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Application of homogeneously precipitated nanosized Fe-doped alumina powders to carbon nanotube growth

Çelik, Yasemin and Suvacι, Ender and Flahaut, Emmanuel and Weibel, Alicia and Peigney, Alain Application of homogeneously precipitated nanosized Fe-doped alumina powders to carbon nanotube growth. (2010) Journal of the American Ceramic Society, vol. 93 (n° 11). pp. 3732-3739. ISSN 0002-7820

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Official URL: http://dx.doi.org/10.1111/j.1551-2916.2010.03980.x

Abstract

Homogeneous precipitation of hydroxides was investigated as an alternative method to synthesize Fe-doped aluminum oxide (α-Al2−2xFe2xO3) particles over which carbon nanotubes (CNTs) were grown via a catalytic chemical vapor deposition (CCVD) method. Performance of the homogeneously precipitated particles for CNT growth was quantitatively compared with that of the combustion-synthesized particles. The main advantage of the homogeneous precipitation of hydroxides and subsequent calcination process against to the combustion synthesis and other commonly practiced chemical routes is the ability to tailor the Fe-doped Al2O3 precursor powder characteristics such as size and specific surface area (SSA) without requiring any milling step and also to control the phase composition of the oxide powder with high Fe content, and subsequently the quality and quantity of CNTs during CCVD process. The particle size of the precipitated and calcined α-Al2−2xFe2xO3 powders varies between ∼50 and 400 nm for 5–10 cat.% Fe-containing systems. The monodispersed particle size distribution and optimum phase composition of the homogeneously precipitated powders, particularly for a 10 cat.% Fe content in the starting oxide, and their much higher SSA than similar materials prepared by other chemical routes lead to production of high amounts of good quality CNTs.

Item Type:Article
Additional Information:Thanks to Wiley editor. The article in final published form may be found at Journal of the American Ceramic Society website :http://onlinelibrary.wiley.com/doi/10.1111/j.1551-2916.2010.03980.x/full
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution:Other partners > Anadolu University (TURKEY)
French research institutions > Centre National de la Recherche Scientifique - CNRS
Université de Toulouse > Institut National Polytechnique de Toulouse - INPT
Université de Toulouse > Université Paul Sabatier-Toulouse III - UPS
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Deposited By:Leila Abdelouhab

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