Aziz, A.A. and Puma, G.L. and Ibrahim, S. and Saravanan, P. (2013) Preparation, characterisation and solar photoactivity of titania supported strontium ferrite nanocomposite photocatalyst. Journal of Experimental Nanoscience, 8 (3). pp. 295-310. ISSN 1745-8080, DOI https://doi.org/10.1080/17458080.2012.675087.
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Abstract
Enhanced ferromagnetic and visible light active titanium dioxide (TiO2) photocatalyst was synthesised by depositing a hard ferromagnet strontium ferrite (SrFe12O19) onto TiO2 via an effortless hydrothermal and poly-condensation method. The catalysts were characterised by X-ray diffraction (XRD), transmission electron microscope (TEM), energy dispersive X-ray spectroscopy (EDS), BET surface analysis, vibrating sample magnetometer (VSM), X-ray photon spectroscopy (XPS), Fourier transform infrared spectroscopy (FT-IR) and UV-visible light spectroscopy analysis. The prepared nanocomposite photocatalyst exhibited physically a powerful ferromagnetic property with significant stability against the loss of its magnetic property (coercivity ≈2200 G). The catalyst can be fluidised and recovered by an external magnetic field enhancing separation and mixing efficiency. Furthermore, it resulted in a reduced band gap (≈2.3 eV) which resulted in enhanced visible light absorption compared with unsupported TiO2. The photocatalytic activity was investigated by degrading a recalcitrant phenolic compound, viz., 2, 4-dichlorophenol (2,4-DCP) as model pollutant under different illuminance of daylight. Complete degradation of 2,4-DCP (50 mg/L initial concentration in 0.25 L) was achieved in 120 min (supported photocatalyst) and 180 min (unsupported TiO2) under higher illuminance of sunlight. Likewise under diffused sunlight, 100% degradation of 2,4-DCP was achieved in 240 min for the supported TiO2, while ≥90% degradation could be achieved in 300 min for the unsupported TiO2. The supported nanocomposite was recycled under a permanent magnetic field with a mass recovery of 98% and reused. © 2013 Copyright Taylor and Francis Group, LLC.
| Item Type: | Article |
|---|---|
| Funders: | UNSPECIFIED |
| Additional Information: | Sp. Iss. SI 100DK Times Cited:0 Cited References Count:42 |
| Uncontrolled Keywords: | 2,4-DCP degradation, ferromagnetic, TiO2, TiO2 supported SrFe12O19, visible light, 2 ,4 dichlorophenol(2 ,4 dcp), 2 ,4-DCP, D. transmission electron microscopes (TEM), Energy dispersive X ray spectroscopy, External magnetic field, Ferromagnetic properties, Ferromagnets, Fourier transform infra red (FTIR) spectroscopy, Initial concentration, Mass recovery, Mixing efficiency, Permanent magnetic fields, Phenolic compounds, Photoactivity, Photocatalytic activities, Strontium ferrites, Supported photocatalyst, Supported TiO, Synthesised, TiO, Titania, UV-visible, Vibrating sample magnetometer, Visible light absorption, X ray photons, Degradation, Ferrite, Ferromagnetic materials, Ferromagnetism, Fluidization, Fourier transform infrared spectroscopy, Lighting, Magnetic fields, Magnetic properties, Nanocomposites, Phenols, Photocatalysis, Photocatalysts, Strontium, Surface analysis, Transmission electron microscopy, X ray diffraction, X ray spectroscopy, Titanium dioxide, 2,4 dichlorophenol, ferromagnetic material, nanocomposite, article, catalyst, concentration (parameters), hydrolysis, illumination, infrared spectroscopy, light absorption, magnetic field, nanocatalyst, particle size, photoactivation, photolysis, photon correlation spectroscopy, priority journal, productivity, quantum yield, recycling, sunlight, surface property, ultraviolet 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: | 02 Apr 2014 01:49 |
| Last Modified: | 03 Jul 2017 08:30 |
| URI: | http://eprints.um.edu.my/id/eprint/9437 |
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