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Synthesis and application of copper, indium and sulfur three-element quantum dot 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: 2019-08-13
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 and sulfur three-element quantum dot with thioglycerol as ligand
  • Synthesis and application of copper, indium and sulfur three-element quantum dot with thioglycerol as ligand
  • Synthesis and application of copper, indium and sulfur three-element quantum dot 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 the protection of nitrogen. 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 clarifie...

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 stirring for 13min, add thiourea rapidly, continue stirring for 45min, and 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 synthesis and application of a copper, indium and sulfur three-element quantum dot with thioglycerol as ligand. Thioglycerol is dissolved in distilled water, CuCl2 2H2O and InCl3 4h2O are added, the pH value of the solution is adjusted under the nitrogen protection, and thiourea is rapidly added to be stirred to obtain reaction liquid; reaction is conducted at a certain temperature, and natural cooling is conducted until the room temperature is reached to obtain clear liquid; absolute ethyl alcohol is added to the clear liquid, precipitates are generated, high-speed centrifuging is conducted, supernate is removed, and vacuum-drying and grinding are conducted to prepare the copper, indium and sulfur three-element quantum dot with thioglycerol as the ligand. The three-element quantum dot is applied to solar cells and biological optical imaging materials. A synthesis method is short in synthesis time and environmentally friendly; an applied water phase synthesis method uses low-price raw materials, is low in toxin and environmentally friendly and can be directly applied to a biological system.

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 Applications(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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