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Core shell structure composite fiber based on carbon nano tube and preparation method and application thereof

A technology of carbon nanotube fibers and composite fibers, which is applied in the fields of fiber chemical characteristics, textiles and papermaking, and material electrochemical variables. Sensitivity, the effect of high sensitivity

Active Publication Date: 2012-04-11
JIANGSU ZJA NEW MATERIAL
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Problems solved by technology

[1，2] At present, the widely used oxygen reduction electrode is platinum carbon or platinum alloy, but the high cost of the rare metal platinum greatly limits its large-scale application. In addition, platinum-based electrodes are prone to strong adsorption of carbon monoxide produced by methanol oxidation. catalyst poisoning

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  • Core shell structure composite fiber based on carbon nano tube and preparation method and application thereof
  • Core shell structure composite fiber based on carbon nano tube and preparation method and application thereof
  • Core shell structure composite fiber based on carbon nano tube and preparation method and application thereof

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[0048] like Figure 7 Shown is a schematic diagram of the growth of nitrogen-doped carbon nanotubes on pure carbon nanotube fibers. First, FeCl 3 It is coated on the carbon nanotube fiber by soaking the carbon nanotube fiber in 0.1mol FeCl 3 aqueous solution, and then evaporate the water to achieve. The synthesized fibers were mounted on ceramic boats in a tube furnace in which a mixture of argon (560 ± 10 sccm) and hydrogen (35 ± 5 sccm) was used as the gas phase carrier. Detailed temperature changes during the growth process such as Figure 8 shown. All in all, the furnace temperature rises from room temperature to 900±10°C in about 20 to 25 minutes under the gas phase carrier and then stabilizes at 900±10°C for about 40 to 60 minutes. 3 reduced to Fe. Then, ethylenediamine is introduced into the furnace as a carbon source and a nitrogen source to grow nitrogen-doped carbon nanotubes for 5-30 minutes. After the experiment, the ethylenediamine was turned off and the furn...

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Abstract

The invention belongs to the technical field of micro devices, and particularly relates to a core shell structure composite fiber based on a carbon nano tube and a preparation method and application thereof. In the invention, the flexible composite fiber material with a core shell structure is obtained by in-situ growing of a netlike nitrogen-doped carbon nano tube on the surface of an oriented carbon nano tube; and the composite fiber shows excellent oxygen reduction performance by combining perfect three-dimensional jump electrical conductivity of the carbon nano tube and good electrocatalysis performance of the nitrogen-doped carbon nano tube. The current density of oxygen reduction of a micro electrode made from the composite fiber material is 5 times that of a platinum wire electrodeunder the same conditions. The carbon nano tube composite fiber electrode also has a remarkably high sensitivity (up to 1.0 muAmM<-1>) to the trace detection of H2O2. Moreover, the composite fiber has low preparation cost and high efficiency, can be industrially amplified more easily to solve problems in practical application, and has a wide application prospect when being used as a novel electrode material widely applied to photoelectric devices.

Description

technical field [0001] The invention belongs to the technical field of micro-device materials, and in particular relates to a core-shell structure carbon nanotube composite fiber material and a preparation method thereof, and electrochemical reduction of oxygen and H 2 o 2 detection sensor applications. Background technique [0002] High-efficiency catalysts are very important for the oxygen reduction reaction in fuel cells, and the oxygen reduction reaction is an important part of high-performance fuel cells. [1，2] At present, the widely used oxygen reduction electrode is platinum carbon or platinum alloy, but the high cost of the rare metal platinum greatly limits its large-scale application. In addition, platinum-based electrodes are prone to strong adsorption of carbon monoxide produced by methanol oxidation. Catalyst poisoning. Nitrogen-doped carbon nanotubes have excellent performance in oxygen reduction catalysis due to their unique structure, and have unique advan...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F11/12D01F9/127G01N27/30
Inventor 彭慧胜陈涛蔡振波仰志斌李立孙雪梅
Owner JIANGSU ZJA NEW MATERIAL
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