Three-dimensional carbon nanotube scaffolds as particulate filters and catalyst support membranes.
Three-dimensional carbon nanotube scaffolds created using micromachined Si/SiO2 templates are used as nanoparticulate filters and support membranes for gas-phase heterogeneous catalysis. The filtering efficiency of better than 99% is shown for the scaffolds in filtering submicrometer particles from air. In the hydrogenation of propene to propane reaction low activation energy of E(a) approximately 27.8 +/- 0.6 kJ x mol(-1), a considerably high turnover rate of approximately 1.1 molecules x Pd site(-1) x s(-1) and durable activity for the reaction are observed with Pd decorated membranes. It is demonstrated that appropriate engineering of macroscopic-ordered nanotube architectures can lead to multifunctional applications.
Halonen
Niina
N
Microelectronics and Materials Physics Laboratories, and EMPART Research Group of Infotech Oulu, Department of Electrical and Information Engineering, University of Oulu, P.O. Box 4500, FIN-90014 University of Oulu, Finland.
Rautio
Aatto
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Kyllönen
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Tóth
Géza
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Lappalainen
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Kordás
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Huuhtanen
Mika
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Keiski
Riitta L
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Szabó
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Kukovecz
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Kónya
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Kiricsi
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Ajayan
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