Solar-driven photocatalytic treatment of diclofenac using immobilized TiO2-based zeolite composites |
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| Authors: | Marin Kovacic Subhan Salaeh Hrvoje Kusic Andraz Suligoj Marko Kete Mattia Fanetti Urska Lavrencic Stangar Dionysios D. Dionysiou Ana Loncaric Bozic |
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| Affiliation: | 1.Faculty of Chemical Engineering and Technology,University of Zagreb,Zagreb,Croatia;2.Laboratory for Environmental Research,University of Nova Gorica,Nova Gorica,Slovenia;3.Laboratory for Inorganic Chemistry and Technology,National Institute of Chemistry,Ljubljana,Slovenia;4.Materials Research Laboratory,University of Nova Gorica,Ajdovscina,Slovenia;5.Environmental Engineering and Science Program,University of Cincinnati,Cincinnati,USA |
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| Abstract: | The study is aimed at evaluating the potential of immobilized TiO2-based zeolite composite for solar-driven photocatalytic water treatment. In that purpose, TiO2-iron-exchanged zeolite (FeZ) composite was prepared using commercial Aeroxide TiO2 P25 and iron-exchanged zeolite of ZSM5 type, FeZ. The activity of TiO2-FeZ, immobilized on glass support, was evaluated under solar irradiation for removal of diclofenac (DCF) in water. TiO2-FeZ immobilized in a form of thin film was characterized for its morphology, structure, and composition using scanning electron microscopy/energy-dispersive x-ray spectroscopy (SEM/EDX). Diffuse reflectance spectroscopy (DRS) was used to determine potential changes in band gaps of prepared TiO2-FeZ in comparison to pure TiO2. The influence of pH, concentration of hydrogen peroxide, FeZ wt% within the composite, and photocatalyst dosage on DCF removal and conversion efficiency by solar/TiO2-FeZ/H2O2 process was investigated. TiO2-FeZ demonstrated higher photocatalytic activity than pure TiO2 under solar irradiation in acidic conditions and presence of H2O2. |
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