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Method for producing carbon nanotubes attached to substrate

A technology of carbon nanotubes and nanotubes, which is applied in the field of nanotubes and can solve problems such as the limitation of nanotubes

Active Publication Date: 2020-05-01
ナワテクノロジー
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In practice, however, the length of nanotubes obtainable by this method is limited by the diffusion of gaseous precursors and gaseous by-products: the length does not exceed approximately one millimeter

Method used

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  • Method for producing carbon nanotubes attached to substrate
  • Method for producing carbon nanotubes attached to substrate
  • Method for producing carbon nanotubes attached to substrate

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Embodiment Construction

[0036] The invention has several essential features, and other features which are only optional.

[0037]According to the present invention, the method of chemical vapor deposition, catalyzed by catalyst particles, is used with one or more hydrocarbon compounds acting as carbon precursors (also referred to herein as "carbon sources"). The catalyst particles are deposited on, or formed on, a porous substrate. The catalyst particles are derived from precursor compounds of the catalyst supplied by the first gas stream; this represents the first essential feature of the invention. In an advantageous embodiment, the precursor compounds of the catalyst are introduced into the first gas stream in the form of finely divided liquid particles or solid particles; in other words, the first gas stream contains at least Aerosols during a portion of the journey (also referred to herein as "catalyst aerosols"). The introduction of the catalyst precursor compound in the form of an aerosol co...

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Abstract

A method for preparing carbon nanotubes, nanofibres or nanofilaments by decomposition of at least one carbon precursor in the presence of a catalyst, in which method continuously: a first gas stream comprising a precursor of a catalyst is brought into contact with a porous substrate (43); a second gas stream comprising at least one carbon precursor is brought into contact with the porous substrate(43); the porous substrate (43) is heated to a temperature leading to the deposition of catalyst particles and to the catalytic growth of carbon nanotubes.

Description

technical field [0001] The present invention relates to the field of nanotubes made of carbon, and more particularly to a new method of manufacturing carbon nanotubes by catalytic decomposition of carbon precursor compounds. This synthesis is carried out on a porous substrate through which a gas stream of the catalyst precursor deposited on the substrate is continuously supplied. Background technique [0002] Many methods are known for depositing carbon nanotubes or nanofibers. Most methods proceed through the catalytic decomposition of carbon precursor gases on the substrate. The catalyst can be supplied from the substrate (on which the catalyst is pre-deposited) or from the gas phase. Gradual deactivation of the catalyst usually limits growth. [0003] It is well known to those skilled in the art that the growth of carbon nanotubes on catalytic substrates is limited (see for example: "Carbon Nanotube Synthesis and Growth Mechanism", Chapter 8, by M. Kumar, DOI: 10.5772 / ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/162C01B32/164D01F9/127D01F9/133H01B1/04
CPCD01F9/127D01F9/133C01B32/162C01B32/164C01B32/05C23C16/26
Inventor 帕斯卡尔·布朗热托马斯·瓜拉尔·德蒙萨贝尔
Owner ナワテクノロジー