Hydrothermal route to (FE, N) codoped titania photocatalysts with increased visible light activity

Hydrothermal route to (FE, N) codoped titania photocatalysts with increased visible light activity

Publication Type:

Journal Article

Source:

Industria Textila, Volume 68, Issue 4, p.303-308 (2017)

ISBN:

1222-5347

Abstract:

<p>Iron and nitrogen doped TiO2 nanoparticles were synthesized and investigated with the aim to obtain photocatalytic systems with enhanced visible light efficiency. In a first step, commercially available Degussa P25 was impregnated with iron (0.3, 0.5, and 1 at. %) and nitrogen under hydrothermal conditions. In the second step, Fe-N doped TiO2 was synthesized by a hydrothermal route starting with TiCl3, FeCl3 center dot 6H(2)O and Urea, at 200 degrees C for 2 h. All samples were post annealed at 400 degrees C for 2h. The X-ray diffraction (XRD) revealed a two phase nanoscaled composition (Anatase and Rutile) of Degussa P25 and a single phase-nanoscaled Anatase content of the hydrothermally synthesized (1at.%) Fe-N doped TiO2 sample. The presence of Fe and nitrogen in samples was confirmed by Mossbauer and X-ray photoelectron spectroscopy measurements (XPS). Transmission electron microscopy (TEM) revealed the structure, particle dimension and morphology. The photocatalytic measurements (based on degradation of Methylene Blue) evidenced the most efficient composition in TiO2 Degussa P25 series as corresponding to 1 at.% Fe, in both UV and visible spectrum. At the same time, the hydrothermal synthesized sample (1at.%) Fe-N doped TiO2 exhibits the best activity in visible spectral region. The nanoscaled systems were synthesized in view of tests on textile materials.</p>