Catalytic use of TiO 2 nanowires in the photodegradation of Benzophenone-4 as an active ingredient in sunscreens.

Autor: Soto-Vázquez L; Nanomaterials Research Group, School of Natural Sciences and Technology, Universidad Ana G. Méndez-Gurabo Campus, PR, 00778, USA., Rolón-Delgado F; Nanomaterials Research Group, School of Natural Sciences and Technology, Universidad Ana G. Méndez-Gurabo Campus, PR, 00778, USA., Rivera K; Nanomaterials Research Group, School of Natural Sciences and Technology, Universidad Ana G. Méndez-Gurabo Campus, PR, 00778, USA., Cotto MC; Nanomaterials Research Group, School of Natural Sciences and Technology, Universidad Ana G. Méndez-Gurabo Campus, PR, 00778, USA., Ducongé J; Nanomaterials Research Group, School of Natural Sciences and Technology, Universidad Ana G. Méndez-Gurabo Campus, PR, 00778, USA., Morant C; Department of Applied Physics and Instituto Nicolás Cabrera, Universidad Autónoma de Madrid, Cantoblanco, 28049, Madrid, Spain., Pinilla S; Department of Applied Physics and Instituto Nicolás Cabrera, Universidad Autónoma de Madrid, Cantoblanco, 28049, Madrid, Spain., Márquez-Linares FM; Nanomaterials Research Group, School of Natural Sciences and Technology, Universidad Ana G. Méndez-Gurabo Campus, PR, 00778, USA. Electronic address: fmarquez@suagm.edu.
Jazyk: angličtina
Zdroj: Journal of environmental management [J Environ Manage] 2019 Oct 01; Vol. 247, pp. 822-828. Date of Electronic Publication: 2019 Jul 10.
DOI: 10.1016/j.jenvman.2019.07.005
Abstrakt: Water contamination has compromised the quality of this resource during the last years with the presence of persistent organic pollutants. Because of the resistance of these compounds to degradation, several advance oxidation techniques have been proposed. In this study, we report the employment of an advance oxidation technique in the degradation of benzophenone-4 (BP-4), using TiO 2 as catalyst, which was obtained following a fast-hydrothermal method. TiO 2 nanowires (TiO 2 NWs) were fully characterized considering the morphology, elemental composition, oxidation states, vibrational modes and crystalline structure with SEM and TEM, EDS, XPS, FTIR and XRD, respectively. The photocatalytic degradation was carried out using a home-made photoreactor under slightly acidic conditions achieving an average of 90% removal. It was determined that the photocatalysis is the most probable route of degradation since the photolysis or catalysis procedures produce negligible contributions. An apparent kinetic constant of 1.29 × 10 -2 min -1 was determined, according to a pseudo-first order reaction.
(Copyright © 2019 Elsevier Ltd. All rights reserved.)
Databáze: MEDLINE
Externí odkaz: