Modulating photocatalytic activity of nitrogen doped TiO2 nanoparticles via magnetic field

Gómez Polo, Cristina; Cervera Gabalda, Laura María; Garayo Urabayen, Eneko; Beato López, Juan Jesús; Pérez de Landazábal Berganzo, José Ignacio

Modulating photocatalytic activity of nitrogen doped TiO2 nanoparticles via magnetic field

dc.contributor.author	Gómez Polo, Cristina
dc.contributor.author	Cervera Gabalda, Laura María
dc.contributor.author	Garayo Urabayen, Eneko
dc.contributor.author	Beato López, Juan Jesús
dc.contributor.author	Pérez de Landazábal Berganzo, José Ignacio
dc.contributor.department	Ciencias	es_ES
dc.contributor.department	Zientziak	eu
dc.contributor.department	Institute for Advanced Materials and Mathematics - INAMAT2	en
dc.contributor.funder	Universidad Pública de Navarra / Nafarroako Unibertsitate Publikoa
dc.date.accessioned	2024-10-18T09:36:01Z
dc.date.available	2024-10-18T09:36:01Z
dc.date.issued	2024-07-30
dc.date.updated	2024-10-18T09:24:27Z
dc.description.abstract	The effect of the magnetic field on the photocatalytic activity of TiO2-based nanoparticles is analyzed using a magnetically-assisted photoreactor with permanent magnets to generate a controlled uniform magnetic field, B (¿82 mT). Nitrogen doped TiO2 nanoparticles (sizes around 10 nm) were synthesized through a solvothermal method employing Ti(IV) butoxide and HNO3 (x = 0, 0.5, 1, 1.5 and 2 mL) as precursors and their structural, optical and magnetic properties were analyzed. Specifically, nitrogen doping is confirmed through Hard X-ray Photoelectron Spectroscopy (HAXPES) in those samples synthesized with low HNO3 concentrations (x = 0.5, 1). The correlation between spin polarization (magnetic susceptibility) and visible photocatalytic activity (methyl orange as a model organic pollutant) is particularly analyzed. Surprisingly, opposite effects of the magnetic field on the photocatalytic performance are found in the visible range (above 400 nm) or under UV-Vis irradiation (decrease and increase in the photocatalytic activity, respectively, under magnetic field). The Langmuir-Hinshelwood model allows us to conclude that the strong decrease in adsorption under the magnetic field (around 42 % for x = 0.5) masks the increase in the kinetic constant (close to 58 % for x = 0.5) related mainly to the effect of Lorentz forces on the reduction of the electron-hole recombination.	en
dc.description.sponsorship	The work has been performed under grant PID2020-116321RB-C21 funded by MCIN/AEI/10.13039/501100011033. Open access funding provided by Universidad Pública de Navarra.
dc.format.mimetype	application/pdf	en
dc.format.mimetype	application/msword	en
dc.identifier.citation	Gómez-Polo, C., Cervera-Gabalda, L., Garaio, E., Beato-López, J. J., Peréz-Landazábal, J. I. (2024). Modulating photocatalytic activity of nitrogen doped TiO2 nanoparticles via magnetic field. Journal of Environmental Chemical Engineering, 12(5), 1-9. https://doi.org/10.1016/j.jece.2024.113643.
dc.identifier.doi	10.1016/j.jece.2024.113643
dc.identifier.issn	2213-2929
dc.identifier.uri	https://academica-e.unavarra.es/handle/2454/52323
dc.language.iso	eng
dc.publisher	Elsevier
dc.relation.ispartof	Journal of Environmental Chemical Engineering (2024), vol. 12, núm. 5, 113643
dc.relation.projectID	info:eu-repo/grantAgreement///PID2020–116321RB-C21/
dc.relation.publisherversion	https://doi.org/10.1016/j.jece.2024.113643
dc.rights	© 2024 The Author(s). Published by Elsevier Ltd. This is an open access article under the CC BY-NC license
dc.rights.accessRights	info:eu-repo/semantics/openAccess
dc.rights.uri	https://creativecommons.org/licenses/by-nc/4.0/
dc.subject	Magnetic field	en
dc.subject	Nanoparticles	en
dc.subject	Photocatalysis	en
dc.subject	TiO2	en
dc.title	Modulating photocatalytic activity of nitrogen doped TiO2 nanoparticles via magnetic field	en
dc.type	info:eu-repo/semantics/article
dc.type.version	info:eu-repo/semantics/publishedVersion
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