Journal
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
Volume 227, Issue 1, Pages 45-50Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jphotochem.2011.10.023
Keywords
Photodegradation; 2,4-D herbicide; PdO/Al2O3-Nd2O3 sol-gel; N-2 physisorption; XRD; UV-vis; FTIR
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Funding
- CONACYT [60702]
- COECYTJAL [06-2009-732]
- PROMEP
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The photocatalytic activity of 1.0 wt% PdO supported on Al2O3-Nd2O3 binary oxides prepared by the sol-gel method was studied in the photodegradation of 2,4-dichlorophenoxyacetic acid (2,4-D). The photocatalysts were characterized by N-2 physisorption, XRD and UV-vis spectroscopy. MO supported on gamma-Al2O3 photo-degrades the 2,4-D, however the addition of Nd2O3 to gamma-Al2O3 notably improves the photocatalytic activity. As the concentration of Nd2O3 in the binary oxide increases from 2 to 10 wt%, the photodegradation of 2,4-D is highly enhanced. The catalytic test for PdO supported on pure Nd2O3 showed scarce photocatalytic activity. Total organic carbon (TOC) analysis showed that the 2,4-D has been completely destroyed on the PdO/Al2O3-Nd2O3 photocatalysts after 6 h under irradiation. (C) 2011 Elsevier B.V. All rights reserved.
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