A method for manufacturing multi-wall carbon nanotubes, includes the steps of: (a) dissolving a metal precursor in a solvent to prepare a precursor solution; (b) perform thermal decomposition while spraying the precursor solution into a reactor, thereby forming a catalyst powder; and (c) introducing the catalyst powder into a fluidized-bed reactor heated to 600-900° C. and spraying a carbon-based gas and a carrier gas to synthesize multi-wall carbon nanotubes from the catalyst powder, wherein steps (a) to (c) are performed in a continuous type and wherein the catalyst powder contains metal components according to equation 1 below. <Equation 1> Ma:Mb=x:y, wherein Ma represents at least two metals selected from Fe, Ni, Co, Mn, Cr, Mo, V, W, Sn, and Cu; Mb represents at least one metal selected from Mg, Al, Si, and Zr; x and y each represent the molar ratio of Ma and Mb; and x+y=10, 2.0≤x≤7.5, and 2.5≤y≤8.0.

Apparatus for plasma synthesis of carbon nanotubes, comprising: a plasma nozzle coupled to a reaction tube or chamber; means for supplying a process gas to the plasma nozzle, the process gas comprising a carbon-containing species; means for supplying radio frequency radiation to the process gas within the plasma nozzle, so as to sustain a plasma within the nozzle in use, and thereby cause cracking of the carbon-containing species; and means for providing a catalyst; wherein the plasma nozzle is arranged such that an afterglow of the plasma extends into the reaction tube/chamber, the cracked carbon-containing species also pass into the reaction tube/chamber, and the cracked carbon-containing species recombine within the afterglow, so as to form carbon nanotubes in the presence of the catalyst. A method of plasma-synthesising carbon nanotubes is also provided.

Apparatus for plasma synthesis of carbon nanotubes, comprising: a plasma nozzle coupled to a reaction tube or chamber; means for supplying a process gas to the plasma nozzle, the process gas comprising a carbon-containing species; means for supplying radio frequency radiation to the process gas within the plasma nozzle, so as to sustain a plasma within the nozzle in use, and thereby cause cracking of the carbon-containing species; and means for providing a catalyst; wherein the plasma nozzle is arranged such that an afterglow of the plasma extends into the reaction tube/chamber, the cracked carbon-containing species also pass into the reaction tube/chamber, and the cracked carbon-containing species recombine within the afterglow, so as to form carbon nanotubes in the presence of the catalyst. A method of plasma-synthesising carbon nanotubes is also provided.

This disclosure relates to the technical field of carbon nanotubes, provides an ultra-long chiral carbon nanotube and a method for preparing the same. The ultra-long chiral carbon nanotube has a diameter of about 1.5 nm to 5.5 nm and has a length of about 100 mm to 650 mm, the ultra-long chiral carbon nanotube includes a double-walled carbon nanotube and a triple-walled carbon nanotube, and each layer of the ultra-long chiral carbon nanotube is semiconducting and has a helix angle greater than 10°.

The present disclosure provides an apparatus capable of continuously producing carbon nanotubes having high crystallinity, a low residual catalyst content and a high aspect ratio. The apparatus for producing carbon nanotubes includes: a reaction unit configured to synthesize carbon nanotubes (CNTs), a supply unit configured to supply a carbon source to the reaction unit through a supply pipe; and a collection unit configured to collect carbon nanotubes discharged from the reaction unit, wherein the reaction unit may include a chemical vapor deposition reactor.

The present disclosure provides an apparatus capable of continuously producing carbon nanotubes having high crystallinity, a low residual catalyst content and a high aspect ratio. The apparatus for producing carbon nanotubes includes: a reaction unit configured to synthesize carbon nanotubes (CNTs), a supply unit configured to supply a carbon source to the reaction unit through a supply pipe; and a collection unit configured to collect carbon nanotubes discharged from the reaction unit, wherein the reaction unit may include a chemical vapor deposition reactor.

The present invention relates to a method for preparing a carbon nanotube fiber which is a continuous array of carbon nanotube. The present invention enables minimization of rotational flow inside a tube reactor and thus can facilitate enhanced tensile strength of the prepared carbon nanotube fiber.

The present invention relates to a method for preparing a carbon nanotube fiber which is a continuous array of carbon nanotube. The present invention enables minimization of rotational flow inside a tube reactor and thus can facilitate enhanced tensile strength of the prepared carbon nanotube fiber.

A method for making nanomaterials includes introducing into a catalyzed reactor vessel: a carrier gas at a first carrier gas feed rate; at least one carbon-based reactant at a first reactant feed rate; and optionally, at least one additive at a first additive feed rate. The reactor vessel is heated to a first temperature of at least 150 C., so that a portion of the carbon-based reactant within the reactor vessel reacts to form a plurality of nanomaterials. An exhaust gas is removed from the reactor and periodically sampled by exposing a paper web to the gas so that a sample of the nanomaterials from the gas are deposited on a region of the paper web for analysis. Based on this analysis, at least one reaction parameter selected from the group consisting of the first carrier gas feed rate, the first reactant feed rate, and first temperature may be adjusted.

The present disclosure relates to a method for the continuous production of carbon nanotubes, the method comprising: a mixture preparing step for mixing and stirring a solvent, a metal salt, a surfactant, a reducing agent, and a function improving agent to prepare an emulsion mixture; a gaseous mixture forming step for mixing the emulsion mixture with a carrier gas to form a gas phase mixture; and a reacting step for introducing the gas phase mixture into a heated reactor to form carbon nanotubes, wherein the diameter of the carbon nanotubes can be uniformly controlled, and the production yield of the carbon nanotubes can be increased.