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Growth of carbon nanotubes from ethylene using catalyst particles that incorporate diffusion inhibitor metals
Ist Teil von
MRS Advances, 2022-04, Vol.7 (9), p.180-184
Ort / Verlag
Cham: Springer International Publishing
Erscheinungsjahr
2022
Link zum Volltext
Quelle
Alma/SFX Local Collection
Beschreibungen/Notizen
Growth of carbon nanotubes (CNTs) by catalytic chemical vapor deposition is studied, using ethylene (C
2
H
4
) as carbon source gas and catalysts consisting of 4th-row catalytic transition metals combined with heavy refractory diffusion inhibitor metals. We investigate the inhibition of high-temperature erosion of the catalyst particles by inclusion of the diffusion inhibitors, which allow the catalyst particles to have a longer lifetime and thus grow longer CNTs. We find that inclusion of either tungsten or osmium with iron catalyst can prolong the lifetime of the catalyst particles, and in the case of tungsten, this results in the growth of longer nanotubes. Implications for the growth of ultra-long (tens of cm or more) CNTs will be discussed.
Graphical abstract