In this work, the mesoporous carbon (MC) of the ordered structure was synthesized using silica (SBA-15) as a
template and glucose as a carbon precursor. The received MC was subjected to wet oxidation in nitric acid and
thermal treatment at 150, 400, 600 and 800 ◦C to differ its hydrophobic/hydrophilic character. The obtained
unmodified (MC), oxidized (MC-OX) and thermally modified oxidized carbon (MC-OX-150, MC-OX-400, MC-OX-
600 and MC-OX-800) were investigated by various techniques: transmission electron microscopy (TEM), scanning
electron microscopy (SEM), and low-temperature nitrogen adsorption to characterize material porosity, Xray
photoelectron spectroscopy (XPS) and suspension potentiometric titration (SPT) to provide the statement of
quality and quantity of groups presented onto the surface and the surface charge, and dielectric spectroscopy
(DS) and differential scanning calorimetry (DSC) to register the changes in the water melting processes in carbon
pores. The DS and DSC studies revealed the correlation between the water melting temperature inside the pores
of MCs and their chemical characteristics, which were determined mainly by surface functional groups and only
slightly by textural properties.