Repository logo
 

Synthesis of single-walled carbon nanotubes in rich hydrogen/air flames

Accepted version
Peer-reviewed

Type

Article

Change log

Authors

Zhang, C 
Tian, B 
Chong, CT 
Ding, B 
Fan, L 

Abstract

© 2020 Elsevier B.V. We explore the production of single-walled carbon nanotubes (CNTs) in a stream surrounded by rich premixed laminar H2/air flames using a feedstock containing ethanol and ferrocene. The as-produced nanomaterials were characterised by Raman spectroscopy, transmission electron microscopy, scanning electron microscopy and X-ray diffraction. A formation window of equivalence ratios of 1.00–1.20 was identified, and single-walled CNT bundles with individual CNTs of an average diameter of 1 nm were observed. The formation of CNTs was accompanied by the production of highly crystalline Fe3O4 nanoparticles of a size of 20–100 nm. The investigation of the limiting factors for the CNT synthesis was carried out systematically, assisted by numerical modelling. We conclude that the key factors affecting CNT synthesis are the surrounding flame temperatures, and the concentration of carbon available for CNT nucleation.

Description

Keywords

Carbon nanotubes, Flames, Combustion, Hydrogen, Pyrolysis

Journal Title

Materials Chemistry and Physics

Conference Name

Journal ISSN

0254-0584
1879-3312

Volume Title

254

Publisher

Elsevier BV
Sponsorship
Engineering and Physical Sciences Research Council (EP/M015211/1)
EPSRC (EP/M015211/1)
EPSRC (ANAM)