CVD synthesis of hierarchical 3D MWCNT/carbon-fiber nanostructures

Toma Susi, Albert G. Nasibulin, Hua Jiang, Esko I. Kauppinen

Research output: Contribution to journalArticlepeer-review

18 Citations (Scopus)

Abstract

Multiwalled carbon nanotubes (MWCNTs) were synthesized by CVD on industrially manufactured highly crystalline vapor-grown carbon fibers (VGCFs). Two catalyst metals (Ni and Fe) and carbon precursor gases (C 2 H 2 and CO) were studied. The catalysts were deposited on the fibers by sputtering and experiments carried out in two different reactors. Samples were characterized by electron microscopy (SEM and TEM). Iron was completely inactive as catalyst with both C 2 H 2 and CO for reasons discussed in the paper. The combination of Ni and C 2 H 2 was very active for secondary CNT synthesis, without any pretreatment of the fibers. The optimal temperature for CNT synthesis was 750 °C, with total gas flow of 650 cm 3 min -1 of C 2 H 2, H 2, and Ar in 1.0:6.7:30 ratio.

Original languageEnglish
Article number425195
JournalJournal of Nanomaterials
Volume2008
Issue number1
DOIs
Publication statusPublished - 2008
Externally publishedYes

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