Catalytic ozonation of toxic pollutants over magnetic cobalt-doped Fe3O4 suspensions
TLDR
Magnetic cobalt-doped Fe3O4 (FeCo) was prepared using a co-precipitation method and characterized by X-ray diffraction (XRD), XPS, cyclic voltammetry (CV), and in situ attenuated total reflection Fourier transform infrared (ATR-FTIR) spectroscopy as mentioned in this paper.Abstract:
Magnetic cobalt-doped Fe3O4 (FeCo) was prepared using a co-precipitation method and characterized by X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), cyclic voltammetry (CV), and in situ attenuated total reflection Fourier transform infrared (ATR-FTIR) spectroscopy. The catalyst showed high, stable catalytic activity for the degradation and mineralization of toxic persistent organic pollutants, as demonstrated with the herbicides 2,4-dichlorophenoxyacetic acid, 2,4-dichlorophenol, and 2,4,6-trichlorophenol and pharmaceutical phenazone in aqueous solution with ozone. FeCo was very effective at the mineralization of refractory oxalic acid produced in the degradation of organic compounds. The ozone was adsorbed on the surface of FeCo competing with water molecules in the aqueous phase, and converted into hydroxyl radical, meanwhile the catalyst surface underwent oxidation and reduction as demonstrated by in situ ATR-FTIR, CV and other experimental data obtained. Furthermore, the characterization studies indicated that the introduction of Co increased the rate of FeCo oxidation and reduction during the decomposition of ozone, enhancing the activity and stability of Fe3O4. (c) 2012 Elsevier B.V. All rights reserved.read more
Citations
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Fe-based catalysts for heterogeneous catalytic ozonation of emerging contaminants in water and wastewater
TL;DR: In this paper, the performances of various Fe-based catalysts, including Fe0-derived, FeOOH-based, Fe2O3-derived and Fe3O4-derived composite, were briefly introduced.
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Radical induced degradation of acetaminophen with Fe3O4 magnetic nanoparticles as heterogeneous activator of peroxymonosulfate.
TL;DR: It appeared that Fe(2+)Fe(3+) on the catalyst surface was responsible for the radical generation, and Fe3O4 MNPs activated PMS is a promising technology for water pollution caused by contaminants such as pharmaceuticals.
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Enhanced photocatalytic H 2 -production activity of anatase TiO 2 nanosheet by selectively depositing dual-cocatalysts on {101} and {001} facets
TL;DR: In this article, the authors reported the controlled preparation of anatase TiO2 nanosheet photocatalyst by selectively depositing Co3O4 nanoparticles (NPs) as water oxidation cocatalyst (WOC) and Pt NPs as water reduction cocatalysts (WRC) on {001} and {101} facets, respectively, using a two-step photodeposition method.
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Application of ozonation for pharmaceuticals and personal care products removal from water.
TL;DR: This paper aims to review the studies dealing with ozone based processes for water reuse by considering municipal wastewater reclamation as well as natural and drinking water treatment, and identifies the most interesting cost effective methodology for water treatment.
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Activation of peroxymonosulfate with magnetic Fe3O4–MnO2 core–shell nanocomposites for 4-chlorophenol degradation
TL;DR: In this article, magnetic Fe3O4-MnO2 core-shell nanocomposites with various Fe/Mn weight ratios were synthesized through a facile one pot method and then characterized.
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