Enhanced Photocatalytic Activity of Bi_(24)O_(31)Br_(10): Constructing Heterojunction with BiOI

摘要

Bismuth-based compounds have been regarded as an important class of visible-light photocatalysts due to their special electronic structures. In this paper, iodide ions are introduced to modify bismuth-based compound, Bi_(24)O_(31)Br_(10), forming a Bi_(24)O_(31)Br_(10)/BiOI heterojunction structure. A significant enhancement of photocatalytic activity compared to the parent compounds is observed in de-coloration of rhodamine B(Rh.B) solution. The improved photocatalytic property of Bi_(24)O_(31)Br_(10)/BiOI heterojunction is ascribed to the unique electronic structure consisting of complementary band structures of BiOI and Bi_(24)O_(31)Br_(10).Iodide ions are regarded as an effective reagent to construct bismuth-based photocatalytic heterojunctions with improved photocatalytic activity.