Synthesis, characterization, and photocatalytic performance of FeTiO3/ZnO on ciprofloxacin degradation

[Display omitted] •CPX was completely degraded using FeTiO3/ZnO under UV-Vis irradiation.•h+ and OH reactive species were responsible for the degradation and mineralization of CPX.•FeTiO3/ZnO heterojunction, Fe2O3 impurities, and oxygen-vacancies suppressed e−/h+ recombination enhancing CPX minerali...

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Published in:Journal of photochemistry and photobiology. A, Chemistry. Chemistry., 2021-04, Vol.411, p.113186, Article 113186
Main Authors: Núñez-Salas, Raisa Estefanía, Hernández-Ramírez, Aracely, Santos-Lozano, Verónica, Hinojosa-Reyes, Laura, Guzmán-Mar, Jorge Luis, Gracia-Pinilla, Miguel Ángel, Maya-Treviño, María de Lourdes
Format: Article
Language:English
Subjects:
Ciprofloxacin
FeTiO3
Heterojunction
Photocatalysis
Ultrasound-assisted
ZnO
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Summary:[Display omitted] •CPX was completely degraded using FeTiO3/ZnO under UV-Vis irradiation.•h+ and OH reactive species were responsible for the degradation and mineralization of CPX.•FeTiO3/ZnO heterojunction, Fe2O3 impurities, and oxygen-vacancies suppressed e−/h+ recombination enhancing CPX mineralization. The catalyst FeTiO3/ZnO was prepared by ultrasound-assisted chemical precipitation method. The material was characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM-EDAX), transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS), UV-Vis diffuse reflectance spectroscopy (DRS), and photoluminescence spectroscopy (PL). FeTiO3/ZnO (1, 5, and 10%wt. FeTiO3) was evaluated on photocatalytic degradation of ciprofloxacin (CPX) in an aqueous solution (10 mg L−1) under UV-Vis irradiation. The heterojunction between FeTiO3 and ZnO, the presence of Fe2O3 impurities, and the formation of oxygen vacancies allowed the coupled material FeTiO3/ZnO (1%wt.) showed a better photocatalytic performance (100% degradation CPX and 27% of mineralization) than bare ZnO. Although ZnO also attained complete degradation of CPX, the antibiotic was not mineralized under the same operating conditions. A scavenger study determined that h+ and OH were the principal reactive species involved in the CPX photocatalytic degradation. The heterostructured material showed high stability and reusability during three cycles of use.
ISSN:1010-6030
1873-2666
DOI:10.1016/j.jphotochem.2021.113186