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： An important means of achieving efficient charge separation and improving photocatalytic activity is the construction of heterostructures. In this study, the Bi 2 MoO 6 /ZnSnO 3 /ZnO heterostructure photocatalyst was synthesized by the hydrothermal method.The synthesized samples were carefully examined by X-ray photoelectron spectroscopy (XPS), X-ray diffraction (XRD), scanning electron microscope (SEM), high-resolution transmission electron microscopy (HR-TEM), photoluminescence (PL), and other analytical techniques.Meanwhile, the photocatalytic performance was further evaluated by multi-mode photocatalytic degradation with crystal violet (CV). The results show that the composite material has a relatively homogeneous cubic structure in size and shape. In the cubic structure, a heterogeneous structure exists between Bi 2 MoO 6 , ZnSnO 3 and ZnO. Simultaneously, the dramatic changes in physical morphology, such as the specific surface area and particle size of the composites, led to a unique set of properties, such as a significant climb in light absorption properties and superior photocatalytic activity. In addition, the Bi 2 MoO 6 /ZnSnO 3 /ZnO composite material shows lower photoluminescence intensity, smaller arc radius, and stronger photocurrent response compared to

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