ratio of 1:1, and then the closed reaction system was reacted at 8°C for 72 hours, and placed in a centrifuge after the reaction was completed. Centrifuge at a centrifugal rate of 1300r / min, and the centrifuged product is alternately washed three times with absolute ethanol and high-purity water, and dried to obtain water-soluble zinc sulfide quantum dots.

Embodiment 3

[0021] 1.4874g zinc nitrate is dissolved in the bovine serum albumin solution that 200mL mass concentration is 10g / L to obtain the chelation solution of zinc ion; 4.0g thioacetamide is dissolved in the 100mL nitric acid solution to obtain sulfur source solution; Zinc ion The chelating solution and the sulfur source solution were quickly sealed in two different containers in the same closed reaction system at a volume ratio of 1:4, and then the closed reaction system was reacted at 4°C for 72h. After the reaction, it was placed in a centrifuge at 1300r Centrifugation at a centrifugal rate of / min, the centrifuged product was alternately washed three times with absolute ethanol and high-purity water, and dried to obtain water-soluble zinc sulfide quantum dots.

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Abstract

The invention discloses a preparation method for water-soluble zinc sulfide quantum dots. The concrete steps comprise dissolving a zinc salt into a solution containing a macromolecular matrix to obtain a chelating solution of zinc ion; dissolving a sulfur-containing compound in an acidic solution to obtain a sulfur-source solution; sealing the zinc ion chelating solution and the sulfur-source solution in two different containers a same sealed reaction system, then performing reaction at 0-10 DEG C for 24-96 h in the sealed reaction system, after the reaction is finished, performing centrifugal separation in a centrifuge, washing the centrifugation product for three times alternately by ethanol and high-purity water, and performing drying to obtain the water-soluble zinc sulfide quantum dots. The preparation method is simple and controllable, mild in reaction conditions, and friendly to environment, the raw materials are cheap and easy to obtain, and the obtained product has very high fluorescence property and very good biocompatibility.

Description

technical field [0001] The invention belongs to the technical field of synthesis of inorganic functional material zinc sulfide, and in particular relates to a preparation method of water-soluble zinc 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 hot research topic at present. Based on quantum effects, quantum dots have broad application prospects in the fields of solar cells, light-emitting devices, and optical biomarkers. As an important transition metal sulfide, zinc sulfide quantum dots have been widely studied. For exam...

Claims

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Application Information

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IPC IPC(8): C01G9/08B82Y40/00C09K11/56
CPCB82Y40/00C01G9/08C01P2002/72C01P2004/04C01P2004/64C01P2006/40C09K11/565
Inventor 杨林刘静王歌王晓兵
Owner HENAN NORMAL UNIV
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