Fine-tuning of spark-discharge aerosol CVD reactor for single-walled carbon nanotube growth: The role of ex situ nucleation
No Thumbnail Available
Access rights
openAccess
URL
Journal Title
Journal ISSN
Volume Title
A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
This publication is imported from Aalto University research portal.
View publication in the Research portal (opens in new window)
View/Open full text file from the Research portal (opens in new window)
Other link related to publication (opens in new window)
View publication in the Research portal (opens in new window)
View/Open full text file from the Research portal (opens in new window)
Other link related to publication (opens in new window)
Date
2020-03-01
Major/Subject
Mcode
Degree programme
Language
en
Pages
Series
Chemical Engineering Journal, Volume 383
Abstract
We report a development of recently designed apparatus equipped with a spark discharge generator of catalytic nanoparticles for robust aerosol CVD synthesis of single-walled carbon nanotubes. We achieve a profound control over the diameter distribution and the defectiveness of carbon nanotubes produced. By providing a justified comparison of the apparatus with the most abundant aerosol CVD reactor utilizing ferrocene as a catalyst precursor, we reveal the role of the activation procedure: while spark-discharge generator provides aerosol of nanoparticles (ex situ route), the ferrocene vapor decomposes in the nanotube growth zone providing an in situ formation of the catalyst. With other parameters being equal, we reveal the differences in the nanotube growth (diameter and length distribution, yield, defectiveness) employing a comprehensive set of methods (the analysis of differential mobility of the aerosol particles, optical spectroscopy, scanning and transmission electron microscopy, Raman spectroscopy, and atomic force microscopy). We show the ex situ activation in the spark discharge reactor to provide a lower utilization degree of the nanoparticles due to over-coagulation. However, the same method provides an independence of the key performance parameters of the nanotubes opening a room for scaling the apparatus.Description
Keywords
Aerosol CVD synthesis, Catalyst activation, Differential mobility analyzer, Floating catalyst, Single-walled carbon nanotubes, Spark-discharge generator
Other note
Citation
Iakovlev, V Y, Krasnikov, D V, Khabushev, E M, Alekseeva, A A, Grebenko, A K, Tsapenko, A P, Zabelich, B Y, Kolodiazhnaia, J V & Nasibulin, A G 2020, ' Fine-tuning of spark-discharge aerosol CVD reactor for single-walled carbon nanotube growth : The role of ex situ nucleation ', Chemical Engineering Journal, vol. 383, 123073 . https://doi.org/10.1016/j.cej.2019.123073