Naslov
Hydrothermal synthesis of FeOOH and Fe2O3 modified self-organizing immobilized TiO2 nanotubes for photocatalytic degradation of 1H-benzotriazole

Autori
Čižmar, Tihana ; Kojić, Vedran ; Rukavina, Marko ; Brkljačić, Lidija ; Salamon, Krešimir ; Grčić, Ivana ; Radetić, Lucija ; Gajović, Andreja

Izvornik
Catalysts (2073-4344) 10 (2020), 12; 1371, 19

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
iO2 nanotubes ; FeOOH and Fe2O3 modified immobilized TiO2 photocatalysts ; hydrothermal synthesis ; photocatalytic activity ; 1H-benzotriazole

Sažetak
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.

Izvorni jezik
Engleski

Znanstvena područja
Interdisciplinarne tehničke znanosti

POVEZANOST RADA