Sunlight photoactivity of rice husks-derived biogenic silica

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MetadadosDescriçãoIdioma
Autor(es): dc.contributorUniversidade Estadual Paulista (UNESP)-
Autor(es): dc.creatorde Cordoba, María C. Fernández-
Autor(es): dc.creatorMatos, Juan-
Autor(es): dc.creatorMontaña, Ricmary-
Autor(es): dc.creatorPoon, Po S.-
Autor(es): dc.creatorLanfredi, Silvania-
Autor(es): dc.creatorPraxedes, Fabiano R.-
Autor(es): dc.creatorHernández-Garrido, Juan C.-
Autor(es): dc.creatorCalvino, José J.-
Autor(es): dc.creatorRodríguez-Aguado, Elena-
Autor(es): dc.creatorRodríguez-Castellón, Enrique-
Autor(es): dc.creatorAnia, Conchi O.-
Data de aceite: dc.date.accessioned2021-03-11T01:31:43Z-
Data de disponibilização: dc.date.available2021-03-11T01:31:43Z-
Data de envio: dc.date.issued2019-10-06-
Data de envio: dc.date.issued2019-10-06-
Data de envio: dc.date.issued2019-05-15-
Fonte completa do material: dc.identifierhttp://dx.doi.org/10.1016/j.cattod.2018.12.008-
Fonte completa do material: dc.identifierhttp://hdl.handle.net/11449/187155-
Fonte: dc.identifier.urihttp://educapes.capes.gov.br/handle/11449/187155-
Descrição: dc.descriptionFederación Española de Enfermedades Raras-
Descrição: dc.descriptionFondo Nacional de Desarrollo Científico y Tecnológico-
Descrição: dc.descriptionCarbon-containing SiO 2 -based photocatalysts were prepared by the solvothermal treatment of rice husk as biogenic precursor in the presence and absence of TiO 2 and used for the photocatalytic degradation of rhodamine-B under simulated solar light. Data showed that the prepared catalysts are mainly composed of biogenic silica and displayed mesoporous character with surface areas ranging from 65 to 174 m 2 g -1 . The obtained materials showed photocatalytic activity comparable to that of commercial TiO 2 -P25 powders for the degradation of rhodamine-B under sunlight. The calcination at 350 °C improved the photocatalytic activity of the biogenic precursor by three times in the absence of TiO 2 . At converse, calcination of sample SiO 2 -TiO 2 decreased the photoactivity due to the appearance of non-photoactive TiSiO 4 crystalline phases in the catalyst, as inferred by XRD and XPS. A reaction mechanism for rhodamine-B degradation excluding the deethylation pathway has been proposed, based on the evolution of the absorbance spectra of rhodamine-B upon the photocatalytic tests.-
Formato: dc.format125-135-
Idioma: dc.languageen-
Relação: dc.relationCatalysis Today-
Direitos: dc.rightsopenAccess-
Palavras-chave: dc.subjectArtificial solar light-
Palavras-chave: dc.subjectBiogenic silica-
Palavras-chave: dc.subjectPhotocatalysis-
Palavras-chave: dc.subjectRhodamine B-
Palavras-chave: dc.subjectRice husks-
Título: dc.titleSunlight photoactivity of rice husks-derived biogenic silica-
Tipo de arquivo: dc.typelivro digital-
Aparece nas coleções:Repositório Institucional - Unesp

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