Single-walled carbon nanotube packaged super-long linear carbon chain and preparation method thereof

A technology of single-walled carbon nanotubes and linear carbon, which is applied in the direction of carbon nanotubes, nanocarbons, chemical instruments and methods, etc., can solve the problems that the large-scale preparation of single-walled carbon nanowire samples has not yet been realized, and achieve easy realization and adjustable length Tune and perfect the effect of the kind

Pending Publication Date: 2021-10-29
SHANGHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

So far, multi-wall carbon nanowires and double-wall carbon nanowires have been prepared by various methods, only single-wall carbon nanotubes coated with ultra-long carbon chains, that is, mass preparation of single-wall carbon nanowire samples has not yet been realized

Method used

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  • Single-walled carbon nanotube packaged super-long linear carbon chain and preparation method thereof
  • Single-walled carbon nanotube packaged super-long linear carbon chain and preparation method thereof
  • Single-walled carbon nanotube packaged super-long linear carbon chain and preparation method thereof

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Embodiment 1

[0036] In this embodiment, a method for preparing a single-walled carbon nanotube-encapsulated ultra-long linear carbon chain is characterized in that it comprises the following steps:

[0037] a. Preparation of open single-walled carbon nanotubes:

[0038] Single-walled carbon nanotubes with a diameter of 0.6-1.3nm are obtained by chemical vapor deposition, arc method or laser ablation method, and the single-walled carbon nanotubes are placed in a hydrogen-containing mixed gas with a hydrogen-argon volume ratio of 1:2. Heating the single-walled carbon nanotubes to 400-1000°C, or heating the single-walled carbon nanotubes to 200-800°C in dry air, and performing opening treatment to obtain open single-walled carbon nanotubes; using the carbon nanotube port The stability of the five-membered ring and the six-membered ring of the tube wall are different;

[0039] b. Short carbon chain preparation:

[0040] Using the liquid phase arc method, using at least one of methanol, n-hex...

Embodiment 2

[0048] This embodiment is basically the same as Embodiment 1, especially in that:

[0049] In this embodiment, in the step a, the opening treatment is carried out in dry air; the hydrogen-containing mixed gas contains at least one gas of nitrogen, argon, helium, neon and hydrogen, and hydrogen nitrogen, hydrogen helium or Hydrogen-containing mixed gas of hydrogen and neon;

[0050] In this embodiment, in the step b, the laser ablation method is used to prepare a shorter linear carbon chain molecule C n h 2 , wherein n is the number of carbon atoms, and the value of n is 6 to 40 to obtain a short carbon chain.

[0051] This embodiment adopts different experimental conditions from the first embodiment to achieve high-efficiency preparation of ultra-long linear carbon chains coated with high-purity single-walled carbon nanotubes, and improves the types of carbon nanowires.

[0052] The preparation method of the single-walled carbon nanotube coated one-dimensional ultra-long li...

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Abstract

The invention discloses a single-walled carbon nanotube packaged super-long linear carbon chain and a preparation method thereof. A single-walled carbon nanotube coated one-dimensional super-long linear carbon chain product can be prepared. According to the method, a short carbon chain CnH2 (polyyne) with sp orbit hybrid bonds is packaged in an open single-walled carbon nanotube (SWCNT) in the diameter of 0.6-1.3 nm, and then heat treatment is carried out in an inert gas or high-vacuum environment , and a fusion reaction of a short carbon chain in a confinement space of a single-walled carbon nanotube is utilized to generate an ultra-long linear carbon chain (LLCC), so that the ultra-long linear carbon chain coated with the single-walled carbon nanotube is obtained. The method serves as an effective means for efficiently preparing high-purity single-walled carbon nanotube coated super-long linear carbon chains (LLCC@SWCNT, single-walled carbon nanowires), fills up the blank of single-walled carbon nanowire samples all the time, and provides experimental material guarantee for foundation and application research of sp-based carbon nanomaterials.

Description

technical field [0001] The invention relates to a preparation method for encapsulating ultra-long linear carbon chains with small-diameter single-wall carbon nanotubes. Among them, the diameter of single-walled carbon nanotubes is 0.6-1.3 nm, and the number of carbon atoms in the ultra-long linear carbon chain is 50 to tens of thousands. Background technique [0002] It is now known that there are 3 kinds of electronic orbital hybridization into bonds in carbon elements in nature, namely sp, sp 2 and sp 3 Orbital hybridization into bonds. by sp 2 and sp 3 Graphite and diamond composed of orbital hybridization into bonds are well known, but substances composed entirely of sp orbital hybridization into bonds have not been found in nature. In recent years, with the in-depth study of carbon materials, the research on sp carbon materials has gradually become a research hotspot. People call the substance composed of sp orbitals hybridized into bonds to be called Carbyne (Carb...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/168C01B32/159C01B32/178C01B32/15
CPCC01B32/178C01B32/168C01B32/159C01B32/15C01B2202/36
Inventor 赵新洛刘轶畅伟伟李倩倩朱天翔房良刘馥刘一幡
Owner SHANGHAI UNIV
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