High-magnification carbon nanotubes having ultrafine tube diameter and prepared by two-stage method, catalyst and preparation method of catalyst

Abstract

The invention belongs to the technical field of preparation of carbon nanotubes, and particularly relates to high-magnification carbon nanotubes having an ultrafine tube diameter and prepared by a two-stage method, a catalyst and a preparation method of the catalyst. The high-magnification carbon nanotube catalyst having the ultrafine tube diameter and prepared by the two-stage method is composedof the following components in parts by weight: an active metal dispersion phase comprising 14.6-25.9 parts of cobalt nitrate, 0.9-2.7 parts of ammonium molybdate, 0-10.9 parts of ferric nitrate and 0-8.4 parts of nickel nitrate; a carrier metal continuous phase comprising 30.9-54.6 parts of aluminum nitrate and 25.4-45.3 parts of magnesium nitrate; and 15.2-22.6 parts of a complexing agent. The active metal particles in the catalyst are small in particle size and large in number, the outer diameter of the carbon nanotubes generated through cracking is 5 nm-10 nm, the multiplying power can reach 45-55 times, and the yield is 1.3-2.0 times of the yield of a conventional superfine carbon nanotube catalyst; the preparation process of the catalyst can effectively control the particle size of the active metal particles in the catalyst, is simple and convenient in technological process, and is beneficial to industrial large-scale production.

Description

technical field [0001] The invention belongs to the technical field of carbon nanotube preparation, and in particular relates to a two-stage method for preparing carbon nanotubes with high-magnification ultra-fine diameters, a catalyst and a preparation method thereof. Background technique [0002] Carbon nanotubes are a new type of material that attracts worldwide attention. They have large specific surface area, light weight but super strong mechanical strength, excellent electrical conductivity, good physical and chemical stability, and are used as conductive agents in lithium-ion batteries. , catalyst carrier, drug carrier, enhanced blending materials, electronic devices and other fields have broad application prospects. Carbon nanotubes have very good electrical conductivity, and at the same time have a very high aspect ratio. Adding carbon nanotubes to the electrode material of lithium-ion batteries can effectively form a conductive network and improve the electrical c...

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Problems solved by technology

[0008] The present invention aims at the problem that the existing carbon nanotube catalysts cannot simultaneously prepare carbon nanotubes with high-rate ultra-fine tube diameters, and proposes a simple and low-cost two-stage method for preparing carbon nanotube catalysts with high-rate ultra-fine tube diameters, and Using the Catalyst to Prepare High-Ratio Ultra-fine Diameter Carbon Nanotubes

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