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Metal telluride nanotube and universal preparation method thereof

A metal telluride and nanotube technology, applied in the direction of metal selenide/telluride, binary selenium/telluride compound, nanotechnology, etc., can solve the problem that the energy conversion efficiency of metal telluride cannot meet the application requirements and is not universal and other issues, to achieve safe and pollution-free operation, lower thermal conductivity, and good repeatability

Pending Publication Date: 2021-11-02
XI'AN PETROLEUM UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to overcome the shortcomings of the above-mentioned prior art, to provide a metal telluride nanotube and its universal preparation method, to solve the problem that the preparation method in the prior art is not universal, and to prepare metal telluride The energy conversion efficiency of compounds is difficult to meet the application requirements

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  • Metal telluride nanotube and universal preparation method thereof
  • Metal telluride nanotube and universal preparation method thereof
  • Metal telluride nanotube and universal preparation method thereof

Examples

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Embodiment 1

[0042] 0.2394g (1.5mmol) of TeO 2 , 0.5g PVP and 5.6g (10mmol) KOH, mixed and dissolved in 30ml EG at room temperature, fully dissolved into a transparent liquid by magnetic stirring; then poured into a 100ml three-necked bottle, under nitrogen protection, circulating water cooling and Under the condition of magnetic stirring, the mixed solution is heated to 130 DEG C, and the concentration of 0.25ml is rapidly injected into 85% hydrazine hydrate, and the mixed solution containing tellurium elemental nanotubes (such as figure 1 shown), lower the solution temperature to 120°C for use;

[0043] 0.485g (2mmol) of bismuth nitrate pentahydrate (Bi(NO 3 ) 3 ·5H 2 O) The particles are mixed with 5ml of ethylene glycol, and the mixed solution is heated to 80°C under magnetic stirring. When the solution is colorless and transparent, use a pipette gun to inject it into the tellurium nanotube solution at 120°C and keep it warm for one hour and then cool it down to room temperature. ...

Embodiment 2

[0046] 0.2394g (1.5mmol) of TeO 2 , 0.5g PVP and 5.6g (10mmol) KOH, mixed and dissolved in 30ml EG at room temperature, fully dissolved into a transparent liquid by magnetic stirring; then poured into a 100ml three-necked bottle, under nitrogen protection, circulating water cooling and Under the condition of magnetic stirring, heat the mixed solution to 130°C, quickly inject 0.25ml of hydrazine hydrate with a concentration of 85%, and after 0.5 hours of heat preservation reaction, a mixed solution containing tellurium simple substance nanotubes can be obtained, and the temperature of the solution is lowered to 120°C for use;

[0047] 0.57g (3mmol) of lead acetate trihydrate (Pb(CH 3 COO) 2 ·3H 2 0) mix with 5ml ethylene glycol, under magnetic stirring, the mixed solution is heated to 80 ℃, when the solution is colorless and transparent, it is injected into the tellurium nanotube solution at 120 ℃ with a pipette gun and incubated for one hour and then cooled to room tempera...

Embodiment 3

[0049] 0.2394g (1.5mmol) of TeO 2 , 0.5g PVP and 5.6g (10mmol) KOH, mixed and dissolved in 30ml EG at room temperature, fully dissolved into a transparent liquid by magnetic stirring; then poured into a 100ml three-necked bottle, under nitrogen protection, circulating water cooling and Under magnetic stirring conditions, heat the mixed solution to 130°C, quickly inject 0.25ml of hydrazine hydrate with a concentration of 85%, and after 0.5 hours of heat preservation reaction, a mixed solution containing tellurium simple substance nanotubes can be obtained, and the temperature of the solution is cooled to 30°C. use;

[0050] The tellurium nanotube solution was centrifugally washed with a high-speed centrifuge, washed three times with deionized water and absolute ethanol, then dissolved in 5 ml of ethylene glycol, and magnetically stirred at 30°C. At the same time, 0.509g of AgNO 3 Dissolve in 5ml of ethylene glycol, and stir gently with a glass rod for 5min, then drop the AgNO...

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Abstract

The invention discloses a metal telluride nanotube and a universal preparation method thereof. The preparation method comprises the following steps: mixing tellurium oxide, polyvinylpyrrolidone and potassium hydroxide by adopting a solvothermal synthesis method, dissolving the mixture in ethylene glycol, heating the solution to a certain temperature, and then adding a proper amount of hydrazine hydrate for reaction to obtain a solution containing a tellurium elementary substance nanotube; and under a certain temperature condition, adding a mixed solution of a metal precursor and ethylene glycol into the tellurium nanotube solution, and conducting reacting to obtain the metal telluride nanotube. The preparation method has universality, so that various metals can react with the tellurium nanotube to form the metal telluride nanotube, and the thermal conductivity of the material can be remarkably reduced and the thermoelectric performance of the material can be improved through the strong scattering effect of the tube wall on phonons under the condition of ensuring relatively good electric transport performance.

Description

technical field [0001] The invention belongs to the field of nanomaterial preparation, and in particular relates to a metal telluride nanotube and a universal preparation method thereof. Background technique [0002] Thermoelectric materials can realize mutual conversion between thermal energy and electric energy, and have significant advantages such as no pollution, no noise, long life and high reliability, and are ideal green and environmentally friendly all-solid-state energy utilization methods. However, the current thermoelectric materials still have the problem of low energy conversion efficiency. [0003] The energy conversion efficiency of thermoelectric materials mainly depends on the dimensionless thermoelectric figure of merit, ZT=(α2σ / ) T, where T is the temperature, σ and α are the electrical conductivity, Seebeck coefficient and thermal conductivity of the material, respectively. Obviously, to improve the thermoelectric figure of merit ZT, the material needs t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B19/04B82Y40/00
CPCC01B19/007B82Y40/00C01P2006/32
Inventor 刘帅刘迎港陈国祥
Owner XI'AN PETROLEUM UNIVERSITY
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