An immersion calorimetry study of the interaction of organic compounds with carbon nanotube surfaces

被引：20
作者：
Castillejos, E. [2 ]
Bachiller-Baeza, B. [1 ,2 ]
Rodriguez-Ramos, I. [1 ,2 ]
Guerrero-Ruiz, A. [1 ,3 ]
机构：
[1] Grp Diseno & Aplicac Catalizadores Heterogeneos, Unidad Asociada UNED CSIC, Madrid, Spain
[2] CSIC, Inst Catalisis & Petroleoquim, E-28049 Madrid, Spain
[3] UNED, Fac Ciencias, Dpto Quim Inorgan & Quim Tecn, Madrid 28040, Spain
来源：
CARBON | 2012年 / 50卷 / 08期
关键词：
OXIDATIVE DEHYDROGENATION; ADSORPTION; NANOPARTICLES; NANOFIBERS; DEPENDENCE; CATALYST; NITROGEN; TOLUENE; AREA;
D O I：
10.1016/j.carbon.2012.02.032
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
The interaction of organic chemicals with the surface of carbon nanotubes (CNTs) has been studied by immersion calorimetry revealing new information about the unique CNT surface structures. The curvature of the graphene sheets of in the CNTs increases the adsorption strength of aromatic compounds compared to flat graphite surfaces. For a given CNT, the adsorption affinity of a non-polar aromatic molecule correlated poorly with the CNT hydrophobicity. Comparison of the immersion enthalpies that evolved when the solids were immersed in organic chemicals reveals the formation of pi-pi stacking interactions, H-bonds or electron-accepting interactions depending on the CNT surfaces and on the immersion substrate. The number of oxygen groups on CNTs seems to modify the electron density of their surfaces and therefore the interaction mechanism with the adsorbates. (C) 2012 Elsevier Ltd. All rights reserved.
引用
收藏
页码：2731 / 2740
页数：10
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