Surface energy heterogeneity and heterogeneous adsorption of benzene on double-walled carbon nanotubes.
We examined the adsorption properties of double walled carbon nanotubes (DWCNTs) synthesized by using a catalytic chemical decomposition vapor method. To analyze the structural and energetical surface characteristics of the DWCNTs, nitrogen and benzene adsorption isotherms were measured. The Toth isotherm equation was used to correlate the adsorption data and evaluate the thermodynamic properties such as Henry's constant and the adsorption second virial coefficient. The existence of heterogeneous surface in DWCNTs was confirmed by the analysis of pore size distribution, the isosteric heat of adsorption, and the adsorption energy distribution determined for nitrogen and benzene.
Faculty of Applied Chemical Engineering and Center for Functional Nano Fine Chemicals (BK21 CFN), Chonnam National University 300 Yongbong Dong, Buk-Ku, Gwangju 500-757, Korea.
Wang-Geun
WG
Shim
Min-Joo
MJ
Lee
Hyun-Chul
HC
Kang
Chan
C
Kim
Jae-Wook
JW
Lee
Sang-Chai
SC
Kim
Hee
H
Moon
D000327:Adsorption; D001554:Benzene / Q000737:chemistry*; D003198:Computer Simulation; D003460:Crystallization / Q000379:methods*; D004735:Energy Transfer; D046911:Macromolecular Substances / Q000737:chemistry; D008422:Materials Testing; D008956:Models, Chemical; D008968:Molecular Conformation; D036103:Nanotechnology / Q000379:methods*; D037742:Nanotubes, Carbon / Q000737:chemistry* / Q000648:ultrastructure*; D010316:Particle Size; D013500:Surface Tension
D046911:Macromolecular Substances; D037742:Nanotubes, Carbon; D001554:Benzene