Effect of heat treatment on the photocatalytic activity of α-Fe 2 O 3 nanoparticles: towards diclofenac elimination.

Autor: Mimouni I; Spectroscopy, Molecular Modeling, Materials, Nanomaterials, Water, and Environment Laboratory, Faculty of Sciences, Mohammed V University, Rabat, Morocco., Bouziani A; Chemical Engineering Department, Middle East Technical University, Ankara, Turkey. asmae@metu.edu.tr., Naciri Y; Laboratory of Materials and Environment, Faculty of Sciences, Ibn Zohr University, Agadir, Morocco., Boujnah M; Instituto de Investigaciones en Materiales, Universidad Nacional de Autónoma de México, A. P, 04510, Mexico City, Mexico., El Belghiti MA; Spectroscopy, Molecular Modeling, Materials, Nanomaterials, Water, and Environment Laboratory, Faculty of Sciences, Mohammed V University, Rabat, Morocco., El Azzouzi M; Spectroscopy, Molecular Modeling, Materials, Nanomaterials, Water, and Environment Laboratory, Faculty of Sciences, Mohammed V University, Rabat, Morocco.
Jazyk: angličtina
Zdroj: Environmental science and pollution research international [Environ Sci Pollut Res Int] 2022 Jan; Vol. 29 (5), pp. 7984-7996. Date of Electronic Publication: 2021 Sep 05.
DOI: 10.1007/s11356-021-16146-w
Abstrakt: α-Fe 2 O 3 nanoparticles were synthesized via a straightforward method. XRD, FTIR, SEM, ESR, and DRS techniques investigated the influence of various calcination temperatures on the crystal structure, optical, and photocatalytic properties of the samples. The obtained results demonstrated that the average crystallite size increased with the increase in the calcination temperature. Measured and computed optical properties were in accordance and the bandgap energy decreased with the increase in the calcination temperature. The highest photocatalytic degradation efficiency for diclofenac (DCF) was obtained with the sample calcinated at 300 °C (96%). The photocatalytic process occurs because of the presence of OH• radicals. The addition of H 2 O 2 led to the inhibition of OH• radicals that H 2 O 2 scavenged.
(© 2021. The Author(s), under exclusive licence to Springer-Verlag GmbH Germany, part of Springer Nature.)
Databáze: MEDLINE
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