光催化
X射线光电子能谱
兴奋剂
硫脲
可见光谱
材料科学
吸收边
漫反射红外傅里叶变换
扫描电子显微镜
硫黄
漫反射
光化学
吸收(声学)
光谱学
分析化学(期刊)
化学
光学
光电子学
带隙
催化作用
物理
有机化学
核磁共振
复合材料
冶金
量子力学
作者
Shende Jiang,Liang Wang,Weichang Hao,Wenxian Li,Hui-Ju Xin,Wenwen Wang,Tianmin Wang
摘要
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.
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