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Preparation method of silver sulfide quantum dot-indium silver sulfide quantum dot nanomaterial and product thereof

A nanomaterial and quantum dot technology, applied in the field of nanomaterials, can solve the problems of inability to large-scale production and use, increase the difficulty of experiments, increase complexity and variability, and achieve safe and controllable synthesis methods, high synthesis efficiency, and time. short effect

Inactive Publication Date: 2020-05-01
SHANGHAI UNIVERSITY OF ELECTRIC POWER
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] Chinese patent CN102849779A discloses a preparation method of silver sulfide quantum dots, which mixes silver acetate, long-chain carboxylic acid and short-chain mercaptol at a molar ratio of 1:0 to 5:5, and then adds a non-coordinating organic solvent However, the addition of organic solvents increases the difficulty of the experiment, and the use of tetradecene, hexadecene or octadecene makes it impossible to use in large-scale production
Chinese patent CN109021970A discloses a kind of AgInS 2 or CuInS 2 A method for preparing ultra-small quantum dots, which obtains ultra-small AgInS coated with small molecule thiol groups by adding a small molecule thiol group encapsulating agent 2 and CuInS 2 Quantum dot aqueous solution, and the addition of small molecule amino ligands increases the complexity and variability in the synthesis method, resulting in an increase in the difficulty of testing

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  • Preparation method of silver sulfide quantum dot-indium silver sulfide quantum dot nanomaterial and product thereof
  • Preparation method of silver sulfide quantum dot-indium silver sulfide quantum dot nanomaterial and product thereof
  • Preparation method of silver sulfide quantum dot-indium silver sulfide quantum dot nanomaterial and product thereof

Examples

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Embodiment 1

[0038] This embodiment provides a synthetic Ag 2 S to AgInS 2 The preparation method of quantum dot nanomaterials, the specific preparation steps are as follows:

[0039] Step 1: Add 1 mmol silver nitrate (AgNO 3 ) with 4mmol indium nitrate tetrahydrate (In(NO 3 ) 3 4H 2 O) adding to 50ml deionized water and stirring evenly to obtain a metal precursor solution;

[0040] Step 2: 2 mmol L-cysteine ​​(C 3 h 7 NO 2 S) Add to the precursor solution obtained in step 1, stir evenly with magnetic force, transfer to a three-neck round bottom flask for hydrothermal reaction, set the hydrothermal reaction temperature to 100°C, take an appropriate amount of reaction solution every 1 hour, and wait for the reaction After 3 hours, samples were taken for testing and characterization, and the precipitate was centrifuged (12000r / min for 1 minute), washed (2-3 times with ethanol), and dried (dried for 2-3 days at room temperature), that is Available Ag 2 S quantum dot;

[0041] Step ...

Embodiment 2

[0045] This example provides a method for synthesizing Ag2S to AgInS 2 The preparation method of quantum dot nanomaterials, the specific preparation steps are as follows:

[0046] Step 1: Add 1 mmol silver nitrate (AgNO 3 ) with 4mmol indium nitrate tetrahydrate (In(NO 3 ) 3 4H 2 O) adding to 50ml deionized water and stirring evenly to obtain a metal precursor solution;

[0047] Step 2: 2 mmol L-cysteine ​​(C 3 h 7 NO 2 S) Add to the precursor solution obtained in step 1, stir evenly with magnetic force, transfer to a three-neck round bottom flask for hydrothermal reaction, set the hydrothermal reaction temperature to 90°C, take an appropriate amount of reaction solution every 1 hour, and wait for the reaction At 4 hours, samples were taken for testing and characterization, and the precipitate was centrifuged (centrifuged at 12000r / min for 1 minute), washed (washed 2-3 times with ethanol), and dried (dried at room temperature for 2-3 days), that is Ag2S quantum dots ar...

Embodiment 3

[0050] (1) The present embodiment provides a kind of synthetic Ag 2 S to AgInS 2 The preparation method of quantum dot nanomaterials, the specific preparation steps are as follows:

[0051] Step 1: Add 1 mmol silver nitrate (AgNO 3 ) with 4mmol indium nitrate tetrahydrate (In(NO 3 ) 3 4H 2 O) adding to 50ml deionized water and stirring evenly to obtain a metal precursor solution;

[0052] Step 2: 2 mmol L-cysteine ​​(C 3 h 7 NO 2 S) Add to the precursor solution obtained in step 1, stir evenly with magnetic force, transfer to a three-neck round bottom flask for hydrothermal reaction, set the hydrothermal reaction temperature to 80°C, take an appropriate amount of reaction solution every 1 hour, and wait for the reaction At 4 hours, samples were taken for testing and characterization, and the precipitate was centrifuged (centrifuged at 12000r / min for 1 minute), washed (washed 2-3 times with ethanol), and dried (dried at room temperature for 2-3 days), that is Available...

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Abstract

The invention discloses a preparation method of a silver sulfide quantum dot-indium silver sulfide quantum dot nanomaterial. The preparation method is characterized by comprising the following steps:adding silver nitrate and indium nitrate tetrahydrate into deionized water, and carrying out uniform mixing under stirring to obtain a metal precursor solution; and adding L-cysteine into the metal precursor solution, carrying out uniform mixing under stirring, carrying out a hydrothermal reaction, centrifuging a precipitate, and conducting washing and drying to obtain the silver sulfide quantum dot-indium silver sulfide quantum dot nanomaterial. According to the method, an Ag2S quantum dot and an AgInS2 quantum dot are synthesized in one step through a hydrothermal method, conversion of silver sulfide and indium silver sulfide can be rapidly achieved, and the water-soluble quantum dots are prepared; the preparation method is simple, time is short, and technological conditions are simple;and the preparation method is safe, controllable, environmentally friendly and high in synthesis efficiency.

Description

technical field [0001] The invention belongs to the technical field of nanomaterials, and in particular relates to a preparation method of silver sulfide quantum dots and indium silver sulfide quantum dot nanomaterials and products thereof. Background technique [0002] Quantum dots are low-dimensional semiconductor nanocrystals, usually less than 10 nanometers in size. Quantum dots have been widely used in cell labeling, immunoassay, quantum dot television and other fields due to their advantages of long fluorescence lifetime, good biocompatibility and good photostability. At present, the research on quantum dots mainly focuses on binary quantum dots of groups IIB-VIA (such as CdS, HgSe, etc.) and groups VA-VIA (such as PbS, PbSe, etc.). Since binary quantum dots contain carcinogenic heavy metals such as Cd, Pb, and Hg, the risk of experimental research is increased, and the research and practical application of quantum dots are greatly limited. The ternary quantum dots a...

Claims

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Application Information

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IPC IPC(8): C01G5/00C01G15/00C09K11/58C09K11/62B82Y20/00B82Y30/00
CPCC01G5/00C01G15/006C09K11/582C09K11/621B82Y20/00B82Y30/00
Inventor 袁斌霞蔡晓东方欣怡王道累朱瑞刘建峰吴懋亮朱群志
Owner SHANGHAI UNIVERSITY OF ELECTRIC POWER