Synthesis of thin-multiwalled carbon nanotubes by Fe-Mo/MgO catalyst using sol-gel method
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서지정보
ㆍ발행기관 : 한국탄소학회
ㆍ수록지정보 : Carbon Letters / 13권 / 2호
ㆍ저자명 : Prashant Dubey, Sang Kyu Choi, Bawl Kim, Cheol Jin Lee
ㆍ저자명 : Prashant Dubey, Sang Kyu Choi, Bawl Kim, Cheol Jin Lee
목차
1. Introduction2. Experimental section
3. Results and Discussion
4. Conclusions
Acknowledgements
References
한국어 초록
The sol-gel technique has been studied to fabricate a homogeneous Fe-Mo/MgO catalyst.Ambient effects (air, Ar, and H2) on thermal decomposition of the citrate precursor have
been systematically investigated to fabricate an Fe-Mo/MgO catalyst. Severe agglomeration
of metal catalyst was observed under thermal decomposition of citrate precursor in air atmosphere.
Ar/H2 atmosphere effectively restricted agglomeration of bimetallic catalyst and formation
of highly-dispersed Fe-Mo/MgO catalyst with high specific surface-area due to the
formation of Fe-Mo nanoclusters within MgO support. High-quality thin-multiwalled carbon
nanotubes (t-MWCNTs) with uniform diameters were achieved on a large scale by catalytic
decomposition of methane over Fe-Mo/MgO catalyst prepared under Ar-atmosphere.
The produced t-MWCNTs had outer diameters in the range of 4-8 nm (average diameter
~6.6 nm) and wall numbers in the range of 4-7 graphenes. The as-synthesized t-MWCNTs
showed product yields over 450% relative to the utilized Fe-Mo/MgO catalyst, and indicated
a purity of about 85%.
영어 초록
The sol-gel technique has been studied to fabricate a homogeneous Fe-Mo/MgO catalyst.Ambient effects (air, Ar, and H2) on thermal decomposition of the citrate precursor havebeen systematically investigated to fabricate an Fe-Mo/MgO catalyst. Severe agglomerationof metal catalyst was observed under thermal decomposition of citrate precursor in air atmosphere.Ar/H2 atmosphere effectively restricted agglomeration of bimetallic catalyst and formationof highly-dispersed Fe-Mo/MgO catalyst with high specific surface-area due to theformation of Fe-Mo nanoclusters within MgO support. High-quality thin-multiwalled carbonnanotubes (t-MWCNTs) with uniform diameters were achieved on a large scale by catalyticdecomposition of methane over Fe-Mo/MgO catalyst prepared under Ar-atmosphere.The produced t-MWCNTs had outer diameters in the range of 4-8 nm (average diameter~6.6 nm) and wall numbers in the range of 4-7 graphenes. The as-synthesized t-MWCNTsshowed product yields over 450% relative to the utilized Fe-Mo/MgO catalyst, and indicateda purity of about 85%.참고 자료
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