Physico-chemical characterization and photocatalytic activity assessment under UV-A and visible-light irradiation of iron-doped TiO2 nanoparticles

• Tipo: Artigo em Revista Científica Internacional
• Data: 2023

Autores

El Mragui, A (Autor) Outra; Aadnan, I (Autor) Outra; Zegaoui, O (Autor) Outra; Joaquim C G E Esteves da Silva (Autor) FCUP

Revista

Título: Arabian Journal of Chemistry

Vol. 16

ISSN: 1878-5352

Editora: King Saud University

Indexação

ISI Web of Knowledge - 7 Citações

Scopus - 9 Citações

Outras Informações

ID Authenticus: P-00Z-8EA

DOI: 10.1016/j.arabjc.2023.105331

Abstract (EN): In this work, undoped TiO2 and Fe-doped TiO2 materials as photocatalysts for water remediation, were synthesized using wet chemical methods (sol-gel + precipitation). Their crystalline structure, optical and morphological properties were explored using X-ray diffraction (XRD), Fourier-transform infrared (FTIR) and Raman spectroscopies, UV-vis diffuse reflectance (DRS) and photoluminescence (PL) spectroscopy, X-ray photoelectron spectroscopy (XPS), and scanning electron microscopy coupled to the energy dispersive X-Ray spectroscopy (SEM-EDS). The photocatalytic performance of the synthesized materials was assessed through the degradation of methyl orange (MO) under UV-A and visible-light irradiations. The structural study showed the existence of predominate anatase phase in all synthesized nanomaterials. The optical study showed a widening of the band gap for Fe-doped TiO2 materials and revealed a decrease in charge carrier's recombination for all Fe-doped TiO2 nanomaterials compared to undoped TiO2. The morphological study confirmed the nanometric scale of the materials particles. The photocatalytic experiments revealed an enhanced photocatalytic activity of 0.5 %wt Fe-doped TiO2, only under UV-A light, compared to the rest of the prepared nanomaterials. The enhanced photocatalytic activity has been attributed to the efficient charge separation of electrons and holes.(c) 2023 Published by Elsevier B.V. on behalf of King Saud University. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 10