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

Aziz, A.A. and Yong, K.S. and Ibrahim, S. and 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
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 01:55
Last Modified: 03 Jul 2017 08:38
URI: http://eprints.um.edu.my/id/eprint/9423

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