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A self-circulating cerium-rich CeO2-x/Bi2MoO6 heterojunction catalyst for boosting photo-Fenton degradation of fluoroquinolone antibiotics by Gui Yang; Yujun Liang; Han Zheng; Jian Yang; Sheng Guo; Huogen Yu is a Engineering article available to read on EtoBox.

What is A self-circulating cerium-rich CeO2-x/Bi2MoO6 heterojunction catalyst for boosting photo-Fenton degradation of fluoroquinolone antibiotics about?

Stoichiometric CeO 2 as a Fenton-like cocatalyst generally suffers from low H 2 O 2 activation efficiency and multitudinous metal leaching because of its sluggish circulation of Ce 3+ /Ce 4+ redox couple. Herein, a ceriumrich non-stoichiometric CeO 2-x cocatalyst was developed to accelerate the circulation of Ce 3+ /Ce 4+ , which greatly promoted the H 2 O 2 activation and avoided the production of metal sludge. In this case, cerium-rich CeO 2- x nanodots were perfectly anchored onto Bi 2 MoO 6 nanosheets to fabricate a self-circulating CeO 2-x /Bi 2 MoO 6 (CEO/BIM) photo-Fenton system. Systematic studies showed that the optimized CEO/BIM-3 (the mole ratio of Ce to Bi was 0.75) sample manifested the highest photo-Fenton degradation rate (0.026 min -1 ) of ofloxacin (OX) only under 5 W white LED irradiation, which was 8.66 and 6.50 times that of individual Bi 2 MoO 6 and CeO 2-x , respectively. The enhanced performance was mainly attributed to the excellent and continuous circulation of Ce 3+ /Ce 4+ , which can greatly accelerate the H 2 O 2 activation to produce more • OH radicals. This study demonstrates the great potential of the self-circulating photo-Fenton system in degrading

Who reads A self-circulating cerium-rich CeO2-x/Bi2MoO6 heterojunction catalyst for boosting photo-Fenton degradation of fluoroquinolone antibiotics?

Author

Gui Yang; Yujun Liang; Han Zheng; Jian Yang; Sheng Guo; Huogen Yu

Publisher

Elsevier BV

Published

2023

Language

EN

Field

Engineering (Physical Sciences)