Influence of gas-mixture composition on yield, purity and morphology of carbon nanotubes grown by catalytic isobutane-decomposition

被引：6

作者：

Donato, M. G. ^{[3
]}

Faggio, G. ^{[1
]}

Galvagno, S. ^{[2
]}

Lanza, M. ^{[3
]}

Messina, G. ^{[1
]}

Milone, C. ^{[2
]}

Piperopoulos, E. ^{[2
]}

Pistone, A. ^{[2
]}

Santangelo, S. ^{[1
]}

机构：

[1] Univ Mediterranea, Dip Meccan & Mat, I-89060 Calabria, Italy

[2] Univ Messina, Dip Chim Ind & Ingn Mat, I-98166 Messina, Italy

[3] CNR, Ist Proc Chim Fis, Sez Messina, I-98123 Messina, Italy

来源：

关键词：

Carbon nanotubes; Isobutane; Raman spectroscopy; Catalytic processes; CHEMICAL-VAPOR-DEPOSITION; NANOFIBERS; CVD;

D O I：

10.1016/j.diamond.2008.09.004

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Present work concerns iron-catalyzed growth of multi-walled C nanotubes (MWCNTs) by decomposition of isobutane (C4H10). MWCNTs are prepared, by chemical vapor deposition (CVD) at 600 degrees C, in C4H10-H-2-He atmosphere over 29 wt.%Fe/Al2O3 catalysts. After purification, reaction products are analyzed by scanning electron microscopy (SEM), Raman spectroscopy (RS) and thermo-gravimetric analysis (TGA). The influence of the gas-mixture composition on the reaction issue is investigated by considering different gas-flowing setups: H-2 or C4H10 flow is varied in the range 15-90 cc/min while keeping hydrocarbon or H-2 constant. The total flow is kept at 120 cc/min by using He as a balance-gas. Owing to these changes, diverse selectivity towards nanotubes, morphologies, size distributions, purity degrees and crystallinity are obtained, as evidenced by the characterization results. (C) 2008 Elsevier B.V. All rights reserved.

引用

页码：360 / 363

页数：4

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