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755078 
Journal Article 
Three-dimensional carbon nanotube scaffolds as particulate filters and catalyst support membranes 
Halonen, N; Rautio, A; Leino, AR; Kyllönen, T; Tóth, G; Lappalainen, J; Kordás, K; Huuhtanen, M; Keiski, RL; Sápi, A; Szabó, M; Kukovecz, A; Kónya, Z; Kiricsi, I; Ajayan, PM; Vajtai, R 
2010 
1 
ACS Nano
ISSN: 1936-0851
EISSN: 1936-086X 
4 
4 
2003-2008 
English 
20369888 
WOS:000276956800032 
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. 
carbon nanotubes; catalyst support; submicrometer filtering; air filter; propene 
• Nanoscale Carbon