Quantum Molecular Sieving Effects of H2 and D2 on Bundled and Nonbundled Single-Walled Carbon Nanotubes

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• 作者：Hirotoshi Kagita ; Tomonori Ohba ; Toshihiko Fujimori ; Hideki Tanaka ; Kenji Hata ; Sei-ichi Taira ; Hirofumi Kanoh ; Daiki Minami ; Yoshiyuki Hattori ; Tsutomu Itoh ; Hyuma Masu ; Morinobu Endo ; Katsumi Kaneko
• 刊名：The Journal of Physical Chemistry C
• 出版年：2012
• 出版时间：October 4, 2012
• 年：2012
• 卷：116
• 期：39
• 页码：20918-20922
• 全文大小：319K
• 年卷期：v.116,no.39(October 4, 2012)
• ISSN：1932-7455

文摘

The quantum molecular sieving effects of pore-structure-controlled single-walled carbon nanotubes (SWCNTs) for H₂ and D₂ were evaluated at 20, 40, and 77 K. The adsorption amounts of D₂ were larger than those of H₂. The lower the adsorption temperature, the greater the difference between the D₂ and H₂ adsorption amounts. Bundled SWCNTs with interstitial pores of diameter 0.6 nm gave the greatest adsorption difference between D₂ and H₂ per unit pore volume. Diffusion-dominated behavior was observed in the low-pressure region at 20 and 40 K as a result of lower mobility. Bundled SWCNTs with only interstitial pores provided a significant quantum molecular sieving as a result of strongly interacting potential wells.