Croatica Chemica Acta, Vol. 91 No. 4, 2018.
Original scientific paper
https://doi.org/10.5562/cca3441
Structural Properties of Iron/Titanium Oxide Nanoparticles Synthesized by Sol-gel Method in the Presence of Poly(ethylene glycol)
Ivan Marić
; Ruđer Bošković Institute, Radiation Chemistry and Dosimetry Laboratory, Bijenička c. 54, Zagreb, Croatia
Marijan Gotić
; Center of Excellence for Advanced Materials and Sensing Devices, Research Unit New Functional Materials, Ruđer Bošković Institute, Bijenička c. 54, Zagreb, Croatia
Tanja Jurkin
orcid.org/0000-0002-8973-5091
; Ruđer Bošković Institute, Radiation Chemistry and Dosimetry Laboratory, Bijenička c. 54, Zagreb, Croatia
Lara Mikac
orcid.org/0000-0002-9628-4647
; Center of Excellence for Advanced Materials and Sensing Devices, Research Unit New Functional Materials, Ruđer Bošković Institute, Bijenička c. 54, Zagreb, Croatia
Élisabeth Tronc
; Laboratoire de Chimie de la Matière Condensée, Université Pierre et the Marie Curie-Paris6, UMR CNRS 7574 Jussieu, France
Mile Ivanda
; Center of Excellence for Advanced Materials and Sensing Devices, Research Unit New Functional Materials, Ruđer Bošković Institute, Bijenička c. 54, Zagreb, Croatia
Abstract
Iron/Titanium oxide nanoparticles with initial molar ratio Fe/(Fe+Ti) = 0.05 (low loading of Fe in TiO2) and Fe/(Fe+Ti) = 0.15 (high loading of Fe in TiO2) were synthesized by a modified sol-gel procedure using Ti(IV)-isopropoxide, FeSO4 ∙ 7H2O and poly(ethylene glycol) (PEG) as starting material. The amount of doped iron strongly affected structural properties as well as the degree of dispersion of iron in the Fe-Ti-O system. The highly-doped sample contained poorly crystallized hydrated iron(III)-sulphates or basic iron(III)-sulphates in a considerable amount. The lowly-doped Fe-TiO2 sample contained about 22 wt % of brookite that had taken up iron virtually in the same proportion as anatase. Contrary to quasi-homogeneous distributions of iron in the lowly-doped Fe-TiO2 sample, the uptake of iron in the highly-doped Fe-TiO2 sample heated at 500 °C is significant, but anatase is free from iron, thus suggesting a heterogeneous distribution of iron. The photocatalytic activity of the highly-doped Fe-TiO2 sample was better than that of the lowly-doped Fe-TiO2 sample, but still below the photoactivity of Degussa P25 reference photocatalyst.
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Keywords
TiO2; iron-doped; iron/titanium oxide; sol-gel; PEG
Hrčak ID:
216129
URI
Publication date:
30.12.2018.
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