The Enhanced Electrons and Holes Separation for Bi₂MoO₆/TiO₂ Z-scheme Heterojunction by Ag Loading

Abstract

The Bi₂MoO₆/TiO₂ and Bi₂MoO₆/Ag/TiO₂ composites were solvothermally synthesized and characterized by X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), and (high resolution) transmission electron microscopy ((HR)TEM). The Bi₂MoO₆/TiO₂ and Bi₂MoO₆/Ag/TiO₂ composites exhibited higher photocatalytic activity than pure Bi₂MoO₆. 100% of the RhB dye molecules could be decomposed over Bi₂MoO₆/Ag/TiO₂ composite in 120 min. The enhanced photocatalytic activity of Bi₂MoO₆/TiO₂ and Bi₂MoO₆/Ag/TiO₂ composite was attributed to the efficient separation of photoinduced electrons and holes. The mechanism for the enhanced photocatalytic activity is discussed.

Keywords

photocatalysis / Ag / heterojunction / Bi₂MoO₆/TiO₂ / photocatalytic activity