Facile fabrication of fibrous Bi4Ti3O12/Bi2S3/MoS2with enhanced photocatalytic activities towards pollutant degradation under visible light irradiation

Herein, novel fibrous Bi4Ti3O12/Bi2S3/MoS(2)is constructed by a simple one-step methodology for photocatalytic degradation of RhB dyes. Bi4Ti3O12/Bi2S3/MoS(2)hybrid fibers were facilely prepared by direct hydrothermal growth of MoS(2)nanosheets on electrospun Bi(4)Ti(3)O(12)nanofiber surface, during which rod-like Bi(2)S(3)was formed by in-situ ion exchange reaction between BTO and S source. The MoS(2)nanosheets with several-layer thickness uniformly are coated both on the BTO and Bi(2)S(3)surface. Remarkable enhancement of visible light absorption and photo-generated charge separation in Bi4Ti3O12/Bi2S3/MoS(2)are achieved compared with the bare BTO nanofibers. By changing the weight ratio of Mo/S and the precursor dosage of MoS2, the optimized BM-150/250 sample presents 2.3 and 4.1 times higher of the photodegradation efficiency and apparent reaction rate constant, respectively, than that of pure BTO fibers after 120-min irradiation under visible light. The system pays an efficient pathway to establish ternary composite fibers providing high photocatalytic activity for other electrospun Bi-contained nanofibers.