Artículo
Boosting the visible-light photoactivity of Bi2WO6 using acidic carbon additives
Autor/es | Jiménez Carmona, Rocío
Fernández Velasco, Leticia Hidalgo López, María del Carmen Navío Santos, José Antonio Ovin Ania, María Concepción |
Departamento | Universidad de Sevilla. Departamento de Química Inorgánica |
Fecha de publicación | 2015 |
Fecha de depósito | 2022-11-02 |
Publicado en |
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Resumen | We have explored the role of the physicohemical properties of carbon materials as additives to
bismuth tungstate on its structure, optical properties, and photocatalytic activity for the
degradation of rhodamine B under ... We have explored the role of the physicohemical properties of carbon materials as additives to bismuth tungstate on its structure, optical properties, and photocatalytic activity for the degradation of rhodamine B under visible light. For this purpose, C/Bi2WO6 hybrid composites were prepared following two different routes: i) physical mixture of the catalyst components, and ii) one-pot hydrothermal synthesis of the semiconductor in the presence of the carbon additive. Three carbons with different properties were selected as additives: biomass-derived activated carbon, carbon nanotubes and carbon spheres obtained from polysaccharides. Data has shown the outstanding role of the acidic/basic nature of the carbon additive, and of the synthetic method on the photocatalytic performance of the resulting composites. For a given additive, the degradation rate of RhB is greatly improved for the catalysts prepared through a one-step hydrothermal synthesis, where there is low shielding effect of the carbon matrix. Carbon additives of acidic nature boost the surface acidity of the hybrid photocatalyst, thereby enhancing the photodegradation of RhB under visible light via a coupled mechanism (photosensitization, semiconductor photocatalysis and carbon-photon mediated reactions). |
Agencias financiadoras | Ministerio de Economía y Competitividad (MINECO). España PCTI Asturias |
Identificador del proyecto | grants CTM2014/56770-R
grants CTQ2011/26617 grant PC10-002 |
Cita | Jiménez Carmona, R., Fernández Velasco, L., Hidalgo López, M.d.C., Navío Santos, J.A. y Ovin Ania, M.C. (2015). Boosting the visible-light photoactivity of Bi2WO6 using acidic carbon additives. Applied Catalysis A: General, 505, 467-477. https://doi.org/https://doi.org/10.1016/j.apcata.2015.05.011. |
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