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Preparation method of green environment-friendly water-soluble Ag-IN-S/ZNS quantum dot material

A quantum dot material, a green and environmentally friendly technology, applied in the direction of nanotechnology, luminescent materials, chemical instruments and methods for materials and surface science, to achieve excellent physical and chemical properties, stable size, uniform and stable preparation products

Inactive Publication Date: 2018-04-06
NANCHANG HANGKONG UNIVERSITY
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Problems solved by technology

[0002] The controllable preparation of nanoluminescent materials in the visible light band is widely used in display lighting, bioluminescence labeling, etc. The development of cadmium-based nanomaterials has been quite mature, but considering the potential toxicity and regulatory restrictions, the successful development of no Cadmium emitting nanocrystals are a challenge, in particular, heterostructures with desirable properties

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  • Preparation method of green environment-friendly water-soluble Ag-IN-S/ZNS quantum dot material
  • Preparation method of green environment-friendly water-soluble Ag-IN-S/ZNS quantum dot material

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preparation example Construction

[0021] A green and environment-friendly preparation method of water-soluble Ag-In-S / ZnS quantum dot material, comprising:

[0022] (1) Get an aqueous solution of a certain amount of silver ionic compounds, a certain amount of thioglycolic acid aqueous solution, a certain amount of ammonia and deionized water in a reactor, magnetically stir and maintain an inert gas environment.

[0023] (2) Add a certain amount of ammonia solution, indium ionic compound solution and nitric acid solution to make the turbid solution clear.

[0024] (3) Add a certain amount of sulfide ion compound to (2), stir and heat to a certain temperature in a water bath, and keep warm for a certain period of time.

[0025] (4) Rotate (3) and add a certain amount of thioglycolic acid aqueous solution again to prevent the agglomeration of colloidal quantum dots.

[0026] (5) The solution was evaporated at 40°C to a final volume of about 10 mL, and then used for size-selective precipitation.

[0027] (6) AIS...

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Abstract

The invention provides a preparation method of a green environment-friendly water-soluble Ag-IN-S / ZNS quantum dot material. According to the water-soluble light-emitting Ag-IN-S / ZNS quantum dot material, a precipitation method is adopted to prepare core-shell type quantum dots. AIS (AIS / Zn quantum dot luminescence) with a fraction up to 10-11 is selected, and the color range of visible light waveband which can be covered is from deep red to blue green, wherein the photoluminescence (Pl) quantum yield can reach 80%. The material is free of toxic heavy metals such as cadmium and the like, is green and environmentally friendly, and can be widely applicable to the aspects of biological fluorescence labeling, display illumination and the like.

Description

technical field [0001] The invention relates to the technical field of nanometer functional materials, in particular to a method for preparing a green and environment-friendly water-soluble Ag-In-S / ZnS quantum dot material. Background technique [0002] The controllable preparation of nanoluminescent materials in the visible light band is widely used in display lighting, bioluminescence labeling, etc. The development of cadmium-based nanomaterials has been quite mature, but considering the potential toxicity and regulatory restrictions, the successful development of no Cadmium-emitting nanocrystals are a challenge, in particular, heterostructures with desirable properties. The invention successfully synthesizes green and environment-friendly water-soluble Ag-In-S / ZnS quantum dot materials, regulates the ratio of Ag, In, and S to regulate the size of the nucleus, and makes the fluorescence tunable between ∼480 and 735 nm by wrapping the shell thickness between. Aqueous phas...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/62C09K11/02B82Y20/00B82Y30/00B82Y40/00
CPCB82Y20/00B82Y30/00B82Y40/00C09K11/02C09K11/623
Inventor 张余宝张虚谷纪丽珊徐阅斌韦忠山
Owner NANCHANG HANGKONG UNIVERSITY
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