Puthusseri Divya, Babu Deepu J, Okeil Sherif, Schneider Jörg J
Fachbereich Chemie, Eduard-Zintl-Institut für Anorganische und Physikalische Chemie, Technische Universität Darmstadt, Alarich-Weiss-Str.12, 64287 Darmstadt, Germany.
Phys Chem Chem Phys. 2017 Oct 4;19(38):26265-26271. doi: 10.1039/c7cp05022d.
Whereas vertically aligned carbon nanotubes (VACNTs) typically show a promising adsorption behavior at high pressures, carbon nanohorns (CNHs) exhibit superior gas adsorption properties in the low pressure regime due to their inherent microporosity. These adsorption characteristics are further enhanced when both materials are opened at their tips. The so prepared composite material allows one to investigate the effect of physical entrapment of CO molecules within the specific adsorption sites of VACNTs composed of opened double walled carbon nanotubes (CNTs) and in specific adsorption sites created by spherically aggregated opened single walled carbon nanohorns. Combining 50 wt% of tip opened CNTs with tip opened CNHs increases the CO adsorption capacity of this material by ∼24% at 30 bar and 298 K compared to opened CNHs alone.
垂直排列的碳纳米管（VACNTs）通常在高压下表现出良好的吸附行为，而碳纳米角（CNHs）由于其固有的微孔结构，在低压范围内表现出优异的气体吸附性能。当两种材料的尖端都被打开时，这些吸附特性会进一步增强。如此制备的复合材料能够研究CO分子在由打开的双壁碳纳米管（CNTs）组成的VACNTs的特定吸附位点以及由球形聚集的打开的单壁碳纳米角形成的特定吸附位点内物理截留的影响。与单独的打开的碳纳米角相比，将50 wt%的尖端打开的碳纳米管与尖端打开的碳纳米角相结合，在30 bar和298 K下，这种材料的CO吸附容量提高了约24%。
