Publication: Spectroscopic investigations of sequential nitric acid treatments on activated carbon

The following manuscript was published in the journal Carbon in 2013. This study outlines the process by which implemented surface oxygen groups polarizes pi-bond density on the surface of activated carbon. Adsorbed¬†surface oxygen groups break carbon surface bonds as they chemically attach, and their electron-withdrawing effects transform 6-fold aromatic ring pi-bond density into surface-conjugated olefin-type pi-bonds. The overall effect of such a process is a strengthening effect (blue shifting) for both near-surface olefin and 6-fold aromatic pi-bonds which further enables a higher graphitic order (lower I(D):I(G)) of the carbon substrate. Structure/function relationships are displayed between DRIFTS and Raman results that implicate the same surface oxygen group induced mechanism of chemical graphitization outlined the subsequent publication “Partial Graphitization of Activated Carbon by Surface Acidification”.

Spectroscopic investigations of sequential nitric acid treatments on granulated AC–Effects of surface oxygen groups on pi density