| Texto completo | |
| Autor(es): |
Praxedes, F. M.
;
Moreno, H.
;
Simoes, A. Z.
;
Teixeira, V. C.
;
Nunes, R. S.
;
Amoresi, R. A. C.
;
Ramirez, M. A.
Número total de Autores: 7
|
| Tipo de documento: | Artigo Científico |
| Fonte: | Powder Technology; v. 404, p. 14-pg., 2022-05-16. |
| Resumo | |
Different strategies have been investigated to enhance optical properties of semiconductor oxides such as CaCu3Ti4O12, e.g., reduced graphene oxide. This research focuses on photoluminescent and photocatalytic properties of CaCu3Ti4O12-rGO composites. Micrometric CCTO and rGO particles were mixed to obtain compos-ites. (Micro)structure, photoluminescence, and photocatalytic properties were evaluated. CCTO-rGO composites displayed broad PL emission over the visible spectrum, useful for triggering photocatalytic applications (asymptotic to 380-750 nm). A shift in PL towards the violet region compared to pure CCTO along with an associated orange emission decrease may be ascribed to rGO activity as an electron donor/acceptor. Photocatalytic tests under UV light (325 nm) showed that 20%rGO (asymptotic to 25.88%) significantly improved rhodamine B removal/adsorption compared to pure CCTO (asymptotic to 9.64%). Results from this study show that CCTO-rGO composites may be a promising choice for future UV-visible light-driven photocatalytic devices with high adsorption/lower response time pro-moting sustainability in water purification methods and associated applications. (c) 2022 Elsevier B.V. All rights reserved. (AU) | |
| Processo FAPESP: | 18/24465-6 - Estudo do comportamento óptico e elétrico de nanocompósitos cerâmicos avançados de CaCu3Ti4O12/óxido de grafeno reduzido |
| Beneficiário: | Fernanda Malato Praxedes |
| Modalidade de apoio: | Bolsas no Brasil - Mestrado |
| Processo FAPESP: | 17/19143-7 - Uma abordagem teórico-experimental dos mecanismos de condução e defeitos de interface em heteroestruturas sensoras baseados em semicondutores P-N e N-N a partir de matrizes de CeO2 |
| Beneficiário: | Rafael Aparecido Ciola Amoresi |
| Modalidade de apoio: | Bolsas no Brasil - Pós-Doutorado |