Novel Fe 2 TiO 5 /reduced graphene oxide heterojunction photocatalyst with improved adsorption capacity and visible ligh
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RESEARCH ARTICLE
Novel Fe2TiO5/reduced graphene oxide heterojunction photocatalyst with improved adsorption capacity and visible light photoactivity: experimental and DFT approach Mohamed K. Guediri 1 & Derradji Chebli 1 & Abdallah Bouguettoucha 1
&
Riadh Bourzami 2 & Abdeltif Amrane 3
Received: 18 May 2020 / Accepted: 11 October 2020 # Springer-Verlag GmbH Germany, part of Springer Nature 2020
Abstract The design of high-efficiency materials is a major challenge for the degradation of organic pollutants. In this work, type II p-n heterojunction photocatalyst Fe2TiO5/rGO, with enhanced performance, was successfully prepared through simple process. The Fe2TiO5/rGO composites were prepared by hosting several amounts of reduced graphene oxide (rGO) into pseudobrookite nanocrystals (Fe2TiO5) which were priorly synthesized by a solid-state reaction. The morphology and the properties of the asprepared composites were characterized through different techniques. The fixation of rGO sheets on Fe2TiO5 was proved using the X-ray diffraction analysis (XRD). The results of the scanning electron microscope (SEM) analysis showed a good mixing of rGO with Fe2TiO5. The X-ray fluorescence (XRF) confirmed the purity of the pristine Fe2TiO5. The dynamic light scattering (DLS) illustrated a strong tendency to aggregation. Ultraviolet-visible diffuse reflectance spectroscopy (UV-Vis DRS) analysis was performed to characterize the electronic aspect as the gap and the Urbach energies. Finally, computational density functional theory (DFT) calculations were carried out to confirm the experimental results. The adsorptive and photoactivity of Fe2TiO5/rGO heterojunction photocatalysts were evaluated by methylene blue (MB) degradation under visible light irradiation. The highest MB degradation rate was achieved for Fe2TiO5/rGO10% photocatalyst with the highest value of the elimination rate. Keywords Fe2TiO5 . Reduced graphene oxide . Adsorption . Photocatalysis . DFT . Pollutants elimination
Introduction Responsible editor: Sami Rtimi * Abdallah Bouguettoucha [email protected] Mohamed K. Guediri [email protected] Derradji Chebli [email protected] Riadh Bourzami [email protected] Abdeltif Amrane [email protected] 1
Département de Génie des Procédés, Laboratoire de Génie des Procédés Chimiques, Faculté de Technologie, Université Ferhat Abbas Setif 1, 19000 Setif, Algeria
2
Emergent Materials Research Unit, Ferhat Abbas University Setif 1, 19000 Setif, Algeria
3
Univ Rennes, Ecole Nationale Supérieure de Chimie de Rennes CNRS, ISCR – UMR6226, F-35000 Rennes, France
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