Effect of the Mg/Al Ratio on Activated Sol-Gel Hydrotalcites for Photocatalytic Degradation of 2,4,6-Trichlorophenol
Currently, interest has grown in finding effective solutions for the treatment of water pollution by toxic compounds. Some of the latter that have acquired importance are phenols and chlorophenols, due to their employment in the manufacture of pesticides, insecticides, cords of wood, paper industry,...
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| Format: | Article |
| Language: | English |
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Wiley
2017-01-01
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| Series: | International Journal of Photoenergy |
| Online Access: | http://dx.doi.org/10.1155/2017/5373482 |
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| author | Esthela Ramos-Ramírez Norma L. Gutiérrez-Ortega Francisco Tzompantzi-Morales Gloria A. Del Ángel Claudia Martínez-Gómez Elizabeth Pabón-Gelves |
| author_facet | Esthela Ramos-Ramírez Norma L. Gutiérrez-Ortega Francisco Tzompantzi-Morales Gloria A. Del Ángel Claudia Martínez-Gómez Elizabeth Pabón-Gelves |
| author_sort | Esthela Ramos-Ramírez |
| collection | DOAJ |
| description | Currently, interest has grown in finding effective solutions for the treatment of water pollution by toxic compounds. Some of the latter that have acquired importance are phenols and chlorophenols, due to their employment in the manufacture of pesticides, insecticides, cords of wood, paper industry, among others. The problem is rooted in that these compounds are very persistent in the environment because they are partially biodegradable and cannot be photodegraded directly by sunlight. Chlorophenols are extremely toxic, especially 2,4,6-trichlorophenol, which is potentially carcinogenic. In this work, Mg/Al-mixed oxide catalysts were obtained from the thermal treatment of hydrotalcite-type materials, synthesized by sol-gel method with different Mg/Al ratios. Hydrotalcites and Mg/Al-mixed oxides were physicochemically characterized by X-ray diffraction, thermal analysis (DTA and TGA), and N2 physisorption. The results were obtained on having proven the photocatalytic degradation of 2,4,6-trichlorophenol as a pollutant model by water. The catalysts obtained present the hydrotalcite phase with thermal evolution until achieving Mg/Al-mixed oxides at 500°C. The catalysts are of mesoporous materials and exhibiting large surface areas. The catalysts demonstrated good photocatalytic activity with good efficiency, reaching degradation percentages with Mg/Al = 1, 2, 4, 5, and 7 ratios of 94.2, 92.5, 86.2, 84.2, and 63.9%, respectively, until achieving mineralization. |
| format | Article |
| id | doaj-art-5c9deaaf71de499c908b43ba687b0bc2 |
| institution | Kabale University |
| issn | 1110-662X 1687-529X |
| language | English |
| publishDate | 2017-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | International Journal of Photoenergy |
| spelling | doaj-art-5c9deaaf71de499c908b43ba687b0bc22025-02-03T01:02:19ZengWileyInternational Journal of Photoenergy1110-662X1687-529X2017-01-01201710.1155/2017/53734825373482Effect of the Mg/Al Ratio on Activated Sol-Gel Hydrotalcites for Photocatalytic Degradation of 2,4,6-TrichlorophenolEsthela Ramos-Ramírez0Norma L. Gutiérrez-Ortega1Francisco Tzompantzi-Morales2Gloria A. Del Ángel3Claudia Martínez-Gómez4Elizabeth Pabón-Gelves5Departamento de Química, División de Ciencias Naturales y Exactas de la Universidad de Guanajuato, Noria Alta s/n, Col. Noria Alta, 36050 Guanajuato, GTO, MexicoDepartamento de Ingeniería Civil, División de Ingenierías de la Universidad de Guanajuato, Juárez No. 77, Col. Centro., 36000 Guanajuato, GTO, MexicoDepartamento Química, Ecocatal, Universidad Autónoma Metropolitana-Iztapalapa, Av. San Rafael Atlixco No. 186, 09340 Ciudad de México, MexicoDepartamento Química, Ecocatal, Universidad Autónoma Metropolitana-Iztapalapa, Av. San Rafael Atlixco No. 186, 09340 Ciudad de México, MexicoDepartamento de Química, División de Ciencias Naturales y Exactas de la Universidad de Guanajuato, Noria Alta s/n, Col. Noria Alta, 36050 Guanajuato, GTO, MexicoGrupo Ciencia de Materiales Avanzados, Facultad de Ciencias, Universidad Nacional de Colombia-Sede Medellín, 59A No. 63-20, Medellín, ColombiaCurrently, interest has grown in finding effective solutions for the treatment of water pollution by toxic compounds. Some of the latter that have acquired importance are phenols and chlorophenols, due to their employment in the manufacture of pesticides, insecticides, cords of wood, paper industry, among others. The problem is rooted in that these compounds are very persistent in the environment because they are partially biodegradable and cannot be photodegraded directly by sunlight. Chlorophenols are extremely toxic, especially 2,4,6-trichlorophenol, which is potentially carcinogenic. In this work, Mg/Al-mixed oxide catalysts were obtained from the thermal treatment of hydrotalcite-type materials, synthesized by sol-gel method with different Mg/Al ratios. Hydrotalcites and Mg/Al-mixed oxides were physicochemically characterized by X-ray diffraction, thermal analysis (DTA and TGA), and N2 physisorption. The results were obtained on having proven the photocatalytic degradation of 2,4,6-trichlorophenol as a pollutant model by water. The catalysts obtained present the hydrotalcite phase with thermal evolution until achieving Mg/Al-mixed oxides at 500°C. The catalysts are of mesoporous materials and exhibiting large surface areas. The catalysts demonstrated good photocatalytic activity with good efficiency, reaching degradation percentages with Mg/Al = 1, 2, 4, 5, and 7 ratios of 94.2, 92.5, 86.2, 84.2, and 63.9%, respectively, until achieving mineralization.http://dx.doi.org/10.1155/2017/5373482 |
| spellingShingle | Esthela Ramos-Ramírez Norma L. Gutiérrez-Ortega Francisco Tzompantzi-Morales Gloria A. Del Ángel Claudia Martínez-Gómez Elizabeth Pabón-Gelves Effect of the Mg/Al Ratio on Activated Sol-Gel Hydrotalcites for Photocatalytic Degradation of 2,4,6-Trichlorophenol International Journal of Photoenergy |
| title | Effect of the Mg/Al Ratio on Activated Sol-Gel Hydrotalcites for Photocatalytic Degradation of 2,4,6-Trichlorophenol |
| title_full | Effect of the Mg/Al Ratio on Activated Sol-Gel Hydrotalcites for Photocatalytic Degradation of 2,4,6-Trichlorophenol |
| title_fullStr | Effect of the Mg/Al Ratio on Activated Sol-Gel Hydrotalcites for Photocatalytic Degradation of 2,4,6-Trichlorophenol |
| title_full_unstemmed | Effect of the Mg/Al Ratio on Activated Sol-Gel Hydrotalcites for Photocatalytic Degradation of 2,4,6-Trichlorophenol |
| title_short | Effect of the Mg/Al Ratio on Activated Sol-Gel Hydrotalcites for Photocatalytic Degradation of 2,4,6-Trichlorophenol |
| title_sort | effect of the mg al ratio on activated sol gel hydrotalcites for photocatalytic degradation of 2 4 6 trichlorophenol |
| url | http://dx.doi.org/10.1155/2017/5373482 |
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