Products of resorcinol-formaldehyde resin carbonization (chars)
are characterized by different morphology (particle shape and sizes) and
texture (specific surface area, pore volume and pore size distribution)
depending on water content during resin polymerization. At a low amount
of water (Cw = 37.8 wt.%) during synthesis resulting in
strongly cross-linked polymers, carbonization gives nonporous particles.
An increase in the water content to 62.7 wt.% results in a
nano/mesoporous char, but if Cw = 73.3 wt.%, a char is purely
nanoporous. Despite these textural differences, the Raman spectra of all
the chars are similar because of the similarity in the structure of
their carbon sheets with a significant contribution of sp3 C
atoms. However, the difference in the spatial organization of the carbon
sheet stacks in the particles results in the significant differences in
the textural and morphological characteristics and in the adsorption
properties of chars with respect to water, methane, benzene, hydrogen,
methylene chloride, and dimethylsulfoxide.