Lanthanum doped monometallic catalyst for preparing carbon nano tube with uniform diameter and preparing process thereof

Abstract

The invention discloses a method for preparing a lanthanum doping monometallic catalyst, which is used in making the uniform caliber carbon nanometer tube. The catalyst uses magnesia as the carrier, uses the oxide of cobalt, iron or nickel as the metal oxide component, uses the oxide of lanthanum as the doping component, and uses the oxide of molybdenum as the catalytic promoter. The method comprises: a) dissolving the magnesium salt in the distilled water, b) adding the metal oxide component, the lanthanum doping component salt and the catalytic promoter, making them dissolved absolutely, wherein the molar ratio of the four is: 0.5~3.0:0.1~1.0:0.01~1.0:0.5~3.0, c) drying said solution in 120-200 DEG C for 3-5 hours, calcining in 550-850 DEG C for 10-30 minutes, d) grinding them to powder and getting the catalyst, which can be used for producing the carbon nanometer tube with uniform caliber.

Description

technical field [0001] The invention relates to a catalyst for preparing carbon nanotubes, in particular to a lanthanum-doped single metal catalyst and a preparation method for preparing carbon nanotubes with uniform diameters. Background technique [0002] Carbon nanotubes are a new type of carbon structure discovered in the 1990s. They have excellent mechanical, mechanical, electronic, optical, thermal and energy storage properties, which have attracted considerable attention. It has potential wide application in many fields. Utilizing its excellent mechanical, mechanical and electrical properties, it can be added to various metal, non-metal or polymer materials, which can enhance the various properties of the material and improve its conductivity; use its excellent electron emission properties , can obtain field emission flat panel display with low driving voltage; use its nanometer size and conductivity to design micro-electromechanical systems; use its unique cavity st...

AI Technical Summary

Problems solved by technology

However, the key to the preparation of carbon nanotubes by the CCVD method is the preparation technology of the catalyst. The carbon nanotubes prepared by different catalysts have different shapes and properties, and one of the important problems is the uniformity of the diameter of the carbon nanotubes.

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