Microwave-assisted synthesis of Ag-Cu co-modified TiO2 catalyst for efficient photocatalytic oxidation of M-cresol
2022
Zabar, Zakaria | Merabet, Smail | Halim Abdullah, Abdul | Khezami, Lotfi | Bououdina, Mohamed
In this study, the photocatalytic oxidation of toxic industrial compound m-cresol by Ag-Cu/-TiO₂ P25 catalyst under UV light irradiation has been studied. Photocatalysts of P25 titanium dioxide modified with copper and silver are prepared by a new cost-effective microwave-assisted method. By varying the molar ratio Cu:Ag (1:1, 1:2, 2:1), X-ray diffraction analysis manifested a change in anatase/rutile amounts ratio and the appearance new phases Ag₂O and Cu₃Ti besides metallic Ag. The photocatalytic activity has been examined as a function of catalyst dose, the initial concentration of m-cresol, and the addition of airflow. The highest photocatalytic degradation performance is achieved for 2 g/L of 1:1 Ag/Cu-TiO₂ P25 catalyst and 50 mg/L m-cresol in air, much better than TiO₂ P25 catalyst, with good stability and reused after recovery. The improved catalyst gives any industries that use m-cresol as an element in fabricating other products the possibility of controlling the rejected concentrations of MC in wastewater and minimizing its harmful impact on the environment.
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