New Approach Toward Nanosized Ferrous Ferric Oxide and Fe₃O₄-doped Titanium Dioxide Photocatalysts

Abstract

In this article, ferrous ferric oxide and Fe(3)O(4)-doped titanium dioxide have been synthesized by a low-temperature sol-gel process. In particular, we studied the structural characteristics of newly synthesized photosensitive catalysts and their photocatalytic abilities under UV and visible light irradiation. The elemental composition, surface area, crystallinity, and morphology of synthesized catalysts were characterized by Fourier transformation infrared spectrophotometry, X-ray photoelectron spectroscopy, X-ray diffraction, and transmission electron microscopy with selected area electron diffraction and energy-dispersive X-ray spectroscopy. The UV-vis transmission, zeta-potential, and cytotoxicity of the synthesized catalysts are also discussed. It is anticipated that the synthesized ferrous ferric oxide arrays a prospective photocatalyst substitute for titanium dioxide.

Highly active magnetic bismuth tungstate/magnetite composite under visible light irradiation in the presence of hydrogen peroxide

“…[30]. In the composites with Bi 2 WO 6 , the diffraction peaks at 26.5°, 28.2°, 47.2°and 55.8°are attributed to the (1 3 1) (2 0 0) (2 0 2) (1 3 3) [32]. In the spectrum of Bi 2 WO 6 /Fe 3 O 4 composite, the peaks at 730 and 628 cm À1 attribute to Bi-O, W-O stretching and W-O-W bridge stretching modes; the peak at 572 cm À1 belongs to Fe-O-Fe.…”

Photocatalytic Properties of Tin Oxide and Antimony-Doped Tin Oxide Nanoparticles

“…Sb : SnO 2 (Sb = 0%) particles/films have a band gap of 3.6 eV−3.8 eV, which corresponds with light quanta of 320-340 nm [16,17]. Hence, when MPS-Sb : SnO 2 (Sb = 0%)/PEGDA 575 formulations without any other photocatalytic molecule/particle are irradiated with light with wavelengths well above 340 nm a direct excitation of the electron from the valence band into the conduction band can no longer occur [8,17]. Still very similar changes in the IR spectra of the formulations are observed during irradiation with 365, 408, 545, or 650 ± 5 nm to those when these formulations were irradiated with 315 nm (Figure 1(a)).…”

“…Most of these applications require a large conversion efficiency under visible (solar) light illumination, but for many of these materials this efficiency is absent, because they absorb only a small fraction of the UV part of the solar spectrum. To enhance the absorption of radiation at higher wavelengths, the influence of doping of these materials is being studied, and considerable improvements in, for instance, the photocatalytic activity of TiO 2 for visible light have been reported when these materials were doped with metal ions or nitrogen [1,[5][6][7][8][9][10]. Also the incorporation of narrow-band-gab semiconductors or the formation of heterostructures using wide-band-gap semiconductors, such as ZnO 2 -SnO 2 , are promising [11].…”

Photo-catalytic selectivity of anthranilic acid over iron oxide incorporated titania nanoparticles: Influence of the Fe2+/Fe3+ ratio of iron oxide

“…Fe 1−x Ti x O 2 nanoparticles. The preparation of iron oxide incorporated TiO 2 nanoparticles is few [9][10][11]. In this study, a novel nano-composite photocatalyst, iron oxide incorporated titania (FIT) nanoparticles is developed via a non-aqueous route with a tunable atomic ratio of Fe/Ti from 3.53% to 20.79% via a non-aqueous route as a solution for the dilemma.…”