“…To the group of photocatalytic nanomaterials that have been applied for the treatment of wastewater belong titanium dioxide (TiO 2 ), bismuth ferrite (BiFeO 3 ), zinc oxide (ZnO), cupric oxide (CuO), graphitic carbon nitride (g-C 3 N 4 ), and reduced graphene oxide (rGO). Various forms of core-shell nanoparticles can be distinguished such as spherical, nanomatryushka, multiple cores in a single shell, hexagonal, and movable cores with hollow shells [53][54][55][56][57][58][59][60][61]. However, other nanostructures have also been studied for these applications (i.e., silver halides, phosphates, metal sulfides (i.e., CdS), porphyrins (Pp), and their derivatives or carbonaceous materials like carbon nanotubes (CNT) and heteroatom doped graphene [62][63][64][65]).…”