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Preparation method for three-element copper-iron-sulfur (CuFeS2) fluorescent quantum dot with magnetic property by aqueous-phase synthesis

A technology of fluorescent quantum dots and ternary copper, applied in chemical instruments and methods, iron sulfide, nano optics, etc., can solve the problems of limited application, poor dispersion, large size of quantum dots, etc., and achieve low raw material cost and good dispersion , The effect of simple production equipment

Inactive Publication Date: 2015-12-16
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But the synthesized CuFeS 2 Quantum dots are large in size and poorly dispersed in water, which limits their further applications

Method used

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  • Preparation method for three-element copper-iron-sulfur (CuFeS2) fluorescent quantum dot with magnetic property by aqueous-phase synthesis
  • Preparation method for three-element copper-iron-sulfur (CuFeS2) fluorescent quantum dot with magnetic property by aqueous-phase synthesis
  • Preparation method for three-element copper-iron-sulfur (CuFeS2) fluorescent quantum dot with magnetic property by aqueous-phase synthesis

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] 0.0301g of thioacetamide (TAA) was dissolved in 20mL of diethylene glycol (DEG) to prepare an anion solution. 0.0966g of copper nitrate and 0.1616g of ferric nitrate were dissolved in 20mLDEG to prepare a cationic solution for later use. Add 20 mL of the cation solution above into a 100 mL three-necked flask, and raise the temperature of the oil bath to 160° C. to reflux. The anionic solution was quickly injected into the above solution and refluxed for 60 minutes. After the reaction, the solution was cooled to room temperature. Acetone was added to the obtained product until precipitation occurred, and then centrifuged in a centrifuge at 6000 rpm for 8 minutes. The centrifuged precipitate was redispersed in acetone and then centrifuged at the same speed to obtain the precipitate, and the product after washing three times was dried at room temperature to obtain CuFeS 2 Fluorescent quantum dots.

[0030] figure 1 CuFeS 2 The emission spectrum of quantum dots shows...

Embodiment 2

[0032]0.0301g of thioacetamide (TAA) was dissolved in 20mL of ethylene glycol (EG) to prepare an anion solution. 0.0966g of copper nitrate and 0.1616g of ferric nitrate were dissolved in 20mLEG to prepare a cationic solution for future use. Add 20 mL of the cation solution above into a 100 mL three-necked flask, and raise the temperature of the oil bath to 120° C. to reflux. The anionic solution was quickly injected into the above solution and refluxed for 45 minutes. After the reaction, the solution was cooled to room temperature. Acetone was added to the obtained product until precipitation occurred, and then centrifuged in a centrifuge at 6000 rpm for 8 minutes. The centrifuged precipitate was redispersed in acetone and then centrifuged at the same speed to obtain the precipitate, and the product after washing three times was dried at room temperature to obtain CuFeS 2 quantum dots.

[0033] Figure 5 CuFeS 2 The emission spectrum of quantum dots shows that CuFeS 2 Q...

Embodiment 3

[0035] 0.0301g of thioacetamide (TAA) was dissolved in 20mL of water to prepare an anion solution. 0.0483g of copper nitrate and 0.2424g of ferric nitrate were dissolved in 20mL of water to prepare a cationic solution for later use. Add 20 mL of the cation solution above into a 100 mL three-necked flask, and raise the temperature of the oil bath to 90° C. to reflux. The anionic solution was quickly injected into the above solution and refluxed for 75 minutes. After the reaction, the solution was cooled to room temperature. Acetone was added to the obtained product until precipitation occurred, and then centrifuged in a centrifuge at 6000 rpm for 8 minutes. The centrifuged precipitate was redispersed in acetone and then centrifuged at the same speed to obtain the precipitate, and the product after washing three times was dried at room temperature to obtain CuFeS 2 quantum dots.

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Abstract

The invention relates to a preparation method for a three-element copper-iron-sulfur (CuFeS2) fluorescent quantum dot with magnetic property by aqueous-phase synthesis. The method comprises the following steps: dissolving a sulfur-contained compound in a waterborne solvent, and carrying out stirring at room temperature so as to obtain a sulfur-contained compound solution; dissolving a copper-contained compound and an iron-contained compound in the waterborne solvent, and carrying out stirring at room temperature so as to obtain a cationic solution; injecting the sulfur-contained compound solution into the cationic solution at 90 to 180 DEG C, and carrying out reflux stirring so as to obtain reaction liquid containing CuFeS2 fluorescent quantum dots; adding acetone, and carrying out separation so as to obtain precipitate; and carrying out centrifugation again, and carrying washing so as to obtain the three-element CuFeS2 fluorescent quantum dot. The CuFeS2 fluorescent quantum dot prepared by using the method in the invention has small size, good dispersibility, narrow particle size distribution, good luminescent property, and magnetic property. The method provided by the invention has simple process, requires simple production equipment and facilitates to batch production.

Description

technical field [0001] The invention belongs to the field of preparation of quantum dots, in particular to a preparation method for aqueous phase synthesis of magnetic ternary copper-iron-sulfur CuFeS2 fluorescent quantum dots. Background technique [0002] Fluorescent semiconductor quantum dots are an important material with a series of outstanding advantages, such as high quantum efficiency, bright luminescence, high chemical stability, and size-tunable emission spectrum, etc., which are suitable for application in the field of biomarkers. In the application of bioluminescent labeling, compared with traditional organic fluorescent dyes, noble metal nanoparticles and rare earth luminescent materials, quantum dots have the following advantages: they have a relatively wide excitation wavelength range and a relatively narrow emission wavelength range, and it is possible to use a A kind of excitation light simultaneously excites multiple quantum dots and emits fluorescence of d...

Claims

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Application Information

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IPC IPC(8): C09K11/02C09K11/60C01G49/12B82Y20/00B82Y40/00
Inventor 王宏志车东晨张青红李耀刚
Owner DONGHUA UNIV
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