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Fe-doped TiO2/Kaolinite as an Antibacterial Photocatalyst under Visible Light Irradiation

Anthoni B. Aritonang1 scopus Eka Pratiwi1Warsidah Warsidah2scopus S. I. Nurdiansyah2R. Risko2

1Department of Chemistry, Faculty of Mathematics and Natural Science, Tanjungpura University, Pontianak, 78124, Indonesia

2Department of Marine, Faculty of Mathematics and Natural Science, Tanjungpura University, Pontianak, 78124, Indonesia

Received: 8 Feb 2021; Revised: 1 Apr 2021; Accepted: 2 Apr 2021; Published: 30 Jun 2021; Available online: 7 Apr 2021.
Open Access Copyright (c) 2021 by Authors, Published by BCREC Group
Creative Commons License This work is licensed under a Creative Commons Attribution-ShareAlike 4.0 International License.

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In this work, undoped and Fe-doped TiO2 immobilized on kaolinite surface was successfully synthesized by sol-gel method with various Fe concentrations (0.05, 0.125, and 0.25 wt%). The effects of Fe doping into TiO2 lattice were thoroughly investigated by a diffuse reflectance UV-visible (DRS) spectroscopy, Fourier Transform Infrared (FTIR) spectroscopy, and X-ray diffraction (XRD). The optical band gap of undoped and Fe-doped TiO2/kaolinite is red shifted with respect to the incorporation of Fe3+ into the structure of TiO2 resulted band gap. The FTIR spectra shows a shift of peak at the wave number at 586 cm1 and 774 cm1 which is attribute of the Fe−O vibration as an indication of the formation of Fe-TiO2 bonds. Incorporation of Fe3+ cation into the TiO2 lattice replacing the Ti4+ ions, which induced a perturbation in anatase crystal structure, causes the change in the distance spacing of the crystal lattices dhkl(101) of 8.9632 to 7.9413. The enhanced photocatalytic performance was observed for Fe-doped TiO2/kaolinite compared with TiO2/kaolinite with respect to Escherichia coli growth inhibition in solution media under visible light irradiation. Copyright © 2021 by Authors, Published by BCREC Group. This is an open access article under the CC BY-SA License (



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Keywords: Fe-doped TiO2/kaolinite; photocatalyst; visible light; antibacterial; Escherichia coli
Funding: Tanjungpura University

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