Studies on Preparation of Carbon Nanotubes by Catalytic Processes

Abstract

Nonmaterials with new applications and functions are of vital importance to industry development. It is not easy to produce advanced materials without introducing new synthesis processes. One of the most recent and important techniques is known as Catalytic Chemical Vapor Deposition (CCVD) which is use mainly to produce advanced materials. Multi-walled carbon nanotubes (MWCNTs) have become an important class of Nanomaterials and have a wide range of applications. The present investigation aims to synthesize multi-walled carbon nanotubes (MWCNTs) and hydrogen by the CCVD technique. The dependence of microstructure, composition and quality of products, as well as carbon and hydrogen yield on the catalytic active metal, metal content and support types of the catalysts have been studied. The work was extended to study the direct catalytic decomposition of natural gas to pure hydrogen and synthesis of MWCNTs. The thermal gravimetric analysis and temperature programed reduction of the different catalysts were investigated.