Structural and photocatalytical properties of hydrothermally synthesized iron/titanium oxide nanoparticles (CROSBI ID 673378)
Prilog sa skupa u zborniku | sažetak izlaganja sa skupa | međunarodna recenzija
Podaci o odgovornosti
Marić, Ivan ; Štefanić, Goran ; Gotić, Marijan
engleski
Structural and photocatalytical properties of hydrothermally synthesized iron/titanium oxide nanoparticles
Iron/titanium oxide nanoparticles with initial molar ratio [Fe(Fe+Ti)] 0.5 were hydrothermally synthesized at 180 C in aqueous ammonia solution (pH = 9). The titanium and iron precursors were TiCl4 and FeCl3, respectively. The obtained samples were analysed at room temperature using X-ray diffraction (XRD), Raman and Mössbauer spectroscopies, field emission scanning electron microscopy (FESEM) and energy dispersive X-ray spectrometry. The amount of doped iron strongly affected structural properties as well as dispersion of iron in Fe-Ti-O system. Anatase was the dominant phase in the iron/titanium oxide samples with [Fe(Fe+Ti)] 0.25. The iron/titanium oxide sample with [Fe(Fe+Ti)] 0.5 contained no anatase. The average crystallite size of the anatase phase in iron/titanium oxide samples decreased with the increase of iron doping. The appearance of the small diffraction lines of hematite in the product with 10 mol% of the iron indicates that the solid solubility limit of Fe3+ ions in the TiO2 lattice has been reached. However, the results of precise unit-cell parameters measurement, obtained using both Rietveld and Le Bail refinements of the powder diffraction patterns with added silicon as an internal standard, show that the unit cell-volume of anatase increase with the increase of iron content up to 15 mol%. Iron that could not be incorporated in the TiO2 lattice separated in the form of hematite (alfa-Fe2O3) as shown using XRD and Mössbauer spectroscopy. The photocatalytical activities of synthesized samples were investigated using Methylene blue organic dye as a model pollutant.
iron ; titanium oxide ; nanoparticles ; anatase ; hematite ; photocatalytical activity ; X-ray diffraction, Mössbauer spectroscopy ; methylene blue
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Podaci o prilogu
69-69.
2017.
objavljeno
Podaci o matičnoj publikaciji
Twenty-fifth Slovenian-Croatian Crystallographic Meeting : Book of Abstracts and Programme
Ljubljana: University of Ljubljana, Faculty of Chemistry and Chemical technology
Podaci o skupu
Twenty-fifth Slovenian-Croatian Crystallographic Meeting
predavanje
14.06.2017-18.06.2017
Ljubljana, Slovenija