Photocatalytic degradation of the 2,4-dichlorophenoxyacetic acid herbicide using supported iridium materials
In this work, the effect of the addition of iridium on TiO2 and Nb2O5 supports obtained by wet impregnation method was evaluated in the photocatalytic degradation of 2,4-dichlorophenoxiacetic acid under UV irradiation. The synthetized materials were analyzed by different techniques in order to deter...
| Main Authors: | , , , , |
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| Format: | Online |
| Language: | spa |
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Universidad Pedagógica y Tecnológica de Colombia
2021
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| Subjects: | |
| Online Access: | https://revistas.uptc.edu.co/index.php/ciencia_en_desarrollo/article/view/12447 |
| _version_ | 1801706348557107200 |
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| author | Castañeda Martínez, Claudia Patricia Alvarado Ortega, Ignacio Alfonso Rojas Sarmiento, Hugo Alfonso Tzompantzi Morales, Francisco Javier Gómez Romero, José Ricardo |
| author_facet | Castañeda Martínez, Claudia Patricia Alvarado Ortega, Ignacio Alfonso Rojas Sarmiento, Hugo Alfonso Tzompantzi Morales, Francisco Javier Gómez Romero, José Ricardo |
| author_sort | Castañeda Martínez, Claudia Patricia |
| collection | OJS |
| description | In this work, the effect of the addition of iridium on TiO2 and Nb2O5 supports obtained by wet impregnation method was evaluated in the photocatalytic degradation of 2,4-dichlorophenoxiacetic acid under UV irradiation. The synthetized materials were analyzed by different techniques in order to determinate their physicochemical properties. In general, it was observed that the addition of iridium modifies the surface area, band gap energy and it enhances the crystallinity of the materials. Besides, an increase in the photoactivity in the degradation of the herbicide was evidenced using the materials modified. However, the Ir/TiO2 photocatalyst possess the best photocatalytic behavior toward the degradation and possible mineralization of the herbicide. The improved performance of the photocatalyst could be argued by the role of the iridium particles as electron collectors favoring the effective separation of the charge carriers and, as consequence, increasing the degradation of the molecule. |
| format | Online |
| id | oai:oai.revistas.uptc.edu.co:article-12447 |
| institution | Revista Ciencia en Desarrollo |
| language | spa |
| publishDate | 2021 |
| publisher | Universidad Pedagógica y Tecnológica de Colombia |
| record_format | ojs |
| spelling | oai:oai.revistas.uptc.edu.co:article-124472021-12-14T02:35:17Z Photocatalytic degradation of the 2,4-dichlorophenoxyacetic acid herbicide using supported iridium materials Degradación fotocatalítica del herbicida ácido 2,4-diclorofenoxiacético empleando materiales de iridio soportado Castañeda Martínez, Claudia Patricia Alvarado Ortega, Ignacio Alfonso Rojas Sarmiento, Hugo Alfonso Tzompantzi Morales, Francisco Javier Gómez Romero, José Ricardo 2,4-diclorophenoxyacetic acid, Iridium, Nb2O5, Photocatalysis, photodegradation, TiO2. ácido 2,4-diclorofenoxiacético, Fotodegradación, Fotocatálisis, Iridio, Nb2O5, TiO2. In this work, the effect of the addition of iridium on TiO2 and Nb2O5 supports obtained by wet impregnation method was evaluated in the photocatalytic degradation of 2,4-dichlorophenoxiacetic acid under UV irradiation. The synthetized materials were analyzed by different techniques in order to determinate their physicochemical properties. In general, it was observed that the addition of iridium modifies the surface area, band gap energy and it enhances the crystallinity of the materials. Besides, an increase in the photoactivity in the degradation of the herbicide was evidenced using the materials modified. However, the Ir/TiO2 photocatalyst possess the best photocatalytic behavior toward the degradation and possible mineralization of the herbicide. The improved performance of the photocatalyst could be argued by the role of the iridium particles as electron collectors favoring the effective separation of the charge carriers and, as consequence, increasing the degradation of the molecule. En este trabajo se evaluó el efecto de la adición de iridio sobre soportes de TiO2 y Nb2O5 obtenidos por el método de impregnación húmeda en la degradación fotocatalítica del ácido 2,4-diclorofenoxiacético bajo irradiación UV. Los materiales sintetizados fueron analizados mediante diferentes técnicas para determinar sus propiedades fisicoquímicas. En general, se observó que la adición de iridio modifica el área superficial, la energía de banda prohibida y mejora la cristalinidad de los materiales. Además, se evidenció un aumento de la fotoactividad en la degradación del herbicida utilizando los materiales modificados. Sin embargo, el fotocatalizador Ir/TiO2 presentó el mejor comportamiento fotocatalítico hacia la degradación y posible mineralización del herbicida. El rendimiento mejorado del fotocatalizador podría argumentarse por el papel de las partículas de iridio como colectores de electrones que favorecen la separación efectiva de los portadores de carga y, como consecuencia, aumenta la degradación de la molécula. Universidad Pedagógica y Tecnológica de Colombia 2021-01-08 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Texto Texto application/pdf https://revistas.uptc.edu.co/index.php/ciencia_en_desarrollo/article/view/12447 10.19053/01217488.v12.n1.2021.12447 Ciencia En Desarrollo; Vol. 12 No. 1 (2021): Vol 12, Núm.1 (2021): Enero-Junio; 125-134 Ciencia en Desarrollo; Vol. 12 Núm. 1 (2021): Vol 12, Núm.1 (2021): Enero-Junio; 125-134 2462-7658 0121-7488 spa https://revistas.uptc.edu.co/index.php/ciencia_en_desarrollo/article/view/12447/10696 Derechos de autor 2021 CIENCIA EN DESARROLLO |
| spellingShingle | 2,4-diclorophenoxyacetic acid, Iridium, Nb2O5, Photocatalysis, photodegradation, TiO2. ácido 2,4-diclorofenoxiacético, Fotodegradación, Fotocatálisis, Iridio, Nb2O5, TiO2. Castañeda Martínez, Claudia Patricia Alvarado Ortega, Ignacio Alfonso Rojas Sarmiento, Hugo Alfonso Tzompantzi Morales, Francisco Javier Gómez Romero, José Ricardo Photocatalytic degradation of the 2,4-dichlorophenoxyacetic acid herbicide using supported iridium materials |
| title | Photocatalytic degradation of the 2,4-dichlorophenoxyacetic acid herbicide using supported iridium materials |
| title_alt | Degradación fotocatalítica del herbicida ácido 2,4-diclorofenoxiacético empleando materiales de iridio soportado |
| title_full | Photocatalytic degradation of the 2,4-dichlorophenoxyacetic acid herbicide using supported iridium materials |
| title_fullStr | Photocatalytic degradation of the 2,4-dichlorophenoxyacetic acid herbicide using supported iridium materials |
| title_full_unstemmed | Photocatalytic degradation of the 2,4-dichlorophenoxyacetic acid herbicide using supported iridium materials |
| title_short | Photocatalytic degradation of the 2,4-dichlorophenoxyacetic acid herbicide using supported iridium materials |
| title_sort | photocatalytic degradation of the 2 4 dichlorophenoxyacetic acid herbicide using supported iridium materials |
| topic | 2,4-diclorophenoxyacetic acid, Iridium, Nb2O5, Photocatalysis, photodegradation, TiO2. ácido 2,4-diclorofenoxiacético, Fotodegradación, Fotocatálisis, Iridio, Nb2O5, TiO2. |
| topic_facet | 2,4-diclorophenoxyacetic acid, Iridium, Nb2O5, Photocatalysis, photodegradation, TiO2. ácido 2,4-diclorofenoxiacético, Fotodegradación, Fotocatálisis, Iridio, Nb2O5, TiO2. |
| url | https://revistas.uptc.edu.co/index.php/ciencia_en_desarrollo/article/view/12447 |
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