Abstract
In this paper, novel WS(2)/Bi(2)MoO(6) heterostructured photocatalysts were successfully fabricated via a facile solvothermal growth method using pre-exfoliated layered WS(2) nanoslices as a substrate. The structure, morphology, and optical properties of the as-prepared WS(2)/Bi(2)MoO(6) samples were characterized by XRD, XPS, SEM, TEM (HRTEM), and UV-vis diffuse reflectance spectra (DRS). Results confirmed the existence of an excellent nanojunction interface between layered WS(2) nanoslices and Bi(2)MoO(6) nanoflakes. Under visible light (>420 nm), the WS(2)/Bi(2)MoO(6) composites exhibit significantly enhanced photocatalytic activity compared with pure Bi(2)MoO(6) toward the decomposition of rhodamine B (RhB). Meanwhile, the active species trapping experiments indicated that holes (h(+)) were the main active species during the photocatalytic reaction. The enhanced photocatalytic performance can be ascribed to the effective light harvesting, fast photogenerated electron-hole pairs separation, and excellent charge carrier transport of the WS(2)/Bi(2)MoO(6) heterostructures. Moreover, the prepared WS(2)/Bi(2)MoO(6) composites also show good structural and activity stability in repeatability experiments.