10.1021/jp5117036.s001 Shiqi Jiang Shiqi Jiang Liang Wang Liang Wang Weichang Hao Weichang Hao Wenxian Li Wenxian Li Huiju Xin Huiju Xin Wenwen Wang Wenwen Wang Tianmin Wang Tianmin Wang Visible-Light Photocatalytic Activity of S‑Doped α‑Bi<sub>2</sub>O<sub>3</sub> American Chemical Society 2015 light range scanning electron microscope Bi site S doping photocatalytic degradation reflectance spectrophotometer sulfur source O site S atom substitutes S substitution chemical preparation method 2O UV 2015-06-25 00:00:00 Journal contribution https://acs.figshare.com/articles/journal_contribution/Visible_Light_Photocatalytic_Activity_of_S_Doped_Bi_sub_2_sub_O_sub_3_sub_/2154820 A batch of S-doped α-Bi<sub>2</sub>O<sub>3</sub> and pure α-Bi<sub>2</sub>O<sub>3</sub> were prepared by a simple chemical preparation method using thiourea as sulfur source, and the S-doped α-Bi<sub>2</sub>O<sub>3</sub> 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-Bi<sub>2</sub>O<sub>3</sub> and pure α-Bi<sub>2</sub>O<sub>3</sub>. The possible mechanism for the enhancement of visible-light photocatalysis by S doping is proposed in terms of both experimental results and calculations.