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Preparation method for phosphorus-nitrogen doped carbon nanotube

A nitrogen-doped carbon and nanotube technology, applied in the direction of carbon nanotubes, nanocarbons, nanotechnology, etc., can solve problems such as increasing the disorder of the hexagonal carbon frame.

Inactive Publication Date: 2012-10-31
SHANGHAI SECOND POLYTECHNIC UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This difference would greatly increase the disorder within the hexagonal carbon framework, making it difficult for phosphorus to be doped into CNTs

Method used

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  • Preparation method for phosphorus-nitrogen doped carbon nanotube
  • Preparation method for phosphorus-nitrogen doped carbon nanotube
  • Preparation method for phosphorus-nitrogen doped carbon nanotube

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Put 1g Fe / NaY molecular sieve and 0.5g red phosphorus into the ceramic boat, heat the quartz tube furnace to 1073K, then pass the mixed gas of Ar / diethylamine at the flow rate of 20mL / min, keep the temperature for 1h, and cool naturally, that is, A mixture of black phosphorus-nitrogen doped carbon nanotubes and Fe / NaY molecular sieves was obtained by removing Fe / NaY molecular sieves in HF dilute solution to obtain phosphorus-nitrogen doped carbon nanotubes. At this time, the chemical formula of phosphorus-nitrogen doped carbon nanotubes is: CNxPy, x=0.6, y=0.55;

[0022] Results and discussion

[0023] figure 1 .1 is the SEM scanning electron micrograph of the phosphorus-nitrogen doped carbon nanotubes prepared in Example 1. It can be seen from the figure that the phosphorus-nitrogen doped carbon nanotubes prepared by using iron-containing microporous Y-type molecular sieve as a catalyst, diethylamine, and red phosphorus as raw materials grow from the center, like a ...

Embodiment 2

[0035] Put 1g Fe / NaY molecular sieve and 1g red phosphorus into the ceramic boat, heat the quartz tube furnace to 1073K, then pass the mixed gas of Ar / diethylamine at a flow rate of 20mL / min, keep the temperature for 1h, and cool naturally to obtain black The mixture of phosphorus-nitrogen doped carbon nanotubes and Fe / NaY molecular sieves is obtained by removing Fe / NaY molecular sieves in HF dilute solution to obtain phosphorus-nitrogen doped carbon nanotubes. The chemical formula of phosphorus-nitrogen doped carbon nanotubes at this time is: CNxPy, x=0.6, y=0.65; it can be seen that under the same conditions, the more red phosphorus there is, the higher the phosphorus content of the obtained product is.

Embodiment 3

[0037] Put 1g Fe / NaY molecular sieve and 0.5g red phosphorus into the porcelain boat, heat the quartz tube furnace to 1073K, then pass the mixed gas of Ar / diethylamine at the flow rate of 30mL / min, keep the temperature for 1h, and cool naturally, that is, A mixture of black phosphorus-nitrogen doped carbon nanotubes and Fe / NaY molecular sieves was obtained by removing Fe / NaY molecular sieves in HF dilute solution to obtain phosphorus-nitrogen doped carbon nanotubes. The chemical formula of phosphorus-nitrogen doped carbon nanotubes at this time is: CNxPy, x=0.6, y=0.6; It can be seen that under the same conditions, the faster the flow rate of the Ar / diethylamine mixed gas is, the higher the phosphorus content of the resulting product will be. high.

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Abstract

The invention relates to a preparation method for a phosphorus-nitrogen doped carbon nanotube. The method comprises the following steps: 1) putting a Fe / Y catalyst and red phosphorus into a ceramic boat, heating a quartz tube type furnace to 900 to 1,100 K, introducing Ar / diethylamine mixed gas, maintaining the constant temperature for 0.5 to 1.51 hours and naturally cooling to obtain a mixture of the black phosphorus-nitrogen doped carbon nanotube and the Fe / Y catalyst, wherein the chemical formula of the phosphorus-nitrogen doped carbon nanotube is CNxPy; x is more than 0.5 and less than 1; and y is more than 0.5 and less than 1; and 2) removing a Fe / NaY molecular sieve from dilute solution of HF to obtain the phosphorus-nitrogen doped carbon nanotube. The phosphorus-nitrogen is doped, so that light transition absorption and heat conductivity coefficient of a single-wall carbon nanotube can be obviously changed. The research on the density functional theory of the phosphorus-nitrogen doped single-wall carbon nanotube shows that the phosphorus is replaced to serve as a scattering center, so that local electronic state electron can be established and the transportation characteristic of the single-wall carbon nanotube is modified. In addition, the phosphorus-nitrogen is doped, so the mechanical strength of the single-wall carbon nanotube is changed, and the breaking elongation is reduced by 50 percent.

Description

technical field [0001] The present invention relates to a kind of carbon nanotube, more specifically, relate to a kind of preparation method of phosphorus-nitrogen doped carbon nanotube Background technique [0002] The new one-dimensional material carbon nanotubes and its related doped nanotubes are not only the research objects of basic science but also have potential application prospects. Now, various nanotubes can be prepared not only by arc discharge method, but also by catalytic pyrolysis method, as well as laser evaporation graphite method, organic gas plasma decomposition method and so on. Due to the excellent properties of carbon nanotubes, it is a problem that must be solved at present to prepare a large number of carbon nanotubes for research and application. [0003] In addition to nitrogen and boron, two elements that have been intensively studied in doping carbon nanotubes, phosphorus is another element used to modify the structure and properties of carbon na...

Claims

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Application Information

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IPC IPC(8): C01B31/02B82Y30/00B82Y40/00C01B32/16
Inventor 陈钦王利军
Owner SHANGHAI SECOND POLYTECHNIC UNIVERSITY
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