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Preparation method of cadmium selenide nano powder

A technology of nano-powder and cadmium selenide, which is applied in the field of preparation of cadmium selenide nano-powder, can solve the problems of using toxic organics, complicated operation process, long preparation period and the like, and achieves low temperature, low preparation temperature, excellent The effect of optoelectronic properties

Inactive Publication Date: 2015-01-07
LIAOCHENG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the above several methods have the following disadvantages, such as the use of special devices, the use of toxic organic substances during preparation, the operation process is more complicated, the preparation cycle is longer, and the preparation yield is lower.

Method used

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  • Preparation method of cadmium selenide nano powder
  • Preparation method of cadmium selenide nano powder

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] (1) Weigh 0.002 mol of selenium, add it to 3 ml of concentrated nitric acid, heat and stir continuously until it is completely dissolved; then add 50 ml of deionized water.

[0022] (2) Weigh 0.0016 mol of cadmium nitrate and 0.0017 mol of citric acid respectively, and dissolve them in the solution obtained in step (1).

[0023] (3) Place the solution obtained in step (2) on an electric heating mantle at a temperature of 300°C for heating and stirring; as the water evaporates, a colloidal precursor is obtained; further heating the precursor burns and releases a large amount of smoke, and waits for the reaction to stop. The cadmium selenide nanopowder is obtained.

[0024] The X-ray diffraction pattern of prepared cadmium selenide nanopowder is as follows figure 1 As shown, it can be seen that the powder is hexagonal cadmium selenide, and the crystallization is good; the emission spectrum of the prepared cadmium selenide nanopowder under the excitation of 325 nm wavelen...

Embodiment 2

[0026] (1) Weigh 0.002 mol of selenium, add it to 3 ml of concentrated nitric acid, heat and stir continuously until it is completely dissolved; then add 40 ml of deionized water.

[0027] (2) Weigh 0.0014 mol of cadmium nitrate and 0.0012 mol of citric acid respectively, and dissolve them in the solution obtained in step (1).

[0028] (3) Place the solution obtained in step (2) on an electric heating mantle with a temperature of 250°C for heating and stirring; as the water evaporates, a colloidal precursor is obtained; further heating the precursor burns and releases a large amount of smoke, and waits for the reaction to stop. The cadmium selenide nanopowder is obtained.

Embodiment 3

[0030] (1) Weigh 0.002 mol of selenium, add it to 3 ml of concentrated nitric acid, heat and stir continuously until it is completely dissolved; then add 60 ml of deionized water.

[0031] (2) Weigh 0.0018 mol of cadmium nitrate and 0.003 mol of citric acid respectively, and dissolve them in the solution obtained in step (1).

[0032] (3) Place the solution obtained in step (2) on a heating mantle with a temperature of 400°C for heating and stirring; with the evaporation of water, a colloidal precursor is obtained; further heating the precursor burns and releases a large amount of smoke, and waits for the reaction to stop. The cadmium selenide nanopowder is obtained.

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Abstract

The invention discloses a preparation method of cadmium selenide nano powder, which comprises the following steps: (1) weighing selenium according to the stoichiometric proportion, adding a proper amount of concentrated nitric acid, and continuously heating and stirring until the selenium is completely dissolved; adding a right amount of deionized water; (2) respectively weighing cadmium nitrate and citric acid which are respectively 0.7-0.9 and 0.6-1.5 times by mole of the selenium, and dissolving in the solution obtained in the step (1); and (3) putting the obtained solution on an electric jacket with the temperature of 250-400 DEG C, obtaining a colloid precursor as the water is evaporated, further heating the precursor to combust and discharge abundant flue gas, and obtaining the cadmium selenide nano powder when the reaction stops. The preparation method has the advantages of low preparation temperature, no need of special equipment, simple process and high yield, is easy to operate, and can be used for mass production.

Description

technical field [0001] The invention relates to a preparation method of cadmium selenide nanometer powder, which belongs to the field of inorganic synthesis of nanomaterials. Background technique [0002] Cadmium selenide (CdSe) is one of the most studied semiconductor nanomaterials in the II-VI group. Compared with bulk materials, the absorption band of CdSe nanomaterials is blue-shifted significantly, making it more favorable for semiconductor optics, electricity and Some novel properties have been obtained in aspects such as mechanics, so it has potential applications in optoelectronic devices, biosensors, solar cells and other fields. [0003] At present, the preparation methods of CdSe nanomaterials mainly include: Hot injection liquid phase method, solvothermal method, vapor phase deposition method, etc. The hot injection method is to inject a solution containing Cd ions and Se ions into an organic solution dissolved with trioctylphosphine oxide at a temperature of 20...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B19/04B82Y30/00
CPCC01B19/007C01P2002/72
Inventor 张大凤蒲锡鹏李红苏昌华吕冬冬
Owner LIAOCHENG UNIV
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