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Preparation of carbon nano fiber composite material coated by nitrogen-doped carbon nanotube and application thereof

A carbon nanofiber and nitrogen-doped carbon technology, which is applied in the analysis of materials, fiber chemical characteristics, and material analysis through electromagnetic means, can solve problems such as easy damage to three-dimensional structures, and achieve strong controllability, simple preparation methods, The effect of easy operation

Inactive Publication Date: 2015-08-19
JIANGXI NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, transferring 3D nitrogen-doped carbon nanotubes from a semiconductor to an electrode is a rather complicated process, and it is easy to destroy its original 3D structure

Method used

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  • Preparation of carbon nano fiber composite material coated by nitrogen-doped carbon nanotube and application thereof
  • Preparation of carbon nano fiber composite material coated by nitrogen-doped carbon nanotube and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Dissolve 6 wt.% polyacrylonitrile and 10 wt.% iron acetylacetonate in dimethylformamide solution, and electrospin the above mixed solution for 0.5 h. The electric field strength of electrospinning is 60kV / m. The distance between the spinneret and the collecting plate was 30 cm, and the polyacrylonitrile composite fiber membrane containing metallic iron was obtained, and the obtained composite fiber membrane was annealed at 230°C for 3 h to obtain the oxidized composite fiber; the above-mentioned oxidized composite fiber was The temperature was raised to 850 °C at a rate of 5 °C / min and maintained for 1 h to obtain a carbon nanofiber composite material loaded with iron nanoparticles; the above carbon nanofiber composite material was used as a carbon substrate, and the flow rate of argon gas was adjusted to 150 sccm, and the Inject hydrogen, and adjust its flow rate to 50 sccm, use pyridine as the nitrogen source and carbon source, inject pyridine for 30 min, and after the...

Embodiment 2

[0026] The nitrogen-doped carbon nanotube carbon nanofiber composite material prepared in Example 1 was cut into a circular film with a diameter of 3 mm and directly attached to the surface of the glassy carbon electrode (Φ=3 mm), and 4 mu L absolute ethanol on the surface of the composite film, and dried at room temperature to obtain a nitrogen-doped carbon nanotube carbon nanofiber composite modified glassy carbon electrode. Glucose oxidase was dissolved in 0.1M phosphate buffer solution (pH7.4) to make an 8 mg / mL enzyme solution, and 5 mu L was added dropwise on the modified glassy carbon electrode, and after drying, 5 mu L 0.5 wt.% Nafion solution was placed in a refrigerator at 4 °C to dry to obtain a glucose oxidase electrode. The enzyme electrode is used for the detection of glucose, and has a fast and sensitive response, and can reach a steady-state current within 5 s (see figure 2 ), the lowest detection limit is 0.2 mu

[0027] mol / L, the linear range is 0.5 mu...

Embodiment 3

[0029] Dissolve 6 wt.% polyacrylonitrile and 10 wt.% iron acetylacetonate in dimethylformamide solution, and electrospin the above mixed solution for 1 h. The electric field strength of electrospinning is 70kV / m. The distance between the spinneret and the collecting plate was 40 cm, and the polyacrylonitrile composite fiber membrane containing metallic iron was obtained, and the obtained composite fiber membrane was annealed at 230 °C for 3 h to obtain the oxidized composite fiber; the above oxidized composite fiber was heated in an argon atmosphere The temperature was increased to 800 °C at a rate of 5 °C / min and maintained for 1 h to obtain a carbon nanofiber composite material loaded with iron nanoparticles; the carbon nanofiber composite material obtained above was used as a carbon substrate, and the flow rate of argon gas was adjusted to 150 sccm , filled with hydrogen, and adjusted its flow rate to 50 sccm, using diethylamine as nitrogen source and carbon source, injected...

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Abstract

The invention relates to a preparation of a carbon nano fiber composite material coated by nitrogen-doped carbon nanotube and an application thereof. The preparation method is characterized in that an electrospinning technology and a heat treatment technology are combined to prepare the metal nanoparticles-loaded carbon nano fiber composite material; the carbon nano fiber composite material is taken as a carbon substrate, Based on the advantages of large specific surface area, good conductivity and biocompatibility of three dimensional nitrogen-doped carbon nanotube nano structure, the composite material can be directly used as an electrode material for high-loading capacity and high activity loading of glucose oxidase, and glucose oxidase electrode with high sensitivity can be constructed.

Description

Technical field [0001] The present invention involves the preparation and application of a nitrogen doped carbon nanoma carbon nanofiber composite material. Background technique [0002] At present, with the improvement of people's living standards, the incidence of diabetes is on the rise.The measurement of glucose content in human blood can be used to reveal the severity of diabetes and monitor blood glucose levels.Therefore, it is of great significance to develop the method of rapid, simple, and sensitively detecting low concentration of glucose. [0003] In recent years, the vast majority of glucose biosensors are prepared by the method of solid -loading glucose oxidase on the electrode surface, with a view to obtain high sensitivity and high -selective sensors.The high activity and high load of glucose oxidase are one of the key steps for building glucose sensors.For a long time, people have been working hard to explore various new biological solid load materials.Carbon nano...

Claims

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Application Information

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IPC IPC(8): D01F11/14D01F9/22D01F1/10G01N27/327
Inventor 侯豪情郭乔辉张满
Owner JIANGXI NORMAL UNIVERSITY
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