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Novel visible-light-driven Bi 2 WO 6 -BiSIcompositeswere successfully synthesised by a facile hydrothermal method. The as-prepared nanomaterial was characterised by X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), Scanning electron microscopy (SEM) and UV-visible diffuse reflectance (UV-vis DRS). The photocatalytic degradation tetracycline (TC) experiments indicate that Bi 2 WO 6 -BiSI(170°C) had the best photocatalytic activity. The results free radical trap experiments demonstrate that h +  and  • O 2−  are the main free radicals in the photocatalytic process. And the improvement of photocatalytic performance of composite materials due to the formation of heterojunction between Bi 2 WO 6  and BiSI, which accelerates electron conduction and effectively separates photogenerated electrons and holes. Additionally, the cyclic test shows that the Bi 2 WO 6 -BiSI hybrid materials have the stable degradation ability during the photodegradation process. The unique heterojunction photocatalytic material is promising for the practical applications in remove organic pollutants to manage the environment.

Enhanced visible-light-driven photocatalytic activity of Bi 2 WO 6 -BiSI Z-scheme heterojunction photocatalysts for tetracycline degradation