Document Type
Article
Publication Date
1-1-2012
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.
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 2, 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.
Divisions
fac_eng
Publication Title
Journal of Hazardous Materials
Volume
199-20
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.