Visible light photocatalytic degradation of tetracycline over TiO2
Document Type
Article
Publication Date
2-15-2020
Department
Department of Materials Science and Engineering
Abstract
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.
Publication Title
Chemical Engineering Journal
Recommended Citation
Wu, S.,
Hu, H.,
Lin, Y.,
Zhang, J.,
&
Hu, Y. H.
(2020).
Visible light photocatalytic degradation of tetracycline over TiO2.
Chemical Engineering Journal,
382.
http://doi.org/10.1016/j.cej.2019.122842
Retrieved from: https://digitalcommons.mtu.edu/michigantech-p/1207