| Full text | |
| Author(s): |
Praxedes, F. M.
;
Moreno, H.
;
Simoes, A. Z.
;
Teixeira, V. C.
;
Nunes, R. S.
;
Amoresi, R. A. C.
;
Ramirez, M. A.
Total Authors: 7
|
| Document type: | Journal article |
| Source: | Powder Technology; v. 404, p. 14-pg., 2022-05-16. |
| Abstract | |
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) | |
| FAPESP's process: | 18/24465-6 - Study of the optical and electrical behavior of advanced ceramic nanocomposites of CaCu3Ti4O12/reduced graphene oxide |
| Grantee: | Fernanda Malato Praxedes |
| Support Opportunities: | Scholarships in Brazil - Master |
| FAPESP's process: | 17/19143-7 - An experimental theoretical approach of conduction mechanisms and interface defects of heterostructure sensors based on P-N and N-N semiconductors from CeO2 matrices |
| Grantee: | Rafael Aparecido Ciola Amoresi |
| Support Opportunities: | Scholarships in Brazil - Post-Doctoral |