Preparation method for carbon nanotube-coated thermoelectric nanometer capsule

A technology of carbon nanotubes and nanocapsules, which is applied in the field of preparation of thermoelectric nanocapsules, can solve problems such as lack of thermoelectric materials, achieve rapid response, simple process flow, and improve thermoelectric performance

Inactive Publication Date: 2016-09-21
SHANGHAI DIANJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But so far there is no report on the application in the field of thermoelectric materials

Method used

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  • Preparation method for carbon nanotube-coated thermoelectric nanometer capsule

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] 1) Ultrasonic dispersion of 0.024 g of functionalized carbon nanotubes in ethylene glycol was transferred to a 100 ml three-neck round bottom flask, and the pH was adjusted to 12. The functionalization method of carbon nanotubes is: heat the carbon nanotubes in concentrated nitric acid to 120°C, oxidize, purify, wash with deionized water until neutral, remove impurities, and then ultrasonically disperse the carbon nanotubes in concentrated ammonia water 2h, after washing again to neutrality, placed in a concentrated solution of EDTA and ultrasonically oscillated for 2h to complete the functionalization treatment.

[0022] 2) Weigh a certain amount of Bi(NO 3 ) 3 ·5H 2 O, dissolved in ethylene glycol and heated to make a 10mmol / l solution.

[0023] 3) Weigh a certain amount of Na 2 TeO 3 , dissolved in ethylene glycol, and heated to make a 20mmol / l solution.

[0024] 4) According to Bi 2 Te 3 The determined Bi:Te molar ratio of chemical composition is 2:3, the Bi...

Embodiment 2

[0028] 1) Ultrasonic dispersion of 0.063 g of functionalized carbon nanotubes in ethylene glycol was transferred to a 100 ml three-neck round bottom flask, and the pH was adjusted to 13. The functionalization method of carbon nanotubes is: heat the carbon nanotubes in concentrated nitric acid to 120°C, oxidize, purify, wash with deionized water until neutral, remove impurities, and then ultrasonically disperse the carbon nanotubes in concentrated ammonia water 2h, after washing again to neutrality, placed in a concentrated solution of EDTA and ultrasonically oscillated for 2h to complete the functionalization treatment.

[0029] 2) Weigh a certain amount of SbCl 3 , Dissolved in ethylene glycol, and heated to make a 10mmol / l solution.

[0030] 3) Weigh a certain amount of Na 2 TeO 3 , dissolved in ethylene glycol, and heated to make a 20mmol / l solution.

[0031] 4) According to Sb 2 Te 3 The molar ratio of Sb:Te determined by chemical composition is 2:3, the SbCl of 20.0...

Embodiment 3

[0035] 1) Ultrasonic dispersion of 0.144 g of functionalized carbon nanotubes in ethylene glycol was transferred to a 100 ml three-neck round bottom flask, and the pH was adjusted to 14. The functionalization method of carbon nanotubes is: heat the carbon nanotubes in concentrated nitric acid to 120°C, oxidize, purify, wash with deionized water until neutral, remove impurities, and then ultrasonically disperse the carbon nanotubes in concentrated ammonia water 2h, after washing again to neutrality, placed in a concentrated solution of EDTA and ultrasonically oscillated for 2h to complete the functionalization treatment.

[0036] 2) Weigh a certain amount of SbCl 3 , Dissolved in ethylene glycol, and heated to make a 10mmol / l solution.

[0037] 3) Weigh a certain amount of Se powder, dissolve it in ethylene glycol, and heat it to make a 20mmol / l solution.

[0038] 4) According to Sb 2 Se 3 The molar ratio of Sb:Se determined by chemical composition is 2:3, the SbCl of 20.0ml ...

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Abstract

The invention provides a preparation method for a carbon nanotube-coated thermoelectric nanometer capsule. The preparation method comprises the following steps: 1) dispersing functionalized multi-walled carbon nanotubes in a solvent and adjusting a pH value to 10 to 14; 2) dissolving a compound containing elemental Sb or Bi in a solvent; 3) dissolving a compound containing elemental Se or Te or elemental Se or Te in a solvent; 4) uniformly mixing a mixed solution obtained in the step 2) with a mixed solution obtained in the step 3) according to a stoichiometric ratio; and 5) adding a mixed solution obtained in the step 4) into a solution obtained in the step 1) step by step according to a mass ratio of the functionalized multi-walled carbon nanotubes to the product in the step 4) of 0.3: 1 to 3: 1, carrying out a reaction at 185 DEG C for 0.5 to 2 h, and then carrying out treatment so as to obtain the carbon nanotube-coated thermoelectric nanometer capsule. The preparation method is simple in process flow and rapid in synthesis; and the prepared carbon nanotube-coated thermoelectric nanometer capsule is extensively applicable to development of micro-nano devices and nano-materials and research in subject areas like mechanics, electromagnetism, catalysis and heat transport.

Description

technical field [0001] The invention relates to a method for preparing thermoelectric nanocapsules, in particular to a method for preparing carbon nanotube-coated thermoelectric nanocapsules. Background technique [0002] Thermoelectric materials (thermoelectric materials) can realize direct mutual conversion between heat energy and electric energy, and its devices have outstanding advantages such as small size, no noise, no pollution, no moving parts, and maintenance-free. The development and promotion of thermoelectric refrigeration and thermoelectric power generation technologies are of great value to energy utilization, economic development and environmental protection in my country and the world. By Bi 2 Te 3 The V-VI main group alloys represented by compounds are the earliest thermoelectric materials studied, and most of the commercial room temperature cooling elements currently use such materials. [0003] Carbon nanotubes have microstructure characteristics such a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J13/04C01B31/02B82Y30/00B82Y40/00
CPCB01J13/043B82Y30/00B82Y40/00C01P2002/72C01P2004/04C01P2004/64
Inventor 周丽娜
Owner SHANGHAI DIANJI UNIV
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