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A kind of preparation method of metal telluride flower-like micro-nano structure

A technology of metal telluride and micro-nano structure, applied in the direction of binary selenium/tellurium compounds, etc., can solve the problems of difficult control of multi-dimensional morphology, complicated preparation process, and difficult preparation of multi-dimensional templates, so as to expand the application field of materials and simplify the process , low cost effect

Active Publication Date: 2019-11-29
HENAN INST OF ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The invention provides a low-cost, simple and convenient method for preparing metal telluride (copper telluride, bismuth telluride, cadmium telluride, lead telluride and antimony telluride) micro-nano structure method, which solves the complicated preparation process , Multi-dimensional templates are not easy to prepare and multi-dimensional morphology is not easy to control, etc.

Method used

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  • A kind of preparation method of metal telluride flower-like micro-nano structure
  • A kind of preparation method of metal telluride flower-like micro-nano structure
  • A kind of preparation method of metal telluride flower-like micro-nano structure

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Embodiment 1

[0023] The preparation method of the metal telluride flower-like micro-nano structure in this example, the synthesis of Cu 7 Te 4 The flower-like micro-nano structure, the steps are as follows: take 0.05 mmol (0.1132 g) of sodium tellurite, 0.4 g of polyvinylpyrrolidone (molecular weight of 24000), 0.0932 g of sodium acetate, 4 mL of ethylenediamine, 0.2 g Zinc acetylacetonate and 20 mL of ethylene glycol were added to a 50 mL three-necked flask to form a mixed solution and heated to 50 o C for 40 minutes to exclude oxygen, then heated to 175 o C until the solution turns brown. Then add 0.229 g of copper acetylacetonate, react for half an hour, and use ethanol to centrifuge and purify more than twice to obtain Cu 7 Te 4 flower-like micro-nanostructures. (Scanning electron microscope and X-ray diffraction pictures are shown in figure 1 ).

Embodiment 2

[0025] The preparation method of the metal telluride flower-like micro-nano structure in this example, the synthesis of Bi 4 Te 3 The flower-like micro-nano structure, the steps are as follows: take 0.05 mmol (0.1132 g) of sodium tellurite, 0.4 g of polyvinylpyrrolidone (molecular weight of 24000), 0.0932 g of sodium acetate, 4 mL of ethylenediamine, 0.2 g Zinc acetylacetonate and 20 mL of ethylene glycol were added to a 50 mL three-necked flask to form a mixed solution and heated to 50 o C for 40 minutes to exclude oxygen, then heated to 175 o C until the solution turns brown. Then quickly add 0.1053 g of bismuth chloride, react for half an hour, and use ethanol to centrifuge and purify more than twice to get Bi 4 Te 3 flower-like micro-nanostructures. (Scanning electron microscope and X-ray diffraction pictures are shown in figure 2 ).

Embodiment 3

[0027] The preparation method of the metal telluride flower-like micro-nano structure in this example, the synthesis of Sb 2 Te 3 The steps are as follows: Take 0.05 mmol (0.1132 g) of sodium tellurite, 0.4 g of polyvinylpyrrolidone (molecular weight: 24000), 0.0932 g of sodium acetate, 4 mL of ethylenediamine, 0.2 g Zinc acetylacetonate and 20 mL of ethylene glycol were added to a ready-made mixed solution in a 50 mL three-neck flask and heated to 50 o C for 40 minutes to exclude oxygen, then heated to 175 o C until the solution turns brown. Then quickly add 0.1000 g of antimony acetate, react for half an hour, and use ethanol to centrifuge and purify more than twice to get Sb 2 Te 3 flower-like micro-nanostructures. (Scanning electron microscope and X-ray diffraction pictures are shown in image 3 ).

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Abstract

The invention discloses a preparation method of flower-like micro-nano structures of metal tellurides. The preparation method belongs to the technical field of preparation of semiconductor materials.The method comprises the steps of dissolving sodium tellurite, polyvinylpyrrolidone, sodium acetate, ethanediamine and zinc acetylacetonate into ethylene glycol, removing oxygen in an obtained solution in an inert environment, and heating to obtain a precursor; then, respectively adding copper acetylacetonate, bismuth acetylacetonate, cadmium acetylacetonate, lead acetylacetonate and antimony acetylacetonate so as to successfully prepare the flower-like micro-nano structures of copper telluride, bismuth telluride, cadmium telluride, lead telluride and antimony telluride. The diameters of the prepared flower-like micro-nano structures of the copper telluride, the bismuth telluride, the cadmium telluride, the lead telluride and the antimony telluride are 8-10 microns. The method has the advantages of being simple in synthetic process, good in repeatability, safe and environmentally friendly, and cost-saving. Based on the characteristics of the preparation method, the preparation method has a very high value in the aspects of laboratory research and industrial applications.

Description

technical field [0001] The invention relates to the technical field of preparation of micro-nano structures, in particular to a method for preparing metal telluride flower-like micro-nano structures. Background technique [0002] The thermoelectric conversion technology utilizes both the Seebeck effect thermoelectric power generation technology and the Peltier effect thermoelectric refrigeration technology of materials. Thermoelectric power generation and refrigeration devices made of thermoelectric materials have the advantages of small size, light weight, simple structure, strong and durable, no pollution, no wear, no noise, no moving parts, safe and reliable, and have broad application prospects. [0003] In the past few decades, micro-nanostructures have attracted special attention in basic research and industry due to their unique optical, electrical, thermal properties and their potential applications. With the development of preparation technology, designing and cons...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B19/04
Inventor 牛金钟徐巍巍马晓华田贵敏康秀宝郝好山
Owner HENAN INST OF ENG
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