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Figure 6: Changes in concentration of MB dye (a) alone, no UV irradiation, (b) alone, UV irradiation, (c) with Fe3O4/SiO2/TiO2 core-shell nanoparticles, no UV Irradiation, and (d) with Fe3O4/SiO2/TiO2 core-shell nanoparticles, UV irradiation.