A series of CdS/SnO2 composite samples are prepared via in-situ deposition method,and characterized by using XRD,UV-Vis,XPS,SEM,TEM,and I-t curve.Subsequently,the prepared CdS/SnO2 composite is employed for the photocatalytic reduction of Cr(Ⅵ).Results show that compared to individual semiconductor material,the compounding between SnO2 and CdS enhances visible light absorption capacity and improves photocatalytic activity.CdS/SnO2 composite with a CdS/SnO2 mass ratio of 0.7 exhibits the optimal photocatalytic performance,over which the reduction rate of Cr(Ⅵ)approaches 100％within 10 min of illumination.Furthermore,the reduction rate of Cr(Ⅵ)over 0.7CdS/SnO2 photocatalyst remains at 99％even after the catalyst has undergone five cycles of use.Importantly,this synergistic combination also imparts superior corrosion resistance to these single semiconductor materials while simultaneously enhancing their stability.
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