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Preparation method of nanometer cadmium selenide sulfide material

A technology of cadmium selenide and nano-sulfur, applied in the direction of nanotechnology, binary selenium/tellurium compounds, etc., can solve the problems of lack of water solubility and biocompatibility, unbelievable combination of two kinds of nanoparticles, adjustable preparation, difficult to grasp, etc. Problems, to achieve good water solubility and biocompatibility, safe and stable preparation process, easy to master the effect of control

Inactive Publication Date: 2014-08-13
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Summarizing the above preparation methods, it is not difficult to find that most of the preparation processes, the whole system is relatively complicated, the preparation process is cumbersome, the conditions are harsh and difficult to grasp, the energy consumption is more, the cost is high, the experiment process is relatively toxic and has certain hazards, most of them only It can realize the preparation of a single system, and it is unbelievable that the composite and adjustable preparation of two kinds of nanoparticles, and the prepared nano-CdSe x S 1-X (0≤x≤1) is large in size, cannot achieve good recombination and transformation between CdSe and CdS, and has no water solubility and biocompatibility

Method used

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  • Preparation method of nanometer cadmium selenide sulfide material
  • Preparation method of nanometer cadmium selenide sulfide material
  • Preparation method of nanometer cadmium selenide sulfide material

Examples

Experimental program
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Effect test

Embodiment 1

[0024] Weigh 0.0154g of sodium selenite, add 2ml of deionized water to dissolve, then add 20ml of glycerin and stir to dissolve to obtain a selenite solution; weigh 1.0078g of glucose and add 2ml of water to dissolve;

[0025] After heating the obtained sodium selenite solution to 80°C, add glucose solution and 1ml stabilizer MPA, and heat to 160°C, during which the solution gradually changes from colorless to light yellow, orange, light red, dark red suspension, when When the temperature rises to 220°C, the solution becomes colorless, and after cooling to room temperature, black suspended matter appears in the solution, add 10ml of water to dissolve and dilute, then heat to 260°C, when the solution becomes colorless, cool to room temperature, and selenium can be obtained Precursor solution;

[0026] Weigh CdCl 2 ×2.5H 2 O 0.0211g, polyethylene glycol 0.2166g, add 15ml of deionized water, stir and dissolve at 60°C, add 0.1ml of MPA, add 10ml of sodium hydroxide solution (1mo...

Embodiment 2

[0029] Weigh 0.0243g of sodium sulfide crystals, add 10ml of deionized water to dissolve, then add 20ml of glycerin and 1ml of MPA and stir evenly to obtain a sulfur precursor solution;

[0030] Weigh CdCl 2 *2.5H 2 O 0.0203g, polyethylene glycol 0.2038g, add 10ml of deionized water, stir and dissolve at 60°C, add 0.1ml of MPA, add 15ml of sodium hydroxide solution (1mol / L), adjust the pH to 11, and obtain the cadmium precursor solution;

[0031]After the prepared cadmium precursor solution was heated to 100°C, the prepared sulfur precursor solution was gradually added dropwise, and then the temperature was gradually raised to 260°C, during which the color of the solution changed from light yellow to yellow-green. The nano-CdS solution can be obtained by incubating for 15 minutes, and centrifuged at 12,000 rpm for 30 minutes to obtain water-soluble and biocompatible nano-CdS powder.

Embodiment 3

[0033] Weigh 0.0078g of sodium selenite, add 2ml of deionized water to dissolve, then add 10ml of glycerin and stir to dissolve to obtain a selenite solution; weigh 0.1528g of glucose and add 2ml of water to dissolve;

[0034] Heat the dissolved sodium selenite solution to 80°C, add glucose solution and 1ml stabilizer MPA, and heat to 160°C, during which the solution gradually changes from colorless to light yellow, orange, light red, deep red suspension, When the temperature rises to 220°C, the solution becomes colorless, and after cooling to room temperature, a black suspension appears in the solution, add 10ml of water to dissolve and dilute, then heat to 260°C, when the solution becomes colorless, cool to room temperature, and you can get Selenium precursor solution;

[0035] Weigh 0.0108g of sodium sulfide crystals, add 5ml of deionized water to dissolve, then add 10ml of glycerin and 0.5ml of MPA and stir evenly to obtain the sulfur precursor solution;

[0036] Weigh 0....

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Abstract

The invention relates to a preparation method of a nanometer cadmium selenide sulfide material, comprising the following steps of: 1) weighing cadmium crystal powder and a stabilizer C, and adding de-ionized water, 2 agitating and dissolving and then adding a stabilizer B, and adjusting the pH to obtain a cadmium precursor solution; 2) heating the prepared cadmium precursor solution, gradually dropping into selenium precursor solution or / and sulfur precursor solution, and then gradually heating up, preserving the temperature to obtain nanometer cadmium selenide sulfide, and centrifuging to obtain nanometer cadmium selenide sulfide powder. According to the preparation method disclosed by the invention, the preparation condition is at a normal pressure, the reaction temperature is easy to be realized, the reaction time is short, the whole preparation process is safe and stable, convenient to control and easy to implement, the raw material is low in cost, free from poison and free from harm, and the obtained product has the advantages of uniform grain diameter, small grain size (2-6nm), good crystallinity and good water solubility and biocompatibility.

Description

technical field [0001] The invention relates to the preparation of nanometer materials, in particular to a preparation method of nanometer cadmium sulfur selenide material. technical background [0002] CdSe (1.74eV) has a narrow direct transition band gap and has excellent photoconductive properties, while its quantum dots have attracted more and more people's attention due to their excellent fluorescent properties. It has high fluorescence intensity and long photofading time, which is very suitable for bioluminescence labeling, and is widely used in optical materials, solar materials and sensors. CdS is a typical optoelectronic semiconductor material. The introduction of doping elements is an important means to regulate the luminescence characteristics of semiconductors, so the research based on CdS nanocrystal doping system has attracted much attention. In general, coating nanocrystals with inorganic semiconductor materials with similar lattice parameters can be benefic...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B19/04B82Y40/00
Inventor 谭国龙姜沣芮
Owner WUHAN UNIV OF TECH
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