High Photocatalytic Performance in the Photodegradation of MB Dye of Photocatalytic Efficiency of ZnO/Fe3O4 and TiO2/Fe3O4 Under Visible Light Irradiation

Kadhim, M.J; Allawi, Fatima; Mahdi, M. A.; Najah Abaas, Sami

doi:10.22068/ijmse.2461

Volume 19, Issue 3 (September 2022) IJMSE 2022, 19(3): 16-23 | Back to browse issues page

‎ 10.22068/ijmse.2461

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Kadhim M, Allawi F, Mahdi M A, Najah Abaas S. High Photocatalytic Performance in the Photodegradation of MB Dye of Photocatalytic Efficiency of ZnO/Fe3O4 and TiO2/Fe3O4 Under Visible Light Irradiation. IJMSE 2022; 19 (3) :16-23
URL: http://ijmse.iust.ac.ir/article-1-2461-en.html

High Photocatalytic Performance in the Photodegradation of MB Dye of Photocatalytic Efficiency of ZnO/Fe3O4 and TiO2/Fe3O4 Under Visible Light Irradiation

M.J Kadhim

, Fatima Allawi

, M. A. Mahdi

, Sami Najah Abaas

Abstract: (6332 Views)

Zinc Oxide (ZnO) nanorods and titanium dioxide (TiO₂) nanostructures thin films were prepared onto glass substrates by the chemical bath deposition (CBD) method. The ZnO was structured as nanorods (NRs) while TiO₂ was formed as nanoflowers plate as confirmed by Field-Emission Scanning Electron Microscope (FESEM) images. The ZnO/Fe₃O₄ and TiO₂/Fe₃O₄ nanostructures thin films were prepared via drop-casting Fe₃O₄ NPs onto the grown ZnO and TiO₂ nanostructures thin films. The diameter of Fe₃O₄ NPs was deposited onto ZnO NRs thin films and TiO₂ nanostructures thin films was ranged from 8nm to 59nm with dominated range between 10nm to 30 nm. The crystalline structure of prepared samples was investigated through X-ray diffraction (XRD) method. However, the particles size of Fe₃O₄ was estimated by XRD as well as FESEM images was around 22 nm. The photocatalytic activity of the as-prepared ZnO/Fe₃O₄ and TiO₂/Fe₃O₄ nanostructures thin films was investigated against methylene blue (MB) dye at room temperature with a pH value of 10 under different exposure time by visible light. The photodegradation rate of MB dye by ZnO/Fe₃O₄ and TiO₂/Fe₃O₄ nanostructures thin films was higher than that obtained by ZnO and TiO₂ nanostructures thin films. The best photodegradation rate of MB dye was 100% after exposure time of 180 min was obtained by ZnO/Fe₃O₄ nanostructures thin film whereas it was 82% for TiO₂/Fe₃O₄ nanostructures thin films after exposure time of 240 min.

Keywords: ZnO/Fe3O4, TiO2 /Fe3O4, core/shell, photocatalysis, MB dye.