Thermally stable SiO2@TiO2core@shell nanoparticles for application in photocatalytic self-cleaning ceramic tiles

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Autor(es): dc.contributorUniversidade de São Paulo (USP)-
Autor(es): dc.contributorUniversidade Estadual Paulista (Unesp)-
Autor(es): dc.contributorUniversity of Peshawar-
Autor(es): dc.contributorUniversidade Federal de Mato Grosso do Sul (UFMS)-
Autor(es): dc.contributorFraunhofer Institute for Manufacturing Technology and Advanced Materials-
Autor(es): dc.creatorFerreira-Neto, Elias P. [UNESP]-
Autor(es): dc.creatorUllah, Sajjad [UNESP]-
Autor(es): dc.creatorMartinez, Vitor P.-
Autor(es): dc.creatorYabarrena, Jean M. S. C-
Autor(es): dc.creatorSimões, Mateus B.-
Autor(es): dc.creatorPerissinotto, Amanda P.-
Autor(es): dc.creatorWender, Heberton-
Autor(es): dc.creatorDe Vicente, Fabio S. [UNESP]-
Autor(es): dc.creatorNoeske, Paul-Ludwig M.-
Autor(es): dc.creatorRibeiro, Sidney J. L. [UNESP]-
Autor(es): dc.creatorRodrigues-Filho, Ubirajara P.-
Data de aceite: dc.date.accessioned2022-02-22T00:53:44Z-
Data de disponibilização: dc.date.available2022-02-22T00:53:44Z-
Data de envio: dc.date.issued2021-06-25-
Data de envio: dc.date.issued2021-06-25-
Data de envio: dc.date.issued2021-03-21-
Fonte completa do material: dc.identifierhttp://dx.doi.org/10.1039/d0ma00785d-
Fonte completa do material: dc.identifierhttp://hdl.handle.net/11449/208553-
Fonte: dc.identifier.urihttp://educapes.capes.gov.br/handle/11449/208553-
Descrição: dc.descriptionPhotocatalyst-coated self-cleaning ceramic tiles are in high demand for indoor and outdoor applications aimed at keeping a clean environment. Their industrial processing, however, often requires firing at temperature (1000-1200 °C) much higher than the thermal stability limits of common photocatalysts (<1000 °C) which results a significant loss in self-cleaning activity of the tiles. To address this issue, we have coated commercial ceramic tiles with thermally stable core@shell SiO2@TiO2 particles, which even after single-fire industrial treatment (1000-1140 °C), exhibit excellent self-cleaning activity, much higher than that of control tiles prepared with commercial benchmark P25 TiO2 photocatalyst. Importantly, the photocatalytic activity of SiO2@TiO2 particles, in both powder form and as coatings on ceramic tiles, enhanced with the increase in calcination temperature (to as high as 1000-1140 °C) which is in sharp contrast to the normal photocatalytic behavior of unsupported TiO2. This article explores in details the exceptionally high and industrially relevant thermal stability of silica-supported anatase nanocrystals (5 nm) (SiO2@TiO2) against phase transition and crystallite growth and brings new insight into the effect of core@shell configuration on the thermal stability and photoactivity of SiO2@TiO2 particles. A comprehensive discussion on the relationship between core@shell structure, thermal stability and photoactivity is presented. These SiO2@TiO2 particles with ideal physicochemical characteristics (small phase-pure anatase nanocrystals with higher resistance towards crystallite growth, phase transformation or surface-area loss upon calcination) are ideal photocatalytic materials for efficient photodegradation of organic pollutants for effective environmental remediation and other applications that involve high-temperature processing such as self-cleaning coatings and photocatalytic ceramics.-
Descrição: dc.descriptionInstitute of Chemistry of São Carlos University of São Paulo (USP)-
Descrição: dc.descriptionInstitute of Chemistry-São Paulo State University (UNESP)-
Descrição: dc.descriptionInstitute of Chemical Sciences University of Peshawar-
Descrição: dc.descriptionInstitute of Physics Federal University of Mato Grosso Do sul (UFMS), Av. Costa e Silva S/N-
Descrição: dc.descriptionInstitute of Geosciences and Exact Sciences Department of Physics São Paulo State University (UNESP)-
Descrição: dc.descriptionFraunhofer Institute for Manufacturing Technology and Advanced Materials-
Descrição: dc.descriptionInstitute of Chemistry-São Paulo State University (UNESP)-
Descrição: dc.descriptionInstitute of Geosciences and Exact Sciences Department of Physics São Paulo State University (UNESP)-
Formato: dc.format2085-2096-
Idioma: dc.languageen-
Relação: dc.relationMaterials Advances-
???dc.source???: dc.sourceScopus-
Título: dc.titleThermally stable SiO2@TiO2core@shell nanoparticles for application in photocatalytic self-cleaning ceramic tiles-
Tipo de arquivo: dc.typelivro digital-
Aparece nas coleções:Repositório Institucional - Unesp

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