Unlock instant, AI-driven research and patent intelligence for your innovation.

Rapid preparation method of cadmium telluride quantum dots

A cadmium telluride quantum dot, fast technology, applied in the direction of binary selenium/tellurium compound, nanotechnology for materials and surface science, nanotechnology, etc., can solve the high toxicity of hydrazine hydrate, improve the industrial production cost of quantum dots, Environmental pollution and other problems, to achieve the effect of easy implementation, simple preparation steps, high quantum yield

Inactive Publication Date: 2014-10-29
HUNAN UNIV OF SCI & TECH
View PDF1 Cites 0 Cited by
  • Summary
  • Abstract
  • 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 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

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Rapid preparation method of cadmium telluride quantum dots
  • Rapid preparation method of cadmium telluride quantum dots
  • Rapid preparation method of cadmium telluride quantum dots

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) 0.05mmol tellurium dioxide is dissolved in a 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 mercaptoacetic acid, and stir;

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

[0029] (5) under stirring, the solution prepared by steps (1), (2) and (4) is added successively in a 250ml three-necked bottle, sealed and stirred;

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

[0031] figure 1 Shown are t...

Embodiment 2

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

[0034] (2) 0.05mmol tellurium dioxide is dissolved in a 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 concentration of sodium hydroxide solution of 1mol / L to the solution prepared in step (3), adjusting the acidity of the solution to be pH=10 to obtain a precursor solution of cadmium;

[0037] (5) under stirring, the solution prepared by steps (1), (2) and (4) is added successively in a 250ml three-necked bottle, sealed and stirred;

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

[0039] figure 1 Shown a...

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) 0.05mmol tellurium dioxide is dissolved in a NaOH solution with a concentration of 1mol / L;

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

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

[0045] (5) under stirring, the solution prepared by steps (1), (2) and (4) is added successively in a 250ml three-necked bottle, sealed and stirred;

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

[...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

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

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
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