Undone nitrogen doped carbon nanotubes derivative with good electrochemical performance

A technology of nitrogen-doped carbon and multi-walled carbon nanotubes, which is applied in the field of electrochemistry, can solve the problems of surface area active state limitation and unfavorable applications in the field of electrochemistry, and achieve good conductivity, large specific surface area, and multiple reactive active points. Effect

Inactive Publication Date: 2015-04-22
FUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, despite their good properties, CNTs have an inert and hydrophobic outer wall, resulting in limited surface area and available active states, which are not conducive to their electrochemical applications.

Method used

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  • Undone nitrogen doped carbon nanotubes derivative with good electrochemical performance
  • Undone nitrogen doped carbon nanotubes derivative with good electrochemical performance
  • Undone nitrogen doped carbon nanotubes derivative with good electrochemical performance

Examples

Experimental program
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Effect test

Embodiment 1

[0039] Dissolve 150 mg of nitrogen-doped multi-walled carbon nanotubes (NCNTs) in 36 mL of H 2 SO 4 , stirred moderately for 1 h until the mixture was homogeneous. Then, add 4 mL of 85% H 3 PO 4 And continue to stir for 15 min, slowly add 450 mg of KMnO 4 (It takes about half an hour to add). The mixture was heated to 65°C and kept stirring slowly for 2 h to avoid cutting the oxidized carbon tubes into pieces. After stirring, the mixture was taken out and allowed to stand at room temperature. Add 100 mL of ice water (including 5 mL of 30% hydrogen peroxide) to the mixture, and let it stand for 14 hours to separate the layers. Subsequently, the upper layer solution was poured out, and the solution was filtered with a 0.22 μm microporous aqueous acid-base-resistant (PTFE) filter membrane, and washed twice with 6 mL of 20% HCl during suction filtration. Afterwards, take the filter residue and dissolve it in 60 mL of water. After ultrasonication for 2 minutes, stir slowly u...

Embodiment 2

[0043] Dissolve 150 mg of NCNTs in 36 mL H 2 SO 4 , stirred moderately for 1 h until the mixture was homogeneous. Then, add 7.2 mL of 85% H 3 PO 4 And continue to stir for 15 min, after the mixture is heated to 80 °C, slowly add 750 mg of KMnO 4 , at this time, keep stirring slowly for 2 h to avoid cutting the oxidized carbon tubes into pieces. After stirring, the mixture was taken out and allowed to stand at room temperature. Then, 100 mL of ice water (containing 5 mL of 30% hydrogen peroxide) was added to the mixture, and the solution was allowed to stand to separate layers. Subsequently, the upper layer solution was poured out, and the solution was filtered with a 0.22 μm microporous PTFE filter membrane, and washed twice with 6 mL of 20% HCl during suction filtration. Thereafter, the filter residue was dissolved in 60 mL of water and dispersed evenly with the aid of ultrasound, and then 40 mL of 30% HCl was added to the dispersion. Filtrate with the same PTFE filter...

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Abstract

The invention discloses an undone nitrogen doped carbon nanotubes derivative with good electrochemical performance and a preparation method thereof. Undoing bamboo-like nitrogen doped multi-walled carbon nanotubes along the longitudinal direction is conducted through a solution chemical oxidation method, and the nitrogen doped carbon nanotubes derivative is obtained; through controlling the degree of undoing, caterpillar-shaped nitrogen doped graphene/carbon tube composite materials with heterojunction structures are obtained when undoing is conducted half and nitrogen doped graphene nanobelts are obtained when undoing is completed. The undone carbon nano tube is used for modifying a glassy carbon electrode. It is indicated by the test of electrochemical performance that the materials obtained from the undone nitrogen doped carbon nanotubes derivative with good electrochemical performance have the advantages that the specific surface area is high, more reaction active sites are achieved, and the electron transfer rate is higher, so that the wide application prospects in the field of electrochemistry, such as capacitors, lithium batteries, electro-catalysis, and electrochemical sensors are achieved.

Description

technical field [0001] The invention relates to the field of electrochemistry, in particular to an untied nitrogen-doped carbon nanotube derivative with good electrochemical performance and a preparation method thereof. Background technique [0002] Since the preparation of carbon nanotubes (CNTs) by arc discharge evaporation method, the research on CNTs has attracted extensive attention. CNTs are ordered, hollow cylindrical one-dimensional graphene materials composed of sp2-hybridized carbon atoms. Its unique structural features and excellent properties give it the opportunity to develop into advanced electrode materials. Besides, their abundant electronic properties and remarkable electrical conductivity along their length make them popular in the field of electrochemistry. Among many functionalized CNTs, bamboo-shaped N-doped carbon tubes (NCNTs) are nanomaterials with unique functional properties. Significant electrical conductivity on , through N doping, will lead to...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B41/86C01B31/00
Inventor 詹红兵陈琳冯苗
Owner FUZHOU UNIV
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