光降解
光催化
辐照
可见光谱
降级(电信)
矿化(土壤科学)
化学
材料科学
催化作用
光化学
光电子学
有机化学
核物理学
物理
电信
氮气
计算机科学
作者
Suqing Wu,Haiyang Hu,Yan Lin,Junliang Zhang,Yun Hang Hu
标识
DOI:10.1016/j.cej.2019.122842
摘要
TiO2 is widely exploited as a photocatalyst to degrade antibiotic residues in water under UV irradiation, but it is inefficient for visible light photocatalysis due to its large band gap. Herein, it is the first time to report the photodegradation of tetracycline (TC) over TiO2 under visible light irradiation. 25.1% of removal efficiency for TC was achieved even under 700 nm light irradiation. Furthermore, it was demonstrated that O2− species, which were generated from photoexciting of a surface complex between TC molecules and TiO2, played a critical role in the visible light photocatalytic degradation of TC. In addition, it was found that the visible light photocatalytic degradation generated different active species and intermediate products from those under UV irradiation. N-doped TiO2 exhibited even better performance for visible-light photocatalytic degradation of TC with higher removal efficiency and larger mineralization rate, which followed different degradation-mechanism.
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