Enhanced Photocatalytic Activity of Bi₂₄O₃₁Br₁₀: Constructing Heterojunction with BiOI

Xi Lou¹，Jun Shang²，Liang Wang¹，Haifeng Feng³，Weichang Hao^1,3，Tianmin Wang¹，Yi Du³

1. Center of Material Physics and Chemistry, Beihang University2. College of Physics and Electronic Engineering, Henan Normal University3. Institute for Superconducting and Electronic Materials (ISEM), University of Wollongong

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, Bi₂₄O₃₁Br₁₀, forming a Bi₂₄O₃₁Br₁₀/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 Bi₂₄O₃₁Br₁₀/BiOI heterojunction is ascribed to the unique electronic structure consisting of complementary band structures of BiOI and Bi₂₄O₃₁Br₁₀.Iodide ions are regarded as an effective reagent to construct bismuth-based photocatalytic heterojunctions with improved photocatalytic activity.

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