Abstract
• Eu 2 O 3 /Co 3 O 4 nanosheets were successfully synthesized. • Eu 2 O 3 /Co 3 O 4 NSs displayed excellent catalytic performance for PMS activation toward LVX degradation. • 1 O 2 played more key role in LVX degradation than •OH, SO 4 •− and •O 2 −. • The possible mechanism and degradation pathways of LVX were cleared in detail. In this study, Eu 2 O 3 /Co 3 O 4 nanosheets (NSs) were successfully synthesized and employed to degrade levofloxacin (LVX) via peroxymonosulfate (PMS) activation. Owing to the enhanced transfer efficiency of Co 2+ /Co 3+ and more adsorbed oxygen, the obtained Eu 2 O 3 /Co 3 O 4 NSs displayed better catalytic performance for PMS activation toward LVX degradation than pure Co 3 O 4 . The Eu 2 O 3 /Co 3 O 4 NSs can remove 97.93% of LVX only in 6 min via activating PMS, with a reaction rate constant (0.2346 min −1 ) , which was 2.3 folds of single Co 3 O 4 NSs (0.1003 min −1 ). Besides, Eu 2 O 3 /Co 3 O 4 exhibited good catalytic performance in presence of different inorganic anions, satisfactory stability and reusability. Singlet oxygen ( 1 O 2 ), hydroxyl radical (•OH), sulfate radical (SO 4 •− ) and superoxide radical (•O 2 − ) contributed to LVX degradation and 1 O 2 played the most key role. In addition, based on the ROSs and LVX degradation intermediates, the possible mechanism and degradation pathways of LVX were further cleared in detail. This work can provide a reference for the eco-friendly and facile preparation strategy of efficient and stable catalysts for rapid and efficient removal of recalcitrant pollutants.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.