The photocatalytic activity was determined by measuring the rate of CR decolorisation in an aqueous solution under simulated solar light irradiation. Dhiman et al. created a combination of mixed-spinel ferrite and g-C3N4 to remove antibiotic pollutants from wastewater. The procedure consisted of three continuous steps: pyrolysis, solution combustion, mechanical grinding, and annealing, which were used to produce a Z-scheme g-C3N4/Ni0.5Zn0.5Fe2O4 nano heterojunction. The photocatalyst that was created was assessed for its capacity to break down the Doxycycline medication using natural sunlight. The heterojunction had a peak deterioration efficiency of 97.10% during a 60-minute evaluation. The higher photodegradation efficiency was a result of the greater redox capacity and separation of photoinduced charges facilitated by the Z-scheme heterojunction between g-C3N4 and Ni-Zn ferrite. Wabaidur et al. have developed a new NC that effectively eliminates cationic MB and celestine blue (CB) dyes from water. The NC, consisting of silica-coated CuFe2O4-decorated oxidised MWCNTs (CuFe2O4/oMWCNTs), was synthesized via co-precipitation and hydrothermal processes. The regeneration studies showed that the highest recovery of CB was obtained using acetonitrile (ACN), while complete recovery of MB was using methanol (MeOH). The CuFe2O4/oMWCNTs NC is an exceptionally excellent adsorbent for rapidly and effectively decolorizing wastewater that contains cationic dyes. Table . Spinel metal ferrites with fullerene-based compounds and carbon composite-based materials are used for the efficient removal of toxic pollutants from wastewater. 8 (ZnFe2O4/rGO).