Enhanced magnetic separation and photocatalytic activity of nitrogen doped titania photocatalyst supported on strontium ferrite

Aziz, A.A.; Yong, K.S.; Ibrahim, S.; Pichiah, S. (2012) Enhanced magnetic separation and photocatalytic activity of nitrogen doped titania photocatalyst supported on strontium ferrite. Journal of Hazardous Materials, 199-20. pp. 143-150. ISSN 0304-3894

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    Abstract

    An enhanced ferromagnetic property, visible light active TiO 2 photocatalyst was successfully synthesized by supporting strontium ferrite (SrFe 12O 19) onto TiO 2 doped with nitrogen (N) and compared with N-doped TiO 2. The synthesized catalysts were further characterized with X-ray diffraction (XRD), transmission electron microscope (TEM), energy dispersive X-ray spectroscopy (EDS), BET surface area analysis, vibrating sample magnetometer (VSM), X-ray photon spectroscopy (XPS) and visible light spectroscopy analysis for their respective properties. The XRD and EDS revealed the structural and inorganic composition of N-TiO 2 supported on SrFe 12O 19. The supported N-TiO 2 exhibited a strong ferromagnetic property with tremendous stability against magnetic property losses. It also resulted in reduced band gap (2.8eV) and better visible light absorption between 400 and 800nm compared to N-doped TiO 2. The photocatalytic activity was investigated with a recalcitrant phenolic compound namely 2,4-dichlorophenol (2,4-DCP) as a model pollutant under direct bright and diffuse sunlight exposure. A complete degradation of 2,4-DCP was achieved with an initial concentration of 50mg/L for both photocatalysts in 180min and 270min respectively under bright sunlight. Similarly the diffuse sunlight study resulted in complete degradation for supported N-TiO 2 and >85% degradation N-TiO 2, respectively. Finally the supported photocatalyst was separated under permanent magnetic field with a mass recovery ∼98% for further reuse. © 2011 Elsevier B.V.

    Item Type: Article
    Creators:
    1. Aziz, A.A.
    2. Yong, K.S.
    3. Ibrahim, S.(Department of Civil Engineering, Faculty of Engineering, University of Malaya, 50603 Kuala Lumpur, MALAYSIA)
    4. Pichiah, S.
    Journal or Publication Title: Journal of Hazardous Materials
    Additional Information: Abd Aziz, Azrina Yong, Kok Soon Ibrahim, Shaliza Pichiah, Saravanan eng Research Support, Non-U.S. Gov't Netherlands 2011/11/22 06:00 J Hazard Mater. 2012 Jan 15;199-200:143-50. doi: 10.1016/j.jhazmat.2011.10.069. Epub 2011 Oct 31.
    Uncontrolled Keywords: 2,4-DCP, Degradation, Magnetic property, N-doped TiO 2, Strontium ferrite supported N-doped TiO 2, Visible light, 2 ,4-DCP, 2 ,4-Dichlorophenol, BET surface area, Energy dispersive X ray spectroscopy, Ferromagnetic properties, Initial concentration, Mass recovery, N-doped TiO, Nitrogen doped titania, Permanent magnetic fields, Phenolic compounds, Photocatalytic activities, Strontium ferrite supported N-doped TiO <sub>2</sub>, Strontium ferrites, Sunlight exposure, Supported photocatalyst, TiO, Transmission electron microscope, Vibrating sample magnetometer, Visible light absorption, X ray photons, XRD, Ferrite, Ferromagnetic materials, Ferromagnetism, Light, Magnetic fields, Magnetic properties, Magnetic separation, Phenols, Photocatalysis, Photocatalysts, Separation, Spectrum analysis, Strontium, Transmission electron microscopy, X ray diffraction, X ray diffraction analysis, X ray spectroscopy, Titanium dioxide, 2,4 dichlorophenol, ferromagnetic material, nitrogen, strontium ferrite, unclassified drug, catalysis, catalyst, concentration (composition), environmental degradation, magnetic field, oxide, spectroscopy, stabilization, X-ray diffraction, analysis, article, chemical composition, concentration (parameters), light absorption, roentgen spectroscopy, sunlight, synthesis, visible light spectroscopy, x ray photon spectroscopy, Magnetics Microscopy, Electron, Transmission, Photochemistry, Titanium, X-Ray Absorption Spectroscopy.
    Subjects: T Technology > T Technology (General)
    T Technology > TA Engineering (General). Civil engineering (General)
    Divisions: Faculty of Engineering
    Depositing User: Mr Jenal S
    Date Deposited: 26 Feb 2014 09:55
    Last Modified: 03 Jul 2017 16:38
    URI: http://eprints.um.edu.my/id/eprint/9423

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