Three-Dimensional Carbon Nanotube Scaffolds as Particulate Filters and Catalyst Support Membranes
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- 作者：Niina Halonen ; Aatto Rautio ; Anne-Riikka Leino ; Teemu Kyllönen ; Géza Tóth ; Jyrki Lappalainen ; Krisztián Kordás ; Mika Huuhtanen ; Riitta L. Keiski ; András Sápi ; Mária Szabó ; Ákos Kukovecz ; Zoltán Kónya ; Imre Kiricsi ; Pulickel M. Ajayan ; Robert Vajtai
- 刊名：ACS Nano
- 出版年：2010
- 出版时间：April 27, 2010
- 年：2010
- 卷：4
- 期：4
- 页码：2003-2008
- 全文大小：343K
- 年卷期：0
- ISSN：1936-086X
文摘
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 Ea ∼27.8 ± 0.6 kJ·mol−1, a considerably high turnover rate of ∼1.1 molecules·Pd site−1·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.