Synthesis of Carbon Nanotubes by Floating Catalyst Chemical Vapor Deposition and Their Applications

Abstract

Floating catalyst chemical vapor deposition (FCCVD) has been one of the most important techniques for the synthesis of high-quality single-, double-, and multi-wall carbon nanotubes (CNTs). The method is characterized of simple processing, good controllability, and desirable scalability. The bulk morphologies of the synthesized CNTs can be sponge-like, an array, a thin film, or fiber by simply changing the growth parameters and the way they are collected, which facilitates a wide range of applications. The authors comprehensively review the state-of-the-art progress on the controlled growth of CNTs by FCCVD which have a defined number of walls, and controlled diameter, bundle size, and type of conductivity. The properties and possible applications for the CNTs and their hybrids are summarized. Finally, insights into the key challenges and prospects for CNTs synthesized by FCCVD are discussed.

A high-performance photodetector based on small-bundled single-wall carbon nanotube film/silicon heterojunctions

“…1g–i), we found that there was almost no change in the morphology of the welding structure after tilting for 60°, indicating that the junctions are well wrapped by the deposited carbon composed of graphitic microcrystals. 30 Previous work 30,32,33 demonstrated that lowering the concentration of catalyst nanoparticles and hence the density of grown SWCNTs is essential to decreasing the size of SWCNT bundles. In this work, we intentionally use a relatively high H 2 flow rate and low catalyst precursor feeding.…”

A Flexible NO2 Gas Sensor Based on Single-Wall Carbon Nanotube Films Doped with a High Level of Nitrogen

“…Flexible and transparent SWCNT films were prepared by a floating catalyst chemical vapor deposition (FCCVD) method [ 33 ]. The growth temperature was 1100 °C, and hydrogen was used as a carrier gas.…”

Continuously processing waste lignin into high-value carbon nanotube fibers

“…In addition, post-treatment is usually used to improve the mechanical, electrical, and thermal properties of CNT fibers, including solvent/mechanical densification 21 , chemical doping 22 , metal coating 23 , acid treatment 24 , and purification 25 . Currently, the most commonly used method for continuously preparing CNT fibers is FCCVD 26 . The carbon sources used in this method are mainly from petroleum fine chemicals, such as methane, ethylene, ethanol, toluene and xylene 27 .…”