光催化
锐钛矿
罗丹明B
兴奋剂
带隙
材料科学
可见光谱
光化学
紫外线
水溶液
辐照
价(化学)
化学工程
纳米技术
光降解
X射线光电子能谱
降级(电信)
光电子学
漫反射红外傅里叶变换
化学
催化作用
物理化学
物理
有机化学
核物理学
生物化学
作者
Wei Xie,Rui Li,Qingyu Xu
标识
DOI:10.1038/s41598-018-27135-4
摘要
Anatase TiO2 is a typical photocatalyst, and its excellent performance is limited in ultraviolet light range due to its wide band gap of 3.2 eV. A series of Se-doped TiO2 nanoparticles in anatase structure with various Se concentrations up to 17.1 at.% were prepared using sol-gel method. The doped Se ions are confirmed to be mainly in the valence state of + 4, which provides extra electronic states in the band gap of TiO2. The band gap is effectively narrowed with the smallest gap energy of 2.17 eV, and the photocatalytic activity is effectively improved due to the extended absorption range. The photocatalytic activity was evaluated by the degradation of Rhodamine B (RhB) in aqueous solution under visible light irradiation. The results show that Se doping significantly improves the photocatalytic activity of TiO2 and 13.63 at.% Se-doped TiO2 has the best performance.
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