Small-angle scattering was measured from activated carbon monoliths prepared from three different wood species (European beech, Pedunculate oak and Norwegian spruce). Substantial differences were found in the scattering images of axial and tangential slices, attributed to their characteristic phytogenic structures. The decrease in anisotropy in the nanostructured carbon matrix due to the activation process is also different among the three investigated types of wood. For quantitative characterization of the anisotropy and its decrease, the degree of alignment was calculated from the azimuthal scattering curves. A simple numeric model was constructed on the basis of direct information obtained by atomic force microscopy. Scattering patterns calculated from the model were compared with the experimental ones to explain the possible structural changes in the carbon skeleton.
|Original language||English (US)|
|Number of pages||14|
|State||Published - Oct 2011|
Bibliographical noteFunding Information:
The underlying experimental measurements at Helmholtz-Zentrum Berlin, Electron storage ring BESSY were supported by the Seventh Framework Programme of the European Community (FP7/2007–2013) under Grant Agreement No. 226716 . Measurements at HASYLAB/DESY were supported by Grant Agreement II-20080222 EC. We thank Prof. K. László for the possibility of adsorption measurements and Ms. E. Fülöp for the invaluable help in carrying them out. We would like to express our gratitude to Ms. K. Papp for the SEM images.