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A tellurium-bismuth compound material with a tellurium-bismuth ratio of 1/1 and its preparation method

A compound material, bismuth telluride technology, applied in the direction of selenium/tellurium compounds, chemical instruments and methods, metal selenides/tellurides, etc.

Inactive Publication Date: 2020-01-14
HUAIHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] After searching, it is found that there are few reports on tellurium-bismuth compound materials with a tellurium-bismuth molar ratio of 1 / 1.

Method used

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  • A tellurium-bismuth compound material with a tellurium-bismuth ratio of 1/1 and its preparation method
  • A tellurium-bismuth compound material with a tellurium-bismuth ratio of 1/1 and its preparation method
  • A tellurium-bismuth compound material with a tellurium-bismuth ratio of 1/1 and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] 1. Add 6mmol TeO 2 , 0.4g NaOH, 1.2g PVP were dissolved in 50ml ethylene glycol (EG), transferred to a three-necked flask and reacted at 160°C for 10 minutes; to obtain stock solution 1;

[0046]2. Add 1ml of hydrazine hydrate to the standby solution 1, and react at 160° C. for 20 minutes to obtain the standby solution 2; the hydrazine hydrate is commercially available hydrazine hydrate (analytically pure prepared by Tianjin Fuchen Chemical Preparation Factory), and its concentration Is 80% (volume percentage);

[0047] 3. Take 2mmol Bi 2 o 3 , 0.4g NaOH, and dissolved it in 10ml of ethylene glycol (EG) to obtain standby 3; then add standby solution 3 to standby solution 2, react at 160°C for 30 minutes, and then cool to room temperature. The product is obtained by centrifugation, and then washed several times with deionized water, acetone, and absolute ethanol, and then dried. The obtained powder can be preserved for various characterizations. Its characterization ...

Embodiment 2

[0049] 1. Add 6mmol TeO 2 , 0.4g NaOH, 1.0g PVP were dissolved in 50ml ethylene glycol (EG), transferred to a three-necked flask and reacted at 160°C for 10 minutes; to obtain stock solution 1;

[0050] 2. Add 1ml of hydrazine hydrate to the standby solution 1, and react at 160° C. for 20 minutes to obtain the standby solution 2; the hydrazine hydrate is commercially available hydrazine hydrate (analytically pure prepared by Tianjin Fuchen Chemical Preparation Factory), and its concentration Is 80% (volume percentage);

[0051] 3. Take 2mmol Bi 2 o 3 , 0.4g NaOH, and dissolved it in 10ml of ethylene glycol (EG) to obtain standby 3; then add standby solution 3 to standby solution 2, react at 160°C for 30 minutes, and then cool to room temperature. The product is obtained by centrifugation, and then washed several times with deionized water, acetone, and absolute ethanol, and then dried. The obtained powder can be preserved for various characterizations. Its characterization...

Embodiment 3

[0053] 1. Add 6mmol TeO 2 , 0.4g NaOH, 1.6g PVP were dissolved in 50ml ethylene glycol (EG), transferred to a three-necked flask and reacted at 160°C for 10 minutes; to obtain stock solution 1;

[0054] 2. Add 1ml of hydrazine hydrate to the standby solution 1, and react at 160° C. for 20 minutes to obtain the standby solution 2; the hydrazine hydrate is commercially available hydrazine hydrate (analytically pure prepared by Tianjin Fuchen Chemical Preparation Factory), and its concentration is 80% (volume percentage);

[0055] 3. Take 2mmol Bi 2 o 3 , 0.4g NaOH, and dissolved it in 10ml of ethylene glycol (EG) to obtain standby 3; then add standby solution 3 to standby solution 2, react at 160°C for 30 minutes, and then cool to room temperature. The product is obtained by centrifugation, and then washed several times with deionized water, acetone, and absolute ethanol, and then dried. The obtained powder can be preserved for various characterizations. Its characterization...

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Abstract

The invention relates to a tellurium-bismuth compounded material with a tellurium-bismuth ratio of 1:1 and a preparation method of the tellurium-bismuth compounded material and belongs to the technical field of thermoelectric material design and preparation. The mole ratio of tellurium to bismuth in the tellurium-bismuth compounded material is 1:1. The preparation method comprises the following steps: by taking TeO2 as a Te source and Bi2O3 as a Bi source, firstly, enabling a proper amounts of TeO2, sodium hydroxide, PVP (Polyvinyl Pyrrolidone) and ethylene glycol to react so as to obtain a standby liquid 1; further adding a proper amount of hydrazine hydrate, performing a reaction at 155-165 DEG C so as to obtain a standby liquid 2; uniformly mixing a proper amounts of Bi2O3, hydrazine hydrate and ethylene glycol, adding the standby liquid 2, enabling the components to react, cooling, performing solid-liquid separation, washing the obtained solid, and drying, thereby obtaining the tellurium-bismuth compounded material with the tellurium-bismuth ratio of 1:1. By adopting the method, the tellurium-bismuth compounded material with the tellurium-bismuth ratio of 1:1 is prepared for afirst time, essential conditions for widening application of tellurium-bismuth compounded materials are provided, and meanwhile a base for preparing thermoelectric materials with relatively excellentproperties can be also made.

Description

technical field [0001] The invention relates to a tellurium-bismuth compound material with a tellurium-bismuth ratio of 1 / 1 and a preparation method thereof, belonging to the technical field of photoelectric material design and preparation. Background technique [0002] Bismuth telluride compounds have been widely studied and applied due to their unique chemical and physical properties; bismuth telluride compounds prepared by current preparation methods are generally bismuth telluride (i.e. Bi 2 Te 3 ); as in CN101254903A, the inorganic salt of Bi and the inorganic salt of Te are made into solution A and solution B respectively, and react under heating conditions to obtain Bi 2 Te 3 . In CN103738929A, bismuth nitrate is used as raw material, bismuth nitrate is first dissolved in ethylene glycol, then nitric acid and surfactant are added to stir evenly, and then Te powder is added to carry out high temperature and high pressure reaction for 24 hours to obtain Bi 2 Te 3 S...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B19/00B82Y30/00B82Y40/00
CPCB82Y30/00B82Y40/00C01B19/007C01P2002/72C01P2004/03C01P2004/04C01P2004/13
Inventor 赵宇靖周方谌雄文宋克慧
Owner HUAIHUA UNIV