Adsorption/Desorption Behaviors of Carbon Nanotubes, Nanofibers Produced by Chemical Vapor Deposition (CVD) using Floating Method. 11

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The process of adsorption and desorption is studied on carbon nanotubes, and nanofibers that were produced in laboratory during this work. High quality and high purity of carbon nanotubes, and nanofibers with homogeneous diameter distribution and impurities-free were produced by the floating catalyst chemical vapor deposition (FC-CVD) method at temperatures of 1000 to 1100°C. Samples were characterized using nitrogen (N₂) adsorption at 77K, Scanning Electron Microscopy (SEM), and Transmission Electron Microscopy (TEM). From the N₂ adsorption isotherms the surface area of the adsorbent, micropore volume, and pore size were calculated. The result provided evidence that these samples have surface area ranging from 29.7 m² g^-1 to 69.2 m² g^-1).