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 CO₂ 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 CO₂ adsorption capacity of this material by ∼24% at 30 bar and 298 K compared to opened CNHs alone.

中文翻译：

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由碳纳米角和垂直排列的碳纳米管组成的全碳纳米材料中的气体吸附能力

垂直排列的碳纳米管（VACNT）通常在高压下表现出良好的吸附性能，而碳纳米角（CNHs）由于其固有的微孔性，在低压状态下表现出优异的气体吸附性能。当两种材料的尖端都打开时，这些吸附特性会进一步增强。如此制备的复合材料允许人们研究由开放的双壁碳纳米管（CNT）组成的VACNTs的特定吸附位点和球形聚集的开放的单壁碳纳米角所形成的特定吸附位点中，CO ₂分子的物理截留效应。将50 wt％的末端开放的CNT与末端开放的CNH结合会增加CO ₂ 与单独打开的CNH相比，该材料在30 bar和298 K时的吸附能力约为24％。