Abstract
Adsorption properties of N 2, H 2 on SWNTs was studied by varying the KOH-modification temperature. The structure change of SWNTs through KOH-modification was investigated by using N 2 adsorption at 77 K. Hydrogen adsorption of the as-received SWNT and SWNT- x was performed using a volumetric apparatus at 77 K. The total surface area and micropore volume increased, while the average pore width, w, decreased, as the KOH-modification temperature decreased. The micropore structure in SWNTs was destroyed at high KOH-modification temperature. The amount of N 2, H 2 adsorbed depended strongly on the temperature of modification and was inversely proportional to that temperature.
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