Method for synthesis of metal telluride nanotubes

Abstract

The invention relates to the field of chemistry and especially relates to a method for synthesis of metal telluride nanotubes. The method comprises the following steps of A, in a nitrogen environment, heating a mixture of oleic acid and oleylamine, B, keeping a temperature after heating, pouring a trioctylphosphine oxide extraction predecessor of tellurium into the mixture in first set time, and carrying out a chemical reaction process in second set time to obtain tellurium nano-wires, C, cooling the solution containing the tellurium nano-wires, and pouring phenylhydrazine and a trioctylphosphine oxide extraction predecessor of bismuth or lead into the solution to obtain a metal telluride, D, after the temperature obtained in the step C is stable, carrying out a metal alloying reaction process in third set time to produce a third primary product, E, repeatedly cleaning the third primary product according to an analogue intermiscibility theory to remove the organic solvent in the third primary product and to obtain a fourth primary product, and F, repeatedly cleaning the fourth primary product by a complexing agent to remove unreacted tellurium in the fourth primary product and to obtain the metal telluride nanotubes. The method greatly improves purity and a yield of the metal telluride product.

Description

technical field [0001] The invention relates to the field of chemistry, in particular to a method for synthesizing metal telluride nanotubes. Background technique [0002] For metal tellurides such as bismuth telluride (Bi 2 Te 3 ), lead telluride (PbTe), tellurium telluride (Sb 2 Te 3 ), silver telluride (Ag 2 Te), etc., are typical inorganic thermoelectric materials. Dresselhaus M S., an internationally renowned thermoelectric theory expert, found that if these inorganic thermoelectric materials are prepared into one-dimensional nanostructures (such as nanowires, nanotubes, etc.), their thermoelectric properties will increase exponentially. Due to the phonon scattering effect in one-dimensional nanotubes, its thermoelectric performance is better than that of the corresponding nanowire structure, so the synthesis of metal telluride nanotubes has more application potential, but there are not many successful synthesis cases of these telluride nanotubes. In the few repor...

AI Technical Summary

Problems solved by technology

Due to the phonon scattering effect in one-dimensional nanotubes, its thermoelectric performance is better than that of the corresponding nanowire structure, so the synthesis of metal telluride nanotubes has more application potential, but there are not many successful synthesis cases of these telluride nanotubes. In the few reports on the synthesis of metal telluride nanotubes, the experimental methods used are very limited, such as hydrothermal method, liquid phase reaction method, electrochemical deposition method, template method

These methods can only achieve the synthesis of certain metal telluride nanotubes, and cannot be extended to other metal tellurides

In summary, although the nanotube structure has higher thermoelectric performance compared with the metal telluride nanowire, in the actual synthesis, the synthesis system of the metal telluride nanotube is more limited, and there is still a lack of a method for most Metal tellurides are suitable for the synthesis of nanotube structures. At the same time, the existing nanotube synthesis methods, such as electrochemical deposition, template method, etc., have the disadvantages of expensive equipment, poor operability, and cannot be applied to large-scale industrial production.

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