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.