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Method for synthesizing CdTe semiconductor fluorescence nanocrystalline material and synthesizing system thereof

A technology of fluorescent nano and crystal materials, which is applied in the field of preparation of nano crystal materials, can solve the problems of complex synthesis process, high toxicity, and harsh conditions, and achieve the effects of low preparation cost, good fluorescent properties, and good repeatability

Inactive Publication Date: 2007-12-05
JILIN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] At present, there are many methods for synthesizing CdTe semiconductor fluorescent nanocrystal materials, but the synthesis method with the highest quality is the organometallic method. The CdTe nanocrystal materials synthesized by this method have high quantum efficiency and good spectral properties, but in aqueous However, its solubility and stability are relatively poor, and it must undergo complicated post-treatment before it can be applied to biological analysis. The synthesis process is complex, the conditions are harsh, and the toxicity is very high. Synthetic, unable to achieve industrialization
At present, there are also some aqueous phase synthesis methods. Compared with organometallic methods, the toxicity and hazards are reduced to a certain extent, but an external heat source (≥100°C) or radiation is still required to accelerate the growth of CdTe nanocrystals, and the synthesized CdTe nanocrystals Material quality could be improved

Method used

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  • Method for synthesizing CdTe semiconductor fluorescence nanocrystalline material and synthesizing system thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] 1) Preparation of tellurium source

[0030] The process is: take 90ml of water and put it into the three-necked flask 1, then add 2.4mg of NaBH 4 and 4 mg tellurium powder, NaBH 4 The molar ratio of tellurium powder and tellurium powder is 2:1, and high-purity argon gas is introduced through the feeding pipe 8 directly above the three-necked flask 1, and the air in the three-necked flask 1 is evacuated, and the magnetic stirring device 9 is evenly stirred at room temperature, and the NaBH 4 React with tellurium powder for 60 minutes, the reaction equation is: Te+NaBH 4 +H 2 O→NaHTe+Na 2 B 4 o 7 +H 2 ↑, the products included in the solution after the reaction are NaHTe, NaHTe 2 B 4 o 7 and H 2 , the NaHTe content in the solution is 0.32mmol / l. If the hydrogen produced increases the pressure in the three-necked flask 1 and affects the addition of other substances, it can be decompressed by opening the discharge valve 5 .

[0031] 2) Preparation of cadmium sour...

Embodiment 2

[0039] 1) Preparation of tellurium source

[0040] The process is: take 90ml of water and put it into the three-neck flask 1, then add 240mgNaBH4 and 90mg tellurium powder, NaBH 4 The molar ratio of tellurium powder to tellurium powder is 9.2:1. High-purity argon gas is introduced through the feeding pipe 8 directly above the three-necked flask 1, and the air in the three-necked flask 1 is evacuated. At room temperature, the magnetic stirring device 9 stirs evenly, and NaBH 4 React with tellurium powder for 90 minutes, the reaction equation is: Te+NaBH 4 +H 2 O→NaHTe+Na 2 B 4 o 7 +H 2 ↑, the products included in the solution after the reaction are NaHTe, NaHTe 2 B 4 o 7 and H 2 , the NaHTe content in the solution is 7.0mmol / l. If the hydrogen produced increases the pressure in the three-necked flask 1 and affects the addition of other substances, it can be decompressed by opening the discharge valve 5 .

[0041] 2) Preparation of cadmium source

[0042] The process...

Embodiment 3

[0049] 1) Preparation of tellurium source

[0050] The process is: take 90ml of water and put it into the three-neck flask 1, then add 120mg of NaBH 4 and 90 mg tellurium powder, NaBH 4 The molar ratio of tellurium powder and tellurium powder is 4.6:1, and high-purity argon gas is introduced through the feeding pipe 8 directly above the three-necked flask 1, and the air in the three-necked flask 1 is evacuated, and the magnetic stirring device 9 is evenly stirred at room temperature, and the NaBH 4 React with tellurium powder for 90 minutes, the reaction equation is: Te+NaBH 4 +H 2 O→NaHTe+Na 2 B 4 o 7 +H 2 ↑, the products included in the solution after the reaction are NaHTe, NaHTe 2 B 4 o 7 and H 2 , the NaHTe content in the solution was 3.9mmol / l. If the hydrogen produced increases the pressure in the three-necked flask 1 and affects the addition of other substances, it can be decompressed by opening the discharge valve 5 .

[0051] 2) Preparation of cadmium sou...

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Abstract

The present invention relates to chemical technology, and discloses environment friendly process and system for synthesizing nanometer fluorescent semiconductor CdTe crystal material. The synthesis process includes the following steps: preparing Te source, preparing Cd source, mixing the Te source and the Cd source at normal temperature to obtain water solution of CdTe crystal nucleus, adding initiator hydrazine hydrate to initiate CdTe crystal growth and monitoring the growth state with one optical fiber spectroscope, adding terminator n-hexanol to terminate growth after the CdTe crystal reaches its target value, and centrifuging in a high speed centrifuge to eliminate supernatant and obtain CdTe crystal solution. The synthesis system consists of one synthesis unit, one ultraviolet lamp, one detector, one small optical fiber spectroscope and one computer with special software.

Description

technical field [0001] The invention relates to a preparation method and device of a nano crystal material, more specifically, it relates to a method for synthesizing a CdTe (cadmium telluride) semiconductor fluorescent nano crystal material. The present invention also relates to a synthetic system for realizing this method Background technique [0002] CdTe semiconductor fluorescent nanocrystal material is a semiconductor material with important application value. Due to the special spectroscopic properties of CdTe semiconductor fluorescent nanocrystal materials, many researchers have been interested in them in recent years, especially in the field of life sciences. CdTe nanocrystalline materials are widely used in the fields of biology, materials and medicine due to their special photoelectric properties. [0003] At present, there are many methods for synthesizing CdTe semiconductor fluorescent nanocrystal materials, but the synthesis method with the highest quality is ...

Claims

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Application Information

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IPC IPC(8): C30B29/48C30B7/14C01B19/04C01G11/00
Inventor 周建光刘岩沈启慧于东冬黄校亮杨莹丽金丽范宏亮张磊赵晓丽
Owner JILIN UNIV
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