光催化
光降解
罗丹明B
光化学
锐钛矿
兴奋剂
材料科学
纳米颗粒
氧气
掺杂剂
氢
可见光谱
无机化学
化学工程
化学
催化作用
纳米技术
有机化学
光电子学
工程类
作者
Yin Zhao,Chunzhong Li,Xiuhong Liu,Feng Gu,Hua-yun Du,Liyi Shi
标识
DOI:10.1016/j.apcatb.2007.09.044
摘要
Zn-doped TiO2 nanoparticles with high photocatalytic activity were synthesized by the hydrogen–oxygen diffusion flame method and the photocatalytic degradation mechanism of rhodamine B dye under visible light irradiation were elaborated. The Zn dopants presented in the form of small ZnO nuclei dispersing randomly on the surface of anatase TiO2 nanoparticles. It is found that the photosensitized degradation activity can be enhanced by doping an appropriate amount of Zn. The improved activity by Zn doping can be attributed to the appropriate energetic position between ZnO and the excited state of dye, which enhanced the electron injection into the conduction band of TiO2 by capturing electron, subsequently promoted the formation of reactive oxygen species. Hence, the enhanced photodegradation of dyes under visible irradiation can be realized.
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