▎ 摘　　要

In this research, ternary magnetic TiO2/NiFe2O4/reduced graphene oxide (TiO2/NiFe2O4/rGO) nanocomposites with different amounts of graphene were synthesized using the hydrolysis method, and their photocatalytic activity was measured by degradation of methylene blue (MB) under visible light and ultraviolet (UV) irradiation. The characteristics of the samples were analyzed using FESEM/EDX, TEM, XRD, FTIR, DRS, and N-2 adsorption-desorption methods. The XRD and FESEM analyses indicated that rGO surface was covered by TiO2 and NiFe2O4 nanoparticles (NPs). According to the photocatalytic degradation tests, TiO2/NiFe2O4/rGO with the highest amount of graphene (0.120 g) exhibited good photocatalytic performance and could be easily recycled by applying an external magnetic field due to presence of NiFe2O4 NPs. We obtained 71% and 87% MB degradation under 90 min visible light and UV irradiation, respectively, in the presence of TiO2/NiFe2O4/rGO containing 0.120 g of graphene. Furthermore, we observed just a slight decline in the performance of the synthesized ternary nanocomposite containing 0.120 g of graphene after four cycles. (C) 2019 Elsevier B.V. All rights reserved.