Novel Bi2S3-sensitized BiOCl with highly visible light photocatalytic activity for the removal of rhodamine B

► Bi2S3-sensitized BiOCl photocatalyst was prepared by an ion exchange method. ► RhB degradation rate over Bi2S3/BiOCl is much higher than that of BiOCl and Bi2S3. ► Bi2S3-BiOCl heterojunction facilitates the separation of photoinduced charge carrier. ► Bi2S3-photosensitization to BiOCl extends visible light responsive region.