A metal sulfide-coated single-wall carbon nanotube nanocable and its synthesis method

A single-walled carbon nanotube, metal sulfide technology, applied in carbon nanotubes, chemical instruments and methods, zinc sulfide, etc., can solve the problems of affecting intrinsic properties, limited structure, introduction of defects in single-walled carbon nanotubes, etc. To achieve the effect of simple process and strong maneuverability

Active Publication Date: 2018-01-16
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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  • A metal sulfide-coated single-wall carbon nanotube nanocable and its synthesis method
  • A metal sulfide-coated single-wall carbon nanotube nanocable and its synthesis method
  • A metal sulfide-coated single-wall carbon nanotube nanocable and its synthesis method

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Experimental program
Comparison scheme
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

A metal sulfide-coated single-walled carbon nanotube nanocable and a synthesis method thereof, relating to a cable and a synthesis method thereof, which are prepared in situ by a chemical vapor deposition (CVD) thermal reaction method; graphite, catalyst, and Sulfur growth promoter, silicon powder, metal powder or metal compound powder are compressed; an inert atmosphere is used as a protective atmosphere and carrier gas, and graphite, catalyst, sulfur-containing growth promoter, and silicon powder are reacted to form single-walled carbon nanotubes; sulfur-containing growth promotion The agent reacts with metal powder or metal compound powder to form metal sulfide, and the single-walled carbon nanotubes and metal sulfide clusters leave the surface of the raw material and flow to the low temperature area; during this process, the metal sulfide clusters are coated on the single-walled carbon nanotubes. tube surface. The cable has excellent photoelectrochemical properties, and the core of the cable is only composed of one or several single-walled carbon nanotubes, which is conducive to the exertion of the nanoscale electrical effect of the single-walled carbon nanotubes, and reflects 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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Patent Type & Authority Patents(China)
IPC IPC(8): C01B32/162C01B32/159C01G9/08B82Y30/00B82Y40/00
CPCC01G9/08C01P2004/03C01P2004/04C01P2004/62Y02P20/133
Inventor 张艳丽何向明
Owner SHENYANG INSTITUTE OF CHEMICAL TECHNOLOGY
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