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Synthesis and application of copper indium sulfur ternary quantum dots with thioglycerol as ligand

A technology of ternary quantum dots and thioglycerol, applied in the field of biochemistry, can solve the problems of heavy metal toxicity and limited application, and achieve the effects of short synthesis time, reduced toxicity and cheap raw materials

Active Publication Date: 2022-02-15
NORTHWEST NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, quantum dots containing Cd have been widely reported, but the inherent toxicity of heavy metals severely limits its application.

Method used

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  • Synthesis and application of copper indium sulfur ternary quantum dots with thioglycerol as ligand
  • Synthesis and application of copper indium sulfur ternary quantum dots with thioglycerol as ligand
  • Synthesis and application of copper indium sulfur ternary quantum dots with thioglycerol as ligand

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Dissolve 3.60 mmol thioglycerol in a three-necked flask filled with 10.5 mL distilled water, and add CuCl 2 2H 2 O (0.15 mmol) and (0.15 mmol) were added to the mixed solution, and the solution immediately turned light green under nitrogen protection. While stirring, NaOH solution (4mol / L) was added dropwise into the mixed solution with a syringe until the pH value of the mixed solution was adjusted to 10.5, during which the color of the mixed solution changed from light blue to orange-yellow clear liquid. After stirring for 10 min, CS(NH 2 ) 2 (0.30 mmol), and continued to stir for 40 min to obtain a reaction solution; the reaction solution was transferred to a stainless steel reaction kettle with a polytetrafluoroethylene liner with a volume of 15 mL. The reaction kettle was placed in an oven at 150°C for 21 h, taken out, and naturally cooled to room temperature to obtain a total of about 15 ml of clear liquid. Add 150 ml of absolute ethanol to the clarified solut...

Embodiment 2

[0030] According to the molar ratio of 1:5:20:40, take CuCl respectively 2 2H 2 O, InCl 3 4H 2 O, thiourea and thioglycerol; dissolve 3.6 mmol thioglycerol in 10.5 mL of distilled water, dissolve thioglycerol in distilled water, add CuCl 2 2H 2 O and InCl 3 4H 2 0, to obtain a mixed solution; under the protection of nitrogen, while stirring, drip the NaOH solution whose molar volume concentration is 4mol / L until the pH value of the mixed solution is 11.0, continue stirring for 15 min, add thiourea rapidly, continue stirring for 50 min, The reaction solution was obtained; the reaction solution was placed in an environment with a temperature of 160°C for 23 h, taken out, and naturally cooled to room temperature to obtain a clear solution; according to the volume ratio of 1:11, the clear solution and absolute ethanol were respectively taken, and the absolute ethanol was added to In the clarified liquid, precipitates were produced, centrifuged three times at high speed, and ...

Embodiment 3

[0032] According to the molar ratio of 1:3:12:25, take CuCl respectively 2 2H 2 O, InCl 3 4H 2 O, thiourea and thioglycerol; dissolve 3.6 mmol thioglycerol in 10.5 mL of distilled water, dissolve thioglycerol in distilled water, add CuCl 2 2H 2 O and InCl 3 4H 2 0, to obtain a mixed solution; under nitrogen protection, while stirring, drip the NaOH solution with a molar volume concentration of 4mol / L until the pH value of the mixed solution is 10.7, continue to stir for 13min, add thiourea quickly, and continue to stir for 45min to obtain a reaction solution; the reaction solution was placed in an environment with a temperature of 155°C for 22 h, taken out, and naturally cooled to room temperature to obtain a clear solution; according to the volume ratio of 1:10.5, the clear solution and absolute ethanol were respectively taken, and absolute ethanol was added to the clear solution In the process, a precipitate was produced, centrifuged at high speed three times, and the ...

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Abstract

The invention discloses the synthesis and application of a copper indium sulfur ternary quantum dot with thioglycerol as a ligand. The thioglycerol is dissolved in distilled water, and CuCl is added 2 2H 2 O and InCl 3 4H 2 O, under the protection of nitrogen, adjust the pH value of the solution, quickly add thiourea, stir to obtain a reaction solution; react at a certain temperature, naturally cool to room temperature, and obtain a clear solution; add absolute ethanol to the clear solution to produce precipitation, and centrifuge at a high speed , discarding the supernatant, vacuum drying, and grinding to prepare copper indium sulfur ternary quantum dots with thioglycerol as a ligand. The ternary quantum dots are used in solar cells and bio-optical imaging materials. The synthesis method has short synthesis time and is green and environment-friendly, and the raw materials of the aqueous phase synthesis method used are cheap, low-toxic and environment-friendly, and can be directly applied to biological systems.

Description

technical field [0001] The invention belongs to the technical field of biochemistry, and relates to a method for preparing copper indium sulfur ternary quantum dots with thioglycerol as a ligand; the invention also relates to an application of the copper indium sulfur ternary quantum dots prepared by the preparation method . Background technique [0002] Quantum dots (Quantum dots, QDs), also known as semiconductor nanocrystals, are approximately spherical in shape, with a three-dimensional size in the range of 2-10nm, and have obvious quantum effects. Quantum dots are generally composed of semiconductor materials such as II-VI group elements (such as CdS, CdSe, CdTe, ZnSe, etc.) or III-V group elements (cadmium-free quantum dots, such as InP, InAs, etc.), or two or two The above semiconductor materials form a core / shell structure (such as common CdSe / ZnS core / shell structure quantum dots, etc.). Quantum dots (QDs) are the state of matter between the macroscopic bulk phase...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K11/02C09K11/62H01L51/42B82Y20/00B82Y30/00
CPCC09K11/025C09K11/621B82Y20/00B82Y30/00H10K30/15Y02E10/549
Inventor 关晓琳李志飞杨学琴王凯龙王林刘美娜来守军
Owner NORTHWEST NORMAL UNIVERSITY
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