Characterization of Pore-Size in Activation Carbons by Small-Angle X-Ray-Scattering

Small-Angle X-Ray Scattering (SAXS) studies have been carried out over a wide range of Q-values (5 x 10(-3) - 0.5 Angstrom(-1)) permitting analysis of structural features for a spatial regime of 0.5-200 nm. Experimental and analysis procedures are described and results presented for a series of activated carbons. It is found that the pore size distribution has a complex form that varies according to the degree of activation (burn-off). Additional measurements have been made by neutron diffraction. The results demonstrate the basic graphitic structure of the carbons but show that there is considerable distortion of lattice planes.