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

IF 1.3 Q3 ENGINEERING, CHEMICAL Bulletin of Chemical Reaction Engineering and Catalysis Pub Date : 2021-06-30 DOI:10.9767/BCREC.16.2.10325.293-301

A. B. Aritonang, E. Pratiwi, W. Warsidah, S. Nurdiansyah, Risko Risko

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引用次数: 6

Abstract

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 cm−1 and 774 cm−1 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 (https://creativecommons.org/licenses/by-sa/4.0).

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fe掺杂TiO2/高岭石作为可见光下的抗菌光催化剂

在本工作中，通过溶胶-凝胶法成功地合成了固定在高岭石表面的未掺杂和Fe掺杂的TiO2，其具有不同的Fe浓度（0.05、0.125和0.25wt%）。通过漫反射紫外-可见光谱（DRS）、傅立叶变换红外光谱（FTIR）和X射线衍射（XRD）深入研究了Fe掺杂对TiO2晶格的影响。未掺杂和Fe掺杂的TiO2/高岭石的光学带隙相对于Fe3+掺入TiO2的带隙结构发生红移。FTIR光谱显示在586 cm−1和774 cm−2处的波数处的峰偏移，这是作为Fe-TiO2键形成的指示的Fe−O振动的属性。将Fe3+阳离子掺入TiO2晶格中代替Ti4+离子，这引起了锐钛矿晶体结构的扰动，导致晶格的距离间距dhkl（101）从8.9632变化到7.9413。在可见光照射下，与TiO2/高岭石相比，Fe掺杂的TiO2/高岭土在溶液介质中对大肠杆菌生长的抑制作用增强。版权所有©2021作者所有，BCREC集团出版。这是CC BY-SA许可证下的开放访问文章(https://creativecommons.org/licenses/by-sa/4.0)。

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来源期刊

Bulletin of Chemical Reaction Engineering and Catalysis ENGINEERING, CHEMICAL-

CiteScore

3.20

自引率

6.70%

发文量

审稿时长

12 weeks

期刊介绍： Bulletin of Chemical Reaction Engineering & Catalysis, a reputable international journal, provides a forum for publishing the novel technologies related to the catalyst, catalysis, chemical reactor, kinetics, and chemical reaction engineering. Scientific articles dealing with the following topics in chemical reaction engineering, catalysis science and engineering, catalyst preparation method and characterization, novel innovation of chemical reactor, kinetic studies, etc. are particularly welcome. However, articles concerned on general chemical engineering process are not covered and out of scope of this journal