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Hydrothermal Synthesis of FeOOH and Fe2O3 Modified Self-Organizing Immobilized TiO2 Nanotubes for Photocatalytic Degradation of 1H-Benzotriazole

Čižmar, Tihana; Kojić, Vedran; Rukavina, Marko; Brkljačić, Lidija; Salamon, Krešimir; Grčić, Ivana; Radetić, Lucija; Gajović, Andreja (2020) Hydrothermal Synthesis of FeOOH and Fe2O3 Modified Self-Organizing Immobilized TiO2 Nanotubes for Photocatalytic Degradation of 1H-Benzotriazole. Catalysts, 10 (12). ISSN 2073-4344

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Abstract

In this study, titanium dioxide nanotubes were prepared by electrochemical anodization technique and modified with an aqueous solution of FeCl3 using hydrothermal synthesis method to control the amount and distribution of iron compounds on the anatase TiO2 nanotubes. The objective was to synthesize immobilized FeOOH@TiO2 or Fe2O3@TiO2 photocatalysts designed for the flow-through reactor systems ; to investigate thermal treatment effect on the photocatalytic efficiency ; to determine appropriate Fe-compounds concentration for the maximum photocatalytic activity improvement, and to explain the mechanism responsible for the enhancement. The photocatalysts were tested for the degradation of 1H-benzotriazole in water under UV/solar light irradiation. Up to two times increase in the photocatalytic activity was obtained when TiO2 nanotubes were modified with 0.8 mM Fe. At higher Fe concentrations (8 mM and 80 mM), the photocatalytic activity of the given photocatalysts decreased. To confirm the formation of FeOOH or Fe2O3 species, and to clarify the mechanism of photoactivity, X-ray diffraction (XRD), Raman spectroscopy (RS), Scanning Electron Microscopy (SEM) and Energy Dispersive X-ray spectroscopy (EDS) and UV-Vis spectroscopy were used.

Item Type: Article
Uncontrolled Keywords: iO2 nanotubes ; FeOOH and Fe2O3 modified immobilized TiO2 photocatalysts ; hydrothermal synthesis ; photocatalytic activity ; 1H-benzotriazole
Subjects: TECHNICAL SCIENCES > Interdisciplinary Technical Sciences
Divisions: Division of Materials Physics
Depositing User: Andreja Gajović
Date Deposited: 26 Nov 2020 12:58
Last Modified: 26 Nov 2020 12:58
URI: http://fulir.irb.hr/id/eprint/6020
DOI: 10.3390/catal10121371

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