Constructing two-dimension MoS 2 /Bi 2 WO 6 core-shell heterostructure as carriers transfer channel for enhancing photocatalytic activity

A MoS2/Bi2WO6 core-hell heterostructure constructed by two-dimension MoS2 and BiWO6 nanoparticles was obtained though a simple hydrothermal reaction and the photocatalytic activity was compared. The HRTEM images show that the two-dimension MoS2 grown on the surface of Bi2WO6 nanoparticles to construct a core-shell heterostructure. In the photocatalytic degradation of dye, MoS2/Bi2WO6 composite with optimal Mo:Bi ratio demonstrated an obvious enhancement of photocatalytic activity as much as 82% than that of pristine Bi2WO6 nanoparticles. The result confirms this MoS2/Bi2WO6 core-hell heterostructure is an ideal transfer channel for photo-induced carriers. In this way, photo-induced electrons produced in MoS2 will flow to Bi2WO6; thus, photo-induced holes produced in Bi2WO6 will transfer to MoS2. This carriers' transfer will improve the separation efficiency and enhance the photocatalytic activity of composites. This two-dimension MoS2 composite is finally confirmed an effective approach to improve the photocatalytic activity of semiconductors.