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Metal sulfide-coated single-walled carbon nanotube cable and synthetic method thereof

A single-walled carbon nanotube, metal sulfide technology, applied in the direction of zinc sulfide, nanotechnology, nanotechnology, etc., can solve the problems of affecting the intrinsic properties, limited structure, introduction of defects in single-walled carbon nanotubes, etc., to achieve controllable The effect of strong performance and simple process

Active Publication Date: 2016-11-09
SHENYANG INSTITUTE OF CHEMICAL TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Due to the difficult dispersion of single-walled carbon nanotube bundles, which increases the difficulty of preparing nano-cables, the current nano-cable structure with single-walled carbon nanotubes as the core is relatively limited.
In addition, the dispersion of SWNTs usually requires ultrasonic treatment and the addition of surfactants, which will inevitably introduce defects and impurities to SWNTs, thereby affecting their intrinsic properties.

Method used

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  • Metal sulfide-coated single-walled carbon nanotube cable and synthetic method thereof
  • Metal sulfide-coated single-walled carbon nanotube cable and synthetic method thereof
  • Metal sulfide-coated single-walled carbon nanotube cable and synthetic method thereof

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Experimental program
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Effect test

Embodiment 1

[0019] The mixed powder of graphite, 5.0 wt.% catalyst, 2.0 wt.% growth promoter and 0.2 wt.% zinc powder is pressed into a circular tablet, placed in a porcelain boat, and placed in the central constant temperature zone of the chemical vapor deposition furnace . Argon was used as the protective atmosphere and carrier gas with a flow rate of 50 ml / min. The temperature was raised to 1000°C at a rate of 10°C / min, kept for 1 h, and then cooled naturally. The characterization results of the obtained product are as follows figure 1 shown. The length of the nano-cables grown under this preparation condition is several to tens of microns, the diameter is about 120 nm, the number of single-walled carbon nanotubes in the cable core is between 1-5, the outer shell of the cable is continuous, and the cable The outer cladding layer is polycrystalline zinc sulfide.

Embodiment 2

[0021] The mixed powder of graphite, 10.0 wt.% catalyst, 4.0 wt.% growth promoter, 1.0 wt.% silicon powder and 1.0 wt.% zinc powder was pressed into a circular tablet, placed in a porcelain boat, placed The central constant temperature zone of the chemical vapor deposition furnace. Helium was used as the protective atmosphere and carrier gas with a flow rate of 100 ml / min. The temperature was raised to 900°C at a rate of 10°C / min, kept for 0.5 h, and then cooled naturally. The characterization results of the obtained product are as follows figure 2 shown. The length of nanocables grown under this preparation condition is several to tens of microns, and the diameter is about 200 nm. Composed of nanocrystalline grains, the outer coating of the cable is polycrystalline zinc sulfide.

Embodiment 3

[0023] The mixed powder of graphite, 20.0 wt.% catalyst, 8.0 at.% growth promoter, 2.0 wt.% silicon powder and 2.0 wt.% zinc oxide powder was pressed into a circular tablet, placed in a porcelain boat, and placed In the central constant temperature zone of the chemical vapor deposition furnace. Nitrogen was used as the protective atmosphere and carrier gas, and the flow rate was 120 ml / min. The temperature was raised to 1000°C at a rate of 10°C / min, kept for 1.2 h, and then cooled naturally. The characterization results of the obtained product are as follows image 3 shown. The length of the nano-cable grown under this preparation condition is tens of microns, the diameter is about 400 nm, the number of single-walled carbon nanotubes in the core of the cable is between 1-5, the outer layer of the cable is continuous, and the outer layer of the cable is The cladding is polycrystalline zinc sulfide.

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Abstract

The invention relates to a cable and a synthetic method thereof, especially to a metal sulfide-coated single-walled carbon nanotube cable and a synthetic method thereof. The metal sulfide-coated single-walled carbon nanotube cable is prepared in situ by using a chemical vapor deposition (CVD) thermal reaction method. The synthetic method comprises the following steps: compacting graphite, a catalyst, a sulfur-containing growth promoter, silicon powder and metal powder or metal compound powder; with an inert atmosphere as a protective atmosphere and carrier gas, allowing the graphite, the catalyst, the sulfur-containing growth promoter and the silicon powder to undergo a reaction so as to produce a single-walled carbon nanotube; and reacting the sulfur-containing growth promoter with the metal powder or metal compound powder so as to produce a metal sulfide, and allowing the single-walled carbon nanotube and a metal sulfide cluster to depart from the surface of the raw material and to flow to a low-temperature zone, wherein the metal sulfide cluster coats the surface of the single-walled carbon nanotube in the process. The cable has excellent photoelectrochemical characteristics, and the core of the cable is composed of only one or a plurality of the single-walled carbon nanotubes, which facilitates performance of the nanoscale electric effect of the single-walled carbon nanotube and presence of more excellent novel characteristics.

Description

technical field [0001] The invention relates to a cable and a synthesis method thereof, in particular to a metal sulfide-coated single-wall carbon nanotube nano-cable and a synthesis method thereof. Background technique [0002] Single-walled carbon nanotubes have unique electrical properties, which makes them potentially used in nanoelectronics, transparent conductive films, and conductive polymer nanocomposites. Metal sulfides are semiconductors with a wide band gap, and their nanostructures have been widely explored for applications in photocatalysts, photoluminescence and sensors. The nanocable structure with single-walled carbon nanotubes as the core and metal sulfide as the shell can combine the advantages of both, thus exhibiting some novel properties. [0003] Normally, the obtained SWNT samples usually exist in the form of tube bundles. Therefore, in several existing methods for preparing nanocables with SWNTs as cores, the SWNTs are first Dispersion is carried ou...

Claims

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Application Information

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IPC IPC(8): C01B31/02C01G9/08B82Y30/00B82Y40/00
CPCC01G9/08C01P2004/03C01P2004/04C01P2004/62Y02P20/133
Inventor 张艳丽何向明
Owner SHENYANG INSTITUTE OF CHEMICAL TECHNOLOGY
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