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Preparation method and application of nitrogen and sulfur co-doped carbon nanotubes

A nitrogen-sulfur co-doping, carbon nanotube technology, applied in nanotechnology, nanotechnology, nanotechnology for materials and surface science, etc. problems such as low efficiency, to achieve the effect of improving electrochemical performance, low cost, and large specific surface area

Active Publication Date: 2020-10-09
CHANGZHOU UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] In order to solve the deficiencies in the prior art of preparing nitrogen-sulfur co-doped nanomaterials with complex process, harsh conditions, and low production efficiency, the present invention provides a simple and feasible method for preparing nitrogen-sulfur co-doped carbon nanotubes, and utilizes Angstrom The catalytic oxygen reduction performance of nitrogen-sulfur co-doped carbon nanotubes prepared by Luoshi's own advantages as a template is greatly improved

Method used

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  • Preparation method and application of nitrogen and sulfur co-doped carbon nanotubes
  • Preparation method and application of nitrogen and sulfur co-doped carbon nanotubes
  • Preparation method and application of nitrogen and sulfur co-doped carbon nanotubes

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preparation example Construction

[0023] The preparation process of the nitrogen-sulfur co-doped carbon nanotube of the present invention is specifically as follows:

[0024] (1) Modified halloysite: disperse pure halloysite in 0.1-0.5 mol / L hydrochloric acid, and continue mechanical stirring for 8-24 hours to obtain acidified modified halloysite.

[0025] (2) Synthesis of halloysite / polythiophene composite material: Dissolve modified halloysite and thiophene in an organic solvent at the same time (the mass ratio of thiophene monomer to halloysite is 0.5-2:1; halloysite and organic solvent Mass ratio of 0.05~0.15:1), keep magnetic stirring for 20~40min, then add oxidant anhydrous ferric chloride to the system (mass ratio of anhydrous ferric chloride to thiophene is 3~5:1), 0 Continue to stir and react at ~5°C for 6-12 hours, filter, wash with absolute ethanol, and dry to obtain the halloysite / thiophene composite material;

[0026] (3) Synthesis of halloysite / polythiophene / polypyrrole composite material: Mix a...

Embodiment 1

[0033] (1) Modified halloysite: disperse pure halloysite in 0.2 mol / L hydrochloric acid, and continue mechanical stirring for 16 hours to obtain acidified modified halloysite.

[0034](2) Synthesis of halloysite / polythiophene composite material: 3 g of modified halloysite and 0.5 g of thiophene were simultaneously dissolved in 20 mL of chloroform (the mass ratio of thiophene monomer to halloysite was 0.5:1; halloysite and organic The mass ratio of the solvent is 0.15:1), keep magnetic stirring for 20min, then add 2g oxidant anhydrous ferric chloride to the system (the mass ratio of anhydrous ferric chloride to thiophene is 4:1), and continue stirring at 5°C React for 12 hours, filter, wash with absolute ethanol, and dry to obtain the halloysite / polythiophene composite material;

[0035] (3) Synthesis of halloysite / polythiophene / polypyrrole composite material: Mix 1 g of the composite material in (2) with 20 mL of deionized water (the mass ratio of composite material to deioniz...

Embodiment 2

[0039] (1) Modified halloysite: disperse pure halloysite in 0.1 mol / L hydrochloric acid, and continue mechanical stirring for 12 hours to obtain acidified modified halloysite.

[0040] (2) Synthesis of halloysite / polythiophene composite material: 3g modified halloysite and 3g thiophene were simultaneously dissolved in 60mL toluene (the mass ratio of thiophene monomer to halloysite was 1:1; halloysite and organic solvent The mass ratio of ferric chloride to thiophene is 0.05:1), keep magnetic stirring for 30min, then add 9g oxidant anhydrous ferric chloride to the system (the mass ratio of anhydrous ferric chloride to thiophene is 3:1), and continue to stir the reaction at 0°C 9h, filter, wash with absolute ethanol, and dry to obtain the halloysite / polythiophene composite material;

[0041] (3) Synthesis of halloysite / polythiophene / polypyrrole composite material: Mix 1 g of the composite material in (2) with 12.5 mL of deionized water (mass ratio of composite material to deioni...

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Abstract

The invention relates to a method of controllably preparing a nitrogen-sulfur co-doped carbon nanotube by taking halloysite as a template, and belongs to the scientific and technical field of batterymaterials. The method includes taking the halloysite, thiophene and pyrrole as raw materials, performing low-temperature polymerization on the halloysite and the thiophene to obtain a halloysite / thiophene composite material, mixing the halloysite / thiophene composite material with the pyrrole to obtain halloysite / conducting polymer composite material, performing high-temperature treatment on the composite material, and removing the halloysite to obtain the nitrogen-sulfur co-doped carbon nanotube. The invention further provides application of the nitrogen-sulfur co-doped carbon nanotube obtained by the preparation method. The nitrogen-sulfur co-doped carbon nanotube is applied to fuel cell catalysis on negative-electrode oxygen reduction reactions.

Description

technical field [0001] The invention relates to a method for controllably preparing nitrogen-sulfur co-doped carbon nanotubes by using halloysite as a template, belonging to the technical field of battery materials. Background technique [0002] Fuel cell technology is a leader in new energy technologies, but because of its slow cathode oxygen reduction reaction (ORR), a large number of catalysts are required to catalyze it. For many years, platinum (Pt)-based catalysts have been considered as the best choice for oxygen reduction catalysts, but platinum-based catalysts generally have high cost and poor stability. In recent years, metal-free carbon-based catalysts have been considered as possible alternatives to Pt-based catalysts due to their active oxygen reduction sites, low cost, and good stability. [0003] Carbon nanotubes as a sp 2 Carbon materials with a hybrid structure have a good structural foundation in terms of mechanics and thermodynamics, and have extremely e...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/90H01M4/96B82Y30/00
CPCB82Y30/00H01M4/9091H01M4/96Y02E60/50
Inventor 刘文杰汝钱洵左士祥姚超杜涛王亮李霞章罗士平
Owner CHANGZHOU UNIV
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