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Rapid preparation method of cadmium telluride quantum dot

A cadmium telluride quantum dot, fast technology, applied in binary selenium/tellurium compounds, nanotechnology for materials and surface science, nanotechnology, etc., can solve the high toxicity of hydrazine hydrate, environmental pollution, and improve the quantum dot industry Production costs and other issues, to achieve the effects of easy implementation, high quantum yield, and simple preparation steps

Inactive Publication Date: 2013-04-03
HUNAN UNIV OF SCI & TECH
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  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method first reduces tellurite with sodium borohydride, and then adds a large excess of hydrazine hydrate (the amount of hydrazine hydrate added is 120,000 times that of the cadmium source). Although this method can better solve the problem of generating soluble salts and precipitation, but A large amount of hydrazine hydrate reagent needs to be consumed, and hydrazine hydrate has high toxicity, which will cause environmental pollution and increase the industrial production cost of quantum dots

Method used

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  • Rapid preparation method of cadmium telluride quantum dot
  • Rapid preparation method of cadmium telluride quantum dot
  • Rapid preparation method of cadmium telluride quantum dot

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] (1) Dissolve 0.7mmol of hydroxylamine hydrochloride in 50ml of deionized water, and adjust the acidity of the solution to pH=9;

[0026] (2) Dissolve 0.05mmol tellurium dioxide in NaOH solution with a concentration of 1mol / L;

[0027] (3) At room temperature, dissolve 1.0mmol cadmium chloride in 50ml deionized water, then add 1.6mmol thioglycolic acid, and stir;

[0028] (4) adding dropwise a sodium hydroxide solution with a concentration of 1 mol / L to the solution prepared in step (3), adjusting the acidity of the solution to be pH=9 to obtain a cadmium precursor solution;

[0029] (5) Under stirring, add the solutions prepared in steps (1), (2) and (4) into a 250ml three-necked bottle in turn, seal and stir;

[0030] (6) The solution prepared in step (5) was heated and refluxed at 100°C for 30 minutes, and the whole process was carried out under magnetic stirring to obtain a water-soluble cadmium telluride quantum dot solution.

[0031] figure 1 Shown are the homog...

Embodiment 2

[0033] (1) Dissolve 1mmol of hydroxylamine hydrochloride in 50ml of deionized water, and adjust the acidity of the solution to pH=10;

[0034] (2) Dissolve 0.05mmol tellurium dioxide in NaOH solution with a concentration of 1mol / L;

[0035] (3) At room temperature, dissolve 1.0mmol cadmium perchlorate in 50ml deionized water, then add 2.4mmol thioglycolic acid, and stir;

[0036] (4) adding dropwise a sodium hydroxide solution with a concentration of 1 mol / L to the solution prepared in step (3), adjusting the acidity of the solution to pH=10 to obtain a cadmium precursor solution;

[0037] (5) Under stirring, add the solutions prepared in steps (1), (2) and (4) into a 250ml three-necked bottle in turn, seal and stir;

[0038] (6) The solution prepared in step (5) was heated and refluxed at 100°C for 30 minutes, and the whole process was carried out under magnetic stirring to obtain a water-soluble cadmium telluride quantum dot solution.

[0039] figure 1 Shown are the homog...

Embodiment 3

[0041] (1) Dissolve 1.5mmol of hydroxylamine hydrochloride in 50ml of deionized water, and adjust the acidity of the solution to pH=10;

[0042] (2) Dissolve 0.05mmol tellurium dioxide in NaOH solution with a concentration of 1mol / L;

[0043] (3) Dissolve 1.0mmol cadmium acetate in 50ml deionized water at room temperature, then add 3.2mmol thioglycolic acid and stir;

[0044] (4) adding dropwise a sodium hydroxide solution with a concentration of 1 mol / L to the solution prepared in step (3), adjusting the acidity of the solution to pH=10 to obtain a cadmium precursor solution;

[0045] (5) Under stirring, add the solutions prepared in steps (1), (2) and (4) into a 250ml three-necked bottle in turn, seal and stir;

[0046] (6) The solution prepared in step (5) was heated to reflux at 100°C for 60 minutes, and the whole process was carried out under magnetic stirring to obtain a water-soluble cadmium telluride quantum dot solution.

[0047] figure 1 Shown are the homogenized ...

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Abstract

The invention belongs to the field of nano material preparation, and in particular relates to a rapid preparation method of a cadmium telluride quantum dot. According to the invention, by using hydroxylamine hydrochloride as a reducing agent, a sulfhydryl compound as a stabilizing agent, a chlorine salt as a cadmium source, and tellurium dioxide as a tellurium source, in an air environment, a water phase system is rapidly prepared so that the cadmium telluride quantum dot with high fluorescence and good biocompatibility is directly synthesized. Compared with the prior art, the rapid preparation method has the advantages of mild synthesis conditions, simple steps, low price of used raw materials, environment friendliness, suitability of large-scale production, and higher actual application value.

Description

technical field [0001] The invention belongs to the preparation of inorganic semiconductor nanometer materials, in particular to a fast and green preparation method of water-soluble cadmium telluride quantum dots. Background technique [0002] Quantum dots are an emerging nano-fluorescent material. Compared with traditional organic fluorescent dyes, quantum dots have excellent optical properties such as wide excitation spectrum range, narrow emission spectrum and good peak shape, adjustable emission spectrum, and high quantum yield. It shows great potential in biomarkers and biosensing. Cadmium telluride quantum dots are currently the most studied and widely used group II-IV quantum dots. The preparation method of high-quality water-soluble cadmium telluride quantum dots has always been the focus of researchers. At present, the quantum dots used in biology are still mainly from organic phase synthesis. The quantum dots synthesized by this method have the advantages of monod...

Claims

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Application Information

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IPC IPC(8): C01B19/04B82Y30/00
Inventor 曾云龙冯磊匡慧艳黄昊文易守军奉泽昊夏晓东元晓云唐春然
Owner HUNAN UNIV OF SCI & TECH
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