Continuous preparation system and preparation method of single-walled carbon nanotube

Abstract

The invention belongs to the technical field of new materials, and relates to a single-walled carbon nanotube continuous preparation system and a process method, the device is formed by connecting a high temperature reaction chamber and a cooling unit in series, and vacuum, gas circuit, control, cooling and feeding systems and the like are used for assistance. According to the preparation method,a metal catalyst serving as a counter electrode is evaporated to form tiny catalyst particles by utilizing high temperature generated by direct-current arc flame, the tiny catalyst particles are rapidly combined with a high-temperature cracked organic carbon source to catalyze to generate single-walled carbon nanotubes, the single-walled carbon nanotubes are cooled and then enter a gas-solid separator, the obtained single-walled carbon nanotubes are enriched and separated by utilizing a magnetic field, and finally, the gas-solid separator is subjected to back-blowing by adopting inert gas to obtain a final product. According to the method, the catalyst can exist in the form of ultrafine particles in a high-temperature growth state, strict regulation and control on the purity, the pipe diameter structure and the like of the single-walled carbon nanotube are truly realized, and the high-quality single-walled carbon nanotube is continuously prepared. The device and the process are high inproduction efficiency and have important industrialization value.

Description

technical field [0001] The invention belongs to the technical field of new materials, and relates to a nano-carbon material, in particular to a continuous preparation system and a preparation method of single-walled carbon nanotubes. Background technique [0002] The development of carbon nanotubes has been devoted to how to reduce the defect content, improve its structural integrity, and develop in the direction of fine tube diameter, low defect, and high degree of graphitization, and the development of high-performance electronic devices has further promoted the development of semiconducting carbon materials. The rise of single-walled carbon nanotubes with controllable structure has become its ultimate goal. In order to control the size of the catalyst during the growth of carbon nanotubes, the efficiency has to be sacrificed, the catalyst concentration is reduced to a very low level to reduce the catalyst particle size, and the growth temperature is controlled to avoid ag...

AI Technical Summary

Problems solved by technology

[0004] However, due to the large surface area of ​​single-walled carbon nanotubes, it is easy to agglomerate to form a film-like substance, and the traditional cyclone separation or filtration methods can easily cause rapid blockage of the filter device and cannot operate continuously.

And it is still a challenging task to carry out stable and continuous collection without affecting the high temperature reaction

Images