摘要:

IntroductionCarbon nanotubes (CNTs) are widely considered as promising materials both in nanochemistry and nanoelectronics.1–3New generations of composite materials, semiconductor circuits or TV screens based upon CNT technology are under construction and very near to being realized.4However, in order to appear on the market and later in the households, these products as well as their components must be cheap enough.In contrast to the laser ablation5and arc discharge6techniques catalytic chemical vapour deposition (CCVD) is able to produce nanotubes in industrial quantities. In the laboratory scale C2H2or C2H4as carbon sources, cobalt, iron or nickel as catalyst particles, and high surface area SiO2, Al2O3or zeolite supports are commonly used for the synthesis of multiwalled nanotubes (MWNTs).7–11After the synthesis process nanotubes must be removed from the catalyst. This means strong acidic (HF in the case of zeolites) or basic (concentrated NaOH in the case of Al2O3and SiO2) treatment in most of the cases. Applying a water soluble catalyst support could make the purification step easier controllable, more economical, and environmentally friendly.

ISSN:1460-2733    

DOI:10.1039/b305670h

出版商:RSC    

年代:2003

数据来源: RSC