Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Method for preparing lead telluride nano-wire

A lead telluride nanometer and nanowire technology is applied in the field of semiconductor thermoelectric nanomaterial preparation, which can solve the problems of low yield, inability to be suitable for industrial production, nanowire damage, affecting the thermoelectric performance of materials, etc., and achieves low cost, uniform size, and synthesis. low temperature effect

Inactive Publication Date: 2008-07-23
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
View PDF0 Cites 10 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The existing method for preparing thermoelectric nanowires is mainly the alumina template method. Although nanowire materials with uniform size and controllable length can be obtained by using this method, the yield is too low to be suitable for industrial production, and each time it is removed from the template. Nanowires will be damaged due to the use of strong acid when removing them
And usually the generated nanowires are polycrystalline, which seriously affects the thermoelectric properties of the material

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method for preparing lead telluride nano-wire

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] 1. Raw materials: analytically pure Pb(NO 3 ) 2 , Na 2 TeO 3 .

[0020] 2. Add 0.1808 g of Na 2 TeO 3 Put 0.3 g of PVP (K30, MW=40000) in a 50 ml autoclave, add 25 ml of double distilled water and stir to make it clear.

[0021] 3. Add 1.5 ml of hydrazine hydrate and 3 ml of ammonia water dropwise to the above solution, and continue stirring to make it clear.

[0022] 4. Add 10.5ml of twice-distilled water, seal the autoclave and place it in an oven at 180°C for 24 hours, then take it out and allow it to cool naturally to room temperature.

[0023] 5. In the above reaction solution, add 0.268 grams of Pb (NO 3 ) 2 , stirred at 5°C for 12 hours and then placed in an oven at 100°C for 12 hours. Acetone was added to the reacted system to deposit a black suspension, washed repeatedly with twice distilled water and ethanol, and dried at 80° C. for 12 hours to obtain the target product.

[0024] The FESEM photo of the prepared PbTe nanowires is shown in Figure 1. Fr...

Embodiment 2

[0026] 1. Raw materials: analytically pure Pb(NO 3 ) 2 , Na 2 TeO 3 .

[0027] 2. Add 0.3616 g of Na 2 TeO 3 Put 0.6 g of PVP (K30, MW=40000) in a 100 ml autoclave, add 50 ml of double distilled water and stir to make it clear.

[0028] 3. Add 3 ml of hydrazine hydrate and 6 ml of ammonia water dropwise to the above solution, and continue to stir to make it clear.

[0029] 4. Add 21ml of double-distilled water, seal the autoclave and place it in an oven at 180°C for 24 hours, then take it out and let it cool down to room temperature naturally.

[0030] 5. In the above reaction solution, add 0.536 grams of Pb (NO 3 ) 2 , stirred at 5°C for 12 hours and then placed in an oven at 100°C for 12 hours. Acetone was added to the reacted system to deposit a black suspension, washed repeatedly with double distilled water and ethanol, and dried at 60°C for 12 hours to obtain the target product.

[0031] The obtained result is close to the obtained result of Example 1.

Embodiment 3

[0033] 1. Raw materials: analytically pure Pb(NO 3 ) 2 , Na 2 TeO 3 .

[0034] 2. Add 0.1085 g of Na 2 TeO 3 Put 0.18 g of PVP (K30, MW=40000) in a 30 ml autoclave, add 15 ml of double distilled water and stir to make it clear.

[0035] 3. Add 0.9 ml of hydrazine hydrate and 1.8 ml of ammonia water dropwise to the above solution, and continue stirring to make it clear.

[0036] 4. Add 6.3ml of twice distilled water, seal the autoclave and place it in an oven at 180°C for 24 hours, then take it out and let it cool down to room temperature naturally.

[0037] 5. In the above reaction solution, add 0.161 grams of Pb (NO 3 ) 2 , stirred at 5°C for 12 hours and then placed in an oven at 100°C for 12 hours. Acetone was added to the reacted system to deposit a black suspension, washed repeatedly with double distilled water and ethanol, and dried at 60°C for 12 hours to obtain the target product.

[0038]The obtained result is close to the obtained result of Example 1.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
The average diameteraaaaaaaaaa
Login to View More

Abstract

The invention relates to a preparation method of a lead telluride nano-wire, belonging to the technical field of thermoelectric semiconductor materials, which comprises the following steps: first, prepare a Te nano-wire with the diameter of 3-20 nanometers; second, add Pb (NO3)2 with the same molar ratio with Na2TeO3 to the solution of Te nano-wire, seal in an autoclave at 90-100 DEG C to react for 9-12 hours, and get PbTe nano-wire with uniform diameter and the length of 1 micron to 100 microns. The preparation method of a lead telluride nano-wire has the advantages that: PbTe nano-wire with uniform diameter and average length smaller than the exciton Bohr radius can be produced through controlling the growth temperature, the lead salt concentration and the reaction time; the PbTe nano-wire prepared with the method can be used as an ideal scientific research material, laying good basis for preparing and realizing thermoelectric nanometer devices in the future.

Description

technical field [0001] The invention relates to a method for preparing a semiconductor thermoelectric nanometer material. Specifically, it is about the preparation method of one-dimensional thermoelectric lead telluride nanowires. Background technique [0002] In 1823, Thomas Seebeck discovered the thermoelectric effect for the first time, thus human beings began to apply thermoelectric materials. Thermoelectric materials are functional materials that can convert heat and electricity into each other. It offers great prospects for manufacturing pollution-free, noise-free, mechanical-movement-free, wear-free, high-efficiency power generation and refrigeration equipment. It is widely used in remote control navigation systems, thermoelectric refrigerators, pyroelectric infrared detectors, and superconducting electronic instruments, and has potential important application value in industrial waste heat waste heat power generation. Especially in recent years, with the increasin...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): C30B29/46C30B29/62
Inventor 郭万林台国安
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com