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Water Concentration Influence on Catalytic Growth of Carbon Nanotubes in a Suspended Bed Reactor

Published online by Cambridge University Press:  30 March 2012

V.Z. Mordkovich ,
A.R. Karaeva ,
M.A. Khaskov ,
I.G. Solomonik ,
E.B. Mitberg ,
B.A. Kulnitskiy  and
I.A. Perezhogin
V.Z. Mordkovich
Affiliation:
Technological Institute for Superhard and Novel Carbon Materials, 7A Centralnaya street, Troitsk 142190, Russia INFRA Technologies Ltd., Mokhovaya 11-3B, Moscow 125993, Russia
A.R. Karaeva
Affiliation:
Technological Institute for Superhard and Novel Carbon Materials, 7A Centralnaya street, Troitsk 142190, Russia INFRA Technologies Ltd., Mokhovaya 11-3B, Moscow 125993, Russia
M.A. Khaskov
Affiliation:
Technological Institute for Superhard and Novel Carbon Materials, 7A Centralnaya street, Troitsk 142190, Russia
I.G. Solomonik
Affiliation:
Technological Institute for Superhard and Novel Carbon Materials, 7A Centralnaya street, Troitsk 142190, Russia
E.B. Mitberg
Affiliation:
Technological Institute for Superhard and Novel Carbon Materials, 7A Centralnaya street, Troitsk 142190, Russia INFRA Technologies Ltd., Mokhovaya 11-3B, Moscow 125993, Russia
B.A. Kulnitskiy
Affiliation:
Technological Institute for Superhard and Novel Carbon Materials, 7A Centralnaya street, Troitsk 142190, Russia
I.A. Perezhogin
Affiliation:
Technological Institute for Superhard and Novel Carbon Materials, 7A Centralnaya street, Troitsk 142190, Russia
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Abstract

One of the most important problems in the synthesis of carbon nanotubes is the problem of controlling their morphology, namely: length, aspect ratio, alignment, etc. Catalytic synthesis of carbon nanotubes in a suspended bed reactor allowed to study the possibilities of controlling the growth of nanotubes by introducing a certain amount of water vapor and carbon-containing materials in the reaction zone. The synthesized long carbon nanotubes were studied by Raman spectroscopy, transmission and scanning electron microscopy. We found that water concentration influences both yield and the structure of nanotubes. It is shown that the yield of centimeter-long nanotubes can be maximized at an optimum H2O/C ratio, while deviations dramatically change morphology and thickness of the nanotubes.

Keywords

transmission electron microscopy (TEM)nanostructurechemical vapor deposition (CVD) (chemical reaction)
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 1407: Symposium AA – Carbon Nanotubes, Graphene and Related Nanostructures , 2012 , mrsf11-1407-aa06-06
Copyright
Copyright © Materials Research Society 2012

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