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Tellurium-manganese-cadmium nano-powder and preparation method thereof

A nano-powder, cadmium-manganese-telluride technology, applied in the direction of nanotechnology, nanotechnology, chemical instruments and methods, etc., can solve the complex preparation process, quantum dots contain impurities, and are not purely equal, and achieve simple operation and powder size Good uniformity and dispersion

Pending Publication Date: 2021-09-24
CHANGAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the preparation process is complicated, and the prepared quantum dots contain impurities and are not pure phase

Method used

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  • Tellurium-manganese-cadmium nano-powder and preparation method thereof
  • Tellurium-manganese-cadmium nano-powder and preparation method thereof
  • Tellurium-manganese-cadmium nano-powder and preparation method thereof

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preparation example Construction

[0030] In the preparation method of the cadmium manganese telluride nano-powder of the present invention, the cadmium manganese telluride nano-powder has a pure-phase sphalerite structure, cadmium chloride and manganese chloride are used as the cadmium source and the manganese source, and sodium tellurite is the tellurium source. Sodium citrate and mercaptopropionic acid are used as stabilizers and protective agents, sodium borohydride is used as a reducing agent, a pH regulator is used to control the solution to be strongly alkaline, and cadmium manganese telluride nanometer powder is obtained through hydrothermal reaction. CdCl 2 , MnCl 2 and Na 2 TeO 3 (or K 2 TeO 3 ) molecule molar ratio, or the molar ratio of Cd, Mn and Te atoms, the molar ratio of Cd, Mn and Te in cadmium salt, manganese salt and tellurite is: 1:(0.1~0.5):(1.1~1.5 ); the molar ratio of cadmium salt, sodium citrate and mercaptopropionic acid is: 1:(0.1~1):(1~5) refers to CdCl 2 (cadmium salt), Na 3...

Embodiment 1

[0037]According to the molar ratio of cadmium source and manganese source as 1:0.5, weigh 0.4568g of cadmium chloride and 0.1980g of manganese chloride, add 30ml of deionized water to form a mixed solution, and magnetically stir; The molar ratio is 1:0.1, then weigh 0.0664g of sodium citrate, and add it to the solution; then add 10 drops of mercaptopropionic acid with a volume fraction of 98% to form a suspension, and stir it magnetically for 10 minutes; The molar ratio of acid salt is 1:1.5, weigh 0.6645g sodium tellurite and dissolve it with deionized water (dissolved amount), add it under the condition of magnetic stirring, use pH adjuster (4mol / L sodium hydroxide solution) Adjust the pH value to 14; then according to the molar ratio of cadmium source and sodium borohydride as 1:18, weigh 1.3617g of sodium borohydride and dissolve it in ethanol, and add it under the same condition of magnetic stirring to finally obtain cadmium manganese telluride water Heat reaction precurs...

Embodiment 2

[0040] According to the molar ratio of cadmium source and manganese source as 1:0.5, weigh 0.2284g of cadmium chloride and 0.0990g of manganese chloride, add 30ml of deionized water to form a mixed solution, and magnetically stir; The molar ratio is 1:0.1, then weigh 0.0333g of sodium citrate, and add it to the solution; then add 10 drops of mercaptopropionic acid with a volume fraction of 98% to form a suspension, and stir it magnetically for 10 minutes; The molar ratio of acid salt is 1:1.5, weigh 0.3324g sodium tellurite and dissolve it with deionized water (dissolved amount), add it under the condition of magnetic stirring, use pH adjuster (4mol / L sodium hydroxide solution) Adjust the pH value to 14; then according to the molar ratio of cadmium source and sodium borohydride as 1:18, weigh 0.6807g of sodium borohydride and dissolve it in ethanol, and add it under the same condition of magnetic stirring to finally obtain cadmium manganese telluride water Heat reaction precur...

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Abstract

The invention relates to a tellurium-manganese-cadmium nano-powder and a preparation method thereof. The nano-powder is prepared by taking a cadmium salt, a manganese salt and a tellurite as reaction raw materials, adding sodium citrate and thiohydracrylic acid as stabilizers and a hydroboron as a reducing agent through a hydrothermal reaction. The molar ratio of Cd to Mn to Te in the cadmium salt, the manganese salt and the tellurite is 1: (0.1-0.5): (1.1-1.5); the molar ratio of the cadmium salt to the sodium citrate to the thiohydracrylic acid is 1: (0.1-1): (1-5). The process method is simple to operate, does not need a protective atmosphere, is controllable in powder size and low in reaction temperature, and the prepared product is of a pure-phase sphalerite structure. The powder can be used in the fields of radiation detectors, solar cell raw materials, photocatalysis and the like.

Description

Technical field [0001] The invention belongs to the field of inorganic material preparation, and relates to a nanometer powder of cadmium manganese telluride and its preparation method. More specifically, it relates to the hydrothermal method for preparing pure phase sphalerite structure nanometer powder of cadmium manganese telluride and its method. Background technique [0002] With the development of modern industrial technology and production towards micro and multi-digit, different types of radiation detectors play a vital role in the fields of medical, environment, industrial monitoring, solar energy, electronics and space research. At present, research on semiconductor radiation detector materials mainly focuses on wide bandgap compound semiconductor materials. Cadmium manganese telluride (CdMnTe) has a sphalerite structure. It has the advantages of large crystal band gap, high resistivity and large carrier mobility lifetime product. It has special photoelectric prope...

Claims

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Application Information

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IPC IPC(8): C01B19/00B82Y30/00B82Y40/00
CPCC01B19/007B82Y30/00B82Y40/00C01P2002/72C01P2002/80C01P2002/84C01P2004/03C01P2006/60C01P2004/64C01P2004/32C01P2002/30
Inventor 俞鹏飞邵汀荃刘文斐高攀登蒋璧如祁永武赵鹏
Owner CHANGAN UNIV
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