Journal
CHEMOSPHERE
Volume 146, Issue -, Pages 51-59Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.chemosphere.2015.12.008
Keywords
Layered double hydroxides; Ti-doping; Photocatalyst; Degradation; 2,4,5-T
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Funding
- Regional University Research Program though the National Research Foundation of Korea (NRF) [NRF 2014-008793]
- Priority Research Centers Program though the National Research Foundation of Korea (NRF) [NRF 2010-0029634]
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The calcined layered double hydroxides (cLDHs) Ti-doped and undoped MgFe for this study were prepared by co-precipitation method followed by calcination at 500 degrees C. The as-prepared samples were characterized by scanning electron microscopy (SEM), X-ray diffraction (XRD), Brunauer Emmett Teller (BET) and UV-Vis diffuse reflectance spectrum (DRS) techniques and tested for adsorption and photo degradation (including photocatalytic and photo-Fenton-like) of 2,4,5-trichlorophenoxyacetic acid (2,4,5-T) in aqueous solutions under visible light irradiation. In the range of studied operating conditions, the as-prepared samples exhibited excellent photo-Fenton-like activity, leading to more than 80-95% degradation of 2,4,5-T at initial concentration of 100 mg L-1 with 4 g calcined LDHs per liter, was accomplished in 360 min, while 2,4,5-T half-life time was as short as 99-182 min. The kinetics of adsorption and photodegradation of 2,4,5-T were also discussed. These results offered a green, low cost and high efficiency photocatalyst for environmental remediation. (C) 2015 Elsevier Ltd. All rights reserved.
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