Carbon-based nanomaterials (which have unique π-electronic
structure) have been used as excellent adsorbents for the removal
of aromatic compounds, an area that has become a hot research
topic; RGO/iron oxide composites were prepared to adsorb
1-naphthylamine, 1-naphthol and naphthalene with different
polarities.35 Electron donor–acceptor interaction was proposed
to be the primary mechanism and the adsorption capacity
increased with increasing dipole moment. Thermodynamic
experiments further indicated that the process was endothermic
and spontaneous.