engleski

Solar-driven photocatalytic treatment of diclofenac using immobilized TiO2-based zeolite composites

The study is aimed at evaluating the potential of immobilized TiO2-based zeolite composite for solar driven photocatalytic water treatment. In that purpose, TiO2-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.

photocatalysis ; thin films ; TiO2-FeZ ; solar irradiation ; diclofenac ; water treatment

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