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This study investigates photocatalytic degradation performance of Fe₃O₄/TiO₂ nanoparticles (NPs) green-synthesized using Moringa oleifera leaf extract. A coprecipitation synthesis method was successfully used to synthesize NPs of various concentrations and the magnetic properties of the photocatalyst was further explored so that it could be reused. X-ray diffraction and selected area electron diffraction showed that TiO₂ has a tetragonal structure and Fe₃O₄ has an inverse spinel cubic structure. The prepared transmission electron microscopy image of Fe₃O₄/TiO₂ showed that it was almost spherical, not uniform, and slightly dispersed under agglomerated conditions due to the presence of a TiO₂ boundary. Besides, the chemical elements are confirmed by energy-dispersive X-ray spectroscopy. Fourier-transform infrared spectra showed functional groups namely C–H, Cdouble bondO, Cdouble bondC, and C–N …