Abstract
Activated carbon is a unique material, because of huge capacity for adsorption from gas and liquid phases. Promising results are obtained using activated carbons as hydrogen sorbents in electrochemical storage. Raman spectroscopy is widely used for characterization of carbonaceous materials (CM). CM investigated in current work were obtained from parent, vegetable organisms (coconut shell and tamarind seeds) via carbonization then subjected to activation. Obtained Raman spectra were analyzed by generalized 2D correlation method based on the Noda's approach [19,20] taking activation time as an external stimulus. 2D correlation spectroscopy shows the presence of different CM phases, not only differentiating between phases but also seems to distinguish forms within certain carbonaceous phases. Versatility of CM phases arises from the different ratio of sp2 (graphitelike) to sp3 (diamondlike) bonds.
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