Photoactive TiO2 Films Formation by Drain Coating for Endosulfan Degradation
Heterogeneous photocatalysis is an advanced oxidation process in which a photoactive catalyst, such as TiO2, is attached to a support to produce free radical species known as reactive oxygen species (ROS) that can be used to break down toxic organic compounds. In this study, the draining time, annea...
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| Format: | Article |
| Language: | English |
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Wiley
2013-01-01
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| Series: | International Journal of Photoenergy |
| Online Access: | http://dx.doi.org/10.1155/2013/560840 |
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| author | Natalia Tapia-Orozco Refugio Rodríguez Vázquez |
| author_facet | Natalia Tapia-Orozco Refugio Rodríguez Vázquez |
| author_sort | Natalia Tapia-Orozco |
| collection | DOAJ |
| description | Heterogeneous photocatalysis is an advanced oxidation process in which a photoactive catalyst, such as TiO2, is attached to a support to produce free radical species known as reactive oxygen species (ROS) that can be used to break down toxic organic compounds. In this study, the draining time, annealing temperature, and draining/annealing cycles for TiO2 films grown by the drain coating method were evaluated using a 23 factorial experimental design to determine the photoactivity of the films via endosulfan degradation. The TiO2 films prepared with a large number of draining/annealing cycles at high temperatures enhanced (P>0.05) endosulfan degradation and superoxide radical generation after 30 minutes of illumination with UV light. We demonstrated a negative correlation (R2=0.69; P>0.01) between endosulfan degradation and superoxide radical generation. The endosulfan degradation rates were the highest at 30 minutes with the F6 film. In addition, films prepared using conditions F1, F4, and F8 underwent an adsorption/desorption process. The kinetic reaction constants, Kapp (min−1), were 0.0101, 0.0080, 0.0055, 0.0048, and 0.0035 for F6, F2, F5, F3, and F1, respectively. The endosulfan metabolites alcohol, ether, and lactone were detected and quantified at varying levels in all photocatalytic assays. |
| format | Article |
| id | doaj-art-5ed791cc032b4efaa1af1f4753293733 |
| institution | OA Journals |
| issn | 1110-662X 1687-529X |
| language | English |
| publishDate | 2013-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | International Journal of Photoenergy |
| spelling | doaj-art-5ed791cc032b4efaa1af1f47532937332025-08-20T02:05:09ZengWileyInternational Journal of Photoenergy1110-662X1687-529X2013-01-01201310.1155/2013/560840560840Photoactive TiO2 Films Formation by Drain Coating for Endosulfan DegradationNatalia Tapia-Orozco0Refugio Rodríguez Vázquez1Programa de Nanociencias y Nanotecnología, Centro de Investigación y de Estudios Avanzados del Instituto Politécnico Nacional, Ave Instituto Politécnico Nacional 2508, San Pedro Zacatenco, 07360 Mexico City, DF, MexicoPrograma de Nanociencias y Nanotecnología, Centro de Investigación y de Estudios Avanzados del Instituto Politécnico Nacional, Ave Instituto Politécnico Nacional 2508, San Pedro Zacatenco, 07360 Mexico City, DF, MexicoHeterogeneous photocatalysis is an advanced oxidation process in which a photoactive catalyst, such as TiO2, is attached to a support to produce free radical species known as reactive oxygen species (ROS) that can be used to break down toxic organic compounds. In this study, the draining time, annealing temperature, and draining/annealing cycles for TiO2 films grown by the drain coating method were evaluated using a 23 factorial experimental design to determine the photoactivity of the films via endosulfan degradation. The TiO2 films prepared with a large number of draining/annealing cycles at high temperatures enhanced (P>0.05) endosulfan degradation and superoxide radical generation after 30 minutes of illumination with UV light. We demonstrated a negative correlation (R2=0.69; P>0.01) between endosulfan degradation and superoxide radical generation. The endosulfan degradation rates were the highest at 30 minutes with the F6 film. In addition, films prepared using conditions F1, F4, and F8 underwent an adsorption/desorption process. The kinetic reaction constants, Kapp (min−1), were 0.0101, 0.0080, 0.0055, 0.0048, and 0.0035 for F6, F2, F5, F3, and F1, respectively. The endosulfan metabolites alcohol, ether, and lactone were detected and quantified at varying levels in all photocatalytic assays.http://dx.doi.org/10.1155/2013/560840 |
| spellingShingle | Natalia Tapia-Orozco Refugio Rodríguez Vázquez Photoactive TiO2 Films Formation by Drain Coating for Endosulfan Degradation International Journal of Photoenergy |
| title | Photoactive TiO2 Films Formation by Drain Coating for Endosulfan Degradation |
| title_full | Photoactive TiO2 Films Formation by Drain Coating for Endosulfan Degradation |
| title_fullStr | Photoactive TiO2 Films Formation by Drain Coating for Endosulfan Degradation |
| title_full_unstemmed | Photoactive TiO2 Films Formation by Drain Coating for Endosulfan Degradation |
| title_short | Photoactive TiO2 Films Formation by Drain Coating for Endosulfan Degradation |
| title_sort | photoactive tio2 films formation by drain coating for endosulfan degradation |
| url | http://dx.doi.org/10.1155/2013/560840 |
| work_keys_str_mv | AT nataliatapiaorozco photoactivetio2filmsformationbydraincoatingforendosulfandegradation AT refugiorodriguezvazquez photoactivetio2filmsformationbydraincoatingforendosulfandegradation |