| abstract |
The invention belongs to the technical field of new materials, and particularly relates to a system and method for preparing single-wall carbon nanotubes by a plasma arc method. The system includes a powder feeding unit, a plasma arc furnace unit, a gas circuit and a cooling auxiliary unit, and a collection unit; the preparation method is: starting the arc of the plasma arc furnace to the reaction zone and preheating to a specified temperature, and then adding the powder catalyst and Auxiliary, through the feeding device, the carrier gas is used to enter the graphite crucible from the cathode of the electric arc furnace, and the single-walled carbon nanotube product is obtained through a high-temperature chemical reaction, and then the outer carrier gas of the graphite crucible is used to blow out the furnace body, and the final product is obtained through the collection unit. The device and method of the present invention utilizes the high temperature zone formed by the arc confined in the deep graphite crucible to obtain higher reaction temperature and longer reaction residence time, and at the same time utilizes the activation effect of arc plasma to prepare high crystallinity. Single-walled carbon nanotubes can be prepared continuously and efficiently, and have great commercial value. |