Lead telluride nano rod with uniform size, and preparation method and applications thereof

A nanorod and lead telluride technology is applied in the field of nanomaterials to achieve the effects of good solubility, uniform size distribution and simple preparation process

Active Publication Date: 2018-04-10
SUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, at present, the synthesis of lead telluride nanorods with uniform size, good solubility and strong quantum confinement effect under low temperature conditions (below 150 °C) by thermal injection has not been reported.

Method used

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  • Lead telluride nano rod with uniform size, and preparation method and applications thereof
  • Lead telluride nano rod with uniform size, and preparation method and applications thereof
  • Lead telluride nano rod with uniform size, and preparation method and applications thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] In this example, lead telluride nanorods were synthesized at a temperature of 100 °C, and the specific steps are as follows:

[0030] 1) Preparation of lead precursor: under nitrogen protection, 89 mg (0.4 mmol) of lead oxide, 170 mg (1 mmol) of trans-2-decenoic acid and 8 g of octadecene were added to a 50 mL three-necked flask , stirring for 1 hour at a temperature of 120 °C until the solution becomes clear and transparent, then vacuumizing for 1 hour at a temperature of 110 °C to remove water and oxygen in the three-necked flask to obtain a lead precursor, stand-by;

[0031] 2) Preparation of tellurium precursor: In a nitrogen glove box, add 153 mg (1.2 mmol) tellurium element into a glass bottle containing 1.2 ml tris(diethylamino)phosphine, and stir at room temperature until the tellurium element Completely dissolved in the solution to obtain a tellurium precursor, ready for use;

[0032] 3) Synthesis reaction under preset lead-tellurium precursor ratio and tempe...

Embodiment 2

[0037] In this example, lead telluride nanorods were synthesized at a temperature of 120 °C, and the specific steps are as follows:

[0038] 1) Preparation of lead precursor: under nitrogen protection, 89 mg (0.4 mmol) of lead oxide, 170 mg (1 mmol) of trans-2-decenoic acid and 8 g of octadecene were added to a 50 mL three-necked flask , stirred at 120° C. for 1 hour until the solution became clear and transparent, then vacuumized at 110° C. for 1 hour to remove water and oxygen in the three-necked flask to obtain a lead precursor for use;

[0039] 2) Preparation of tellurium precursor: In a nitrogen glove box, add 153 mg (1.2 mmol) of tellurium into a glass bottle containing 1.2 ml of tris(diethylamino)phosphine, stir and dissolve at room temperature until tellurium The elemental substance is completely dissolved in the solution to obtain a tellurium precursor, which is ready for use;

[0040] 3) Reaction at preset lead-tellurium precursor ratio and temperature: 60 μL tellur...

Embodiment 3

[0045] In this example, lead telluride nanorods were synthesized at a temperature of 140 °C, and the specific steps are as follows:

[0046] 1) Preparation of lead precursor: under nitrogen protection, 89 mg (0.4 mmol) of lead oxide, 170 mg (1 mmol) of trans-2-decenoic acid and 8 g of octadecene were added to a 50 mL three-necked flask , stirred at 120° C. for 1 hour until the solution became clear and transparent, then vacuumized at 110° C. for 1 hour to remove water and oxygen in the three-necked flask to obtain a lead precursor for use;

[0047] 2) Preparation of tellurium precursor: In a nitrogen glove box, add 153 mg (1.2 mmol) of tellurium into a glass bottle containing 1.2 ml of tris(diethylamino)phosphine, stir and dissolve at room temperature until tellurium The elemental substance is completely dissolved in the solution to obtain a tellurium precursor, which is ready for use;

[0048] 3) Reaction at preset lead-tellurium precursor ratio and temperature: 60 μL tellur...

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Abstract

The invention discloses a lead telluride nano rod with a uniform size, and a preparation method and applications thereof. According to the preparation method, a short chain organic acid (trans-2-decenoic acid) and lead oxide are combined to form a lead precursor; tri(diethylamino)phosphine and elemental tellurium are combined to form a tellurium precursor; the lead telluride nano rod with a uniform size is synthesized by regulating the reaction temperature and the ratio of the lead precursor to the tellurium precursor and adopting a heat injection method; the diameter of the nano rod is 2-5 nanometers, the length of the nano rod is 10 to 60 nanometers; the electronic belt of the nano rod is anisotropic, and the nano rod has a strong quantum confinement effect. The provided lead telluride nano rod can be well dissolved in an n-hexane solvent and has the advantages of wider application range and user-friendliness. In an ultraviolet visible-near infrared absorption spectrum, the characteristic absorption peaks of the lead telluride nano rod are in a range of 400-550 nm; and the nano rod has special optical properties and thus can be applied to the fields such as solar battery, photoelectric detector, thermoelectric devices, and the like.

Description

technical field [0001] The invention belongs to the technical field of nanometer materials, and relates to a lead telluride nanorod, a preparation method and an application thereof. The provided lead telluride nanorod has uniform size, good solubility and extremely strong quantum confinement effect. Background technique [0002] Lead telluride (PbTe) in narrow-bandgap lead-chalcogenide semiconductor materials has a large Bohr radius (46 nanometers), and electrons in lead telluride are smaller than holes, making their size and shape adjustable The space of lead selenide (PbSe) is larger than that of lead selenide (PbSe), which makes its quantum confinement effect particularly significant. At the same time, it has properties such as high dielectric constant, high thermoelectric figure of merit (ZT), and adjustable energy level. In addition, the unique anisotropic electronic band structure of lead telluride makes it have special photoelectric properties. Therefore, materials s...

Claims

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Application Information

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IPC IPC(8): C01B19/04B82Y40/00
CPCB82Y40/00C01B19/007C01P2002/72C01P2002/84C01P2004/04C01P2004/16
Inventor 马万里韩璐
Owner SUZHOU UNIV
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