Enhanced photocatalytic performance of colored Ti 2 O 3 -Ti 3 O 5 -TiO 2 heterostructure for the degradation of antibiotic ofloxacin and bactericidal effect.

Autor: Figueroa-Torres MZ; Universidad Autónoma de Nuevo León, UANL, Facultad de Ingeniería Civil, San Nicolás de los Garza, Nuevo León, 66455, Mexico. Electronic address: mayra.figueroatrr@uanl.edu.mx., Meneses-Rodríguez D; CONAHCYT-Departamento de Física Aplicada, CINVESTAV-IPN, Antigua Carretera a Progreso km 6, Mérida, Yucatán, 97310, Mexico. Electronic address: dmeneses@cinvestav.mx., Obregón S; Universidad Autónoma de Nuevo León, UANL, CICFIM-Facultad de Ciencias Físico Matemáticas, Av. Universidad S/N, San Nicolás de los Garza, Nuevo León, 66455, Mexico. Electronic address: sergio.obregonal@uanl.edu.mx., Cano A; Solid State Electronics Section, Electrical Engineering Department, Center for Research and Advanced Studies of the National Polytechnic Institute, 07360, Mexico City, Mexico. Electronic address: arely.cano.m@cinvestav.mx., Vázquez A; Universidad Autónoma de Nuevo León, UANL, Facultad de Ciencias Químicas, Av. Universidad S/N, San Nicolás de los Garza, Nuevo León, 66455, Mexico. Electronic address: alejandro.vazquezdm@uanl.edu.mx., Hernández-Adame L; CONAHCYT-Centro de Investigaciones Biológicas del Noroeste (CIBNOR), Av. Instituto Politécnico Nacional 195, Playa Palo de Santa Rita Sur, La Paz, B.C.S., 23096, Mexico. Electronic address: ladame@cibnor.mx., Ruiz-Gómez MA; CONAHCYT-Departamento de Física Aplicada, CINVESTAV-IPN, Antigua Carretera a Progreso km 6, Mérida, Yucatán, 97310, Mexico; División de Ciencias Ambientales, Instituto Potosino de Investigación Científica y Tecnológica, A.C. Camino Presa San José 2055, Lomas 4a Sección, San Luis Potosí, S.L.P., 78216, Mexico. Electronic address: miguel.ruiz@ipicyt.edu.mx.
Jazyk: angličtina
Zdroj: Chemosphere [Chemosphere] 2024 Oct; Vol. 365, pp. 143247. Date of Electronic Publication: 2024 Sep 03.
DOI: 10.1016/j.chemosphere.2024.143247
Abstrakt: Removing emergent contaminants, such as pharmaceuticals, and inhibiting bacteria by photocatalysis represents an interesting alternative for water remediation. We report the effective preparation of colored powders containing Ti 2 O 3 , Ti 3 O 5 , and TiO 2 , by a simple thermal oxidation reaction of a Ti 2 O 3 precursor from 400 °C to 800 °C. The material obtained at 500 °C (P500 sample) exhibited the highest photocatalytic performance under simulated solar light, reaching 54% degradation of antibiotic ofloxacin and a bacteria inactivation of 51% and 62% for Escherichia coli (E. coli) and Staphylococcus aureus (S. aureus), respectively. The superoxide anion radical was the main specie contributing to the photodegradation of ofloxacin, while the hydroxyl radical showed negligible effect. A synergy between the physicochemical properties of the phases in the P500 sample contributes to the electrons transfer, visible light absorption capability and generation of reactive oxygen species, resulting in its remarkable photoactivity. The comparison in terms of surface-specific activity revealed that the P500 sample is more efficient than commercially available TiO 2 P25. This fact opens the option of using commercially available Ti 2 O 3 and TiO 2 P25 to obtain composites for promoting photoinduced reactions using natural solar light.
Competing Interests: Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.
(Copyright © 2024 Elsevier Ltd. All rights reserved.)
Databáze: MEDLINE
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