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Cu2O/WO3 S-scheme heterojunctions for photocatalytic degradation of levofloxacin based on coordination activation.
- Source :
-
Chemosphere . Mar2024, Vol. 352, pN.PAG-N.PAG. 1p. - Publication Year :
- 2024
-
Abstract
- Heterogeneous photocatalytic degradation of antibiotic involves the activation of antibiotic molecules and the photocatalytic oxidation process. However, the simultaneous improvement of these processes is still a challenge. Herein, S-scheme heterojunctions consisted of Cu 2 O nanocluster with defective WO 3 nanosheets were constructed for efficient photocatalytic degradation of levofloxacin (LVX). The typical CNS-5 composite (5 wt% Cu 2 O/WO 3) achieves an optimal LVX degradation efficiency of 97.9% within 80 min. The spatial charge separation and enhancement of redox capacity were realized by the formation of S-scheme heterojunction between Cu 2 O and WO 3. Moreover, their interfacial interaction would lead to the loss of lattice oxygen and the generation of W5+ sites. It is witnessed that the C–N of piperazine ring and C O of carboxylic acid in LVX are coordinated with W5+ sites to build the electronic bridge to activate LVX, greatly promoting the further degradation. This work highlights the important role of selective coordination activation cooperated with S-type heterojunctions for the photocatalytic degradation and offers a new view to understand the degradation of antibiotics at molecular level. Efficient photocatalytic degradation of LVX over CNS-5 via coordination activation [Display omitted] • Modulation of electron structure and construction of unsaturated W active sites on Cu 2 O/WO 3 S-scheme heterojunctions. • Improvement of O 2 adsorption and reduction facilitating by oxygen deficiency. • The coordination and activation of levofloxacin with active sites boosted the photodegradation performance. • The photodegradation mechanism of the synergistic effect of S-scheme heterojunction and coordination activation. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 00456535
- Volume :
- 352
- Database :
- Academic Search Index
- Journal :
- Chemosphere
- Publication Type :
- Academic Journal
- Accession number :
- 175848687
- Full Text :
- https://doi.org/10.1016/j.chemosphere.2024.141446