Facile fabrication of fibrous Bi4Ti3O12/Bi2S3/MoS2 with enhanced photocatalytic activities towards pollutant degradation under visible light irradiation

Abstract

Herein, novel fibrous Bi4Ti3O12/Bi2S3/MoS2 is constructed by a simple one-step methodology for photocatalytic degradation of RhB dyes. Bi4Ti3O12/Bi2S3/MoS2 hybrid fibers were facilely prepared by direct hydrothermal growth of MoS2 nanosheets on electrospun Bi4Ti3O12 nanofiber surface, during which rod-like Bi2S3 was formed by in-situ ion exchange reaction between BTO and S source. The MoS2 nanosheets with several-layer thickness uniformly are coated both on the BTO and Bi2S3 surface. Remarkable enhancement of visible light absorption and photo-generated charge separation in Bi4Ti3O12/Bi2S3/MoS2 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.

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Acknowledgements

This work was supported by the National Natural Science Foundation of China (21501140, 21403165) and Outstanding Youth Science Fund of Xi'an University of Science and Technology (2019YQ2-06).

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Correspondence to Jun Liu or Meng-Jie Chang.

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Liu, J., Hui, Q., Chang, MJ. et al. Facile fabrication of fibrous Bi4Ti3O12/Bi2S3/MoS2 with enhanced photocatalytic activities towards pollutant degradation under visible light irradiation. J Mater Sci: Mater Electron 31, 17688–17702 (2020). https://doi.org/10.1007/s10854-020-04324-4

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