Experimental device and method for researching growth of carbon nanotube

Abstract

The invention discloses an experimental device and method for researching the growth of a carbon nanotube, belonging to the field of preparation of carbon nanotubes. The experimental device comprisesa combustor, a catalyst base plate, an air cylinder and a temperature measuring device, wherein the combustor is used for generating laminar flame; the catalyst base plate is mounted on a piston rod of the air cylinder and can do a reciprocating motion on flame; an air inlet pipeline and an air outlet pipeline of the air cylinder are connected through a bidirectional electromagnetic valve and a nitrogen bottle and are used for controlling the piston rod to move; and the temperature measuring device is used for detecting the temperature of the flame and displaying the temperature in real time and controlling a valve element of a bidirectional electromagnetic valve to work by virtue of a signal generator. According to the experimental device, the motion of the catalyst base plate is controlled by virtue of a cavity, and the time can be accurately controlled at a millisecond level during the collection of the carbon nanotube, so that the carbon nanotube can be sampled and collected in theformation process, and foundation is provided for the research of the growth mechanism.

Description

technical field [0001] The invention relates to the technical field of carbon nanotube preparation, and more specifically relates to an experimental device and method for studying the growth of carbon nanotubes. Background technique [0002] Nanomaterials are a new generation of materials at the nanometer level. They have a variety of unique properties and exhibit specific physical and chemical properties such as light, electricity, magnetism, heat, mechanics, and mechanics. This makes nanotechnology rapidly penetrate into various research fields. The field has attracted the attention of many physicists, chemists and material scientists at home and abroad, and has become the hottest scientific research hotspot in the world. Carbon exists widely in nature, and its unique properties and diverse structural forms are gradually discovered or synthesized with the progress of human civilization: three-dimensional diamond, two-dimensional graphene, one-dimensional carbon nanotubes, ...

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Problems solved by technology

Chong et al. used a bracket to support the substrate for sampling, which is inconvenient to adjust the sampling height and difficult to control the sampling time precisely (references: Chong C T, Tan W H, Lee S L, etal.Morphology and Growth of Carbon Nanotubes Catalytically Synthesized by Premixed Hydrocarbon-rich Flames[J ].Materials Chemistry and Physics,2017,197:246-255.); Tsinghua University Yu Tzuyuan suspended substrate sampling on the plexiglass cover, and it is also difficult to accurately control the sampling height and sampling time (References: Yu Tzuyuan, Yu Xiaoli, Yang Xiaoyong, et al. Experimental study on the synthesis of carbon nanotubes by controlled methane diffusion flame[J]. Thermal Science and Technology, 2007,6(4):340-345.); Nanotubes, support substrate fixed on alcohol etc. 9): 2119-2125.)

[0006] Chinese patent application number: CN201310744312.9 and Chinese patent application number: CN201520133127.0, both proposed a continuous preparation of carbon nanotubes in a conveyor belt, which pointed out a good direction for the large-scale preparation of carbon nanotubes by flame method, but At present, the large-scale preparation of carbon nanotubes by flame method is still in the basic research

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