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Bismuth tungstate-graphitic carbon nitride (BWO/g-C₃N₄) heterojunction composites were synthesized by wet-impregnation of bulk g-C₃N₄ nanosheet with octahedron-shaped BWO, characterized and investigated for their photocatalytic capacity in the oxidative degradation of ibuprofen, under visible light irradiation. The characterization of the synthesized composites was done using X-ray diffraction, UV–Vis diffuse reflectance spectroscopy, transmission electron microscopy, high-resolution transmission electron microscopy equipped with EDS, photoluminescence spectroscopy, N₂ adsorption-desorption analysis, and thermogravimetric analysis. The synthesized heterojunction composites of different masses of BWO/g-C₃N₄ showed superior photocatalytic performance for the degradation of ibuprofen, compared to pure BWO and g-C₃N₄ nanoparticles. The photodegradation efficiency of the 7 wt% BWO/g-C₃N₄ …