C-modified TiO2 using lignin as carbon precursor for the solar photocatalytic degradation of acetaminophen
This work deals with the removal of emerging pollutants in water by solar light with photocatalysts based on C-modified TiO2 materials, using lignin as carbonaceous precursor and acetaminophen as target compound. This provides a way of lignin valorization, a large-scale by-product from the pulp and...
| Autores: | , , , , |
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| Tipo de recurso: | artículo |
| Fecha de publicación: | 2019 |
| País: | España |
| Institución: | Universidad Autónoma de Madrid |
| Repositorio: | Biblos-e Archivo. Repositorio Institucional de la UAM |
| Idioma: | inglés |
| OAI Identifier: | oai:repositorio.uam.es:10486/709437 |
| Acceso en línea: | http://hdl.handle.net/10486/709437 https://dx.doi.org/10.1016/j.cej.2018.10.154 |
| Access Level: | acceso abierto |
| Palabra clave: | lignin TiO2 solar photocatalysis water purification emerging pollutants Química |
| Sumario: | This work deals with the removal of emerging pollutants in water by solar light with photocatalysts based on C-modified TiO2 materials, using lignin as carbonaceous precursor and acetaminophen as target compound. This provides a way of lignin valorization, a large-scale by-product from the pulp and paper industry and the future lignocellulosic biorefinery. Several C-modified TiO2 materials were prepared following a hydrothermal method and a further thermal treatment in different atmospheres (air or nitrogen). The resulting catalysts were fully characterized by different techniques to learn on the structure-photoactivity relation. Complete acetaminophen conversion was achieved after only 1 h under solar irradiation with the photocatalysts calcinated under air atmosphere (C-Ti-400air and C-Ti-500air), being radical dotOH and O2radical dot− radicals the main reactive oxygen species involved in the acetaminophen photodegradation. These photocatalysts yielded the highest activity, which was maintained upon four successive uses. These findings are discussed with a focus on the development of active photocatalysts under solar light for the photodegradation of emerging pollutants |
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