Preparation of double-walled carbon nanotubes from fullerene ...

CARBON 48 (2010) 1312– 1320 1315
structure of FWS-derived anodes, which is evidenced by the
fact that no DWCNTs are obtained under identical arcing conditions
when high-purity graphite powder was used instead
of FWS powders. Previous study suggested that FWS may be
seen as icospiral graphitic giant molecules or spheroidal graphitic
microparticles with pentagonal configurations [13–15],
and the structure may remain curly after carbonization
[16,17]. With all of these information in mind, it is easy for
one to envision that some special Cn species formed in the
arcing discharge of FWS-derived carbon rods would act as
the basic building blocks for the construction of DWCNTs
[18]. To confirm and clarify this speculation, more detailed
work would be necessary, in which the effect of composition
and structures of the FWS-anodes needs to be addressed. The
work is now in progress.
In summary, high quality DWCNTs were synthesized by
arc-discharge using FWS as raw material. The present work
provides an alternative way for direct synthesis of high quality
DWCNTs, and opens a new cost-effective approach to utilization
of FWS.
Acknowledgements
The work was supported by the National Natural Science
foundation of China (Nos. 50472082, 20836002, 20725619).
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