Pore structures of activated carbon fibers from organometallics/pitch composites by nitrogen adsorption

A series of activated carbon fibers (ACFs) produced from organometallics co mpounds such as Y(acac)(3) or Al(acac)(3)/pitch composites were characteriz ed. The pore-size, surface stale and graphitic crystallite size were examin ed by means of N-2 adsorption isotherm, X-ray photoelectron spectroscopy an d X-ray diffraction (XRD) analysis. The presence of Y or Al increased the p ore-size. Y(acac)(3)/pitch and Al(acac)(3)/pitch-based ACFs activated at 11 48 and 1173 K, respectively, had an appreciable amount of mesopores. The si ze of the micrographites structure of the organometallics/pitch-based ACF c omposites by XRD was slightly greater than that of the pitch-based ACF. Ar ion etching using X-ray photoelectron spectroscopy showed that Y or Al atom s are coated with carbon layers. (C) 1998 Elsevier Science Ltd. All rights reserved.