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Structural Properties of Iron/Titanium Oxide Nanoparticles Synthesized by Sol-gel Method in the Presence of Poly(ethylene glycol)

Marić, Ivan; Gotić, Marijan; Jurkin, Tanja; Mikac, Lara; Tronc, Élisabeth; Ivanda, Mile (2018) Structural Properties of Iron/Titanium Oxide Nanoparticles Synthesized by Sol-gel Method in the Presence of Poly(ethylene glycol). Croatica Chemica Acta, 91 (4). pp. 577-588. ISSN 0011-1643

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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.

Item Type: Article
Uncontrolled Keywords: TiO2 ; iron-doped ; iron/titanium oxide ; sol-gel ; PEG
Subjects: NATURAL SCIENCES > Chemistry
Divisions: Division of Materials Chemistry
Division of Materials Physics
Projects:
Project titleProject leaderProject codeProject type
Hibriridne silicijske nanstrukture za senzorik-NANOSENSMile IvandaIP-2014-09-7046HRZZ
Depositing User: Marijan Gotić
Date Deposited: 03 Jul 2019 11:14
Last Modified: 03 Jul 2019 11:36
URI: http://fulir.irb.hr/id/eprint/4652
DOI: 10.5562/cca3441

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