Visible-light photocatalytic activity of S-doped α-Bi2O3

Shiqi Jiang, Liang Wang, Weichang Hao, Wenxian Li, Huiju Xin, Wenwen Wang, Tianmin Wang

    Research output: Contribution to journalArticlepeer-review

    Abstract

    A batch of S-doped α-Bi2O3 and pure α-Bi2O3 were prepared by a simple chemical preparation method using thiourea as sulfur source, and the S-doped α-Bi2O3 samples promoted the activity in the visible light range in terms of photocatalytic degradation of RhB. The photocatalysts were characterized by X-ray diffraction, scanning electron microscope, UV-vis diffuse reflectance spectrophotometer, X-ray photoelectron spectroscopy, and X-ray absorption near-edge structure. It is surprisingly found that the S atom substitutes on the Bi site rather than substituting on the O site. Further work on the first-principle calculations confirms the S substitution and reflects the differences of electronic structures between S-doped α-Bi2O3 and pure α-Bi2O3. The possible mechanism for the enhancement of visible-light photocatalysis by S doping is proposed in terms of both experimental results and calculations.
    Original languageEnglish
    Pages (from-to)14094-14101
    Number of pages8
    JournalJournal of Physical Chemistry C
    Volume119
    Issue number25
    DOIs
    Publication statusPublished - 2015

    Keywords

    • electronic structure
    • light
    • photocatalysis
    • scanning electron microscopy

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