resumo
Mg/Al/Ce layered double hydroxides (LDHs) intercalated with carbonate and hydroxide anions were synthesized using co-precipitation and sol-gel method. The obtained materials were characterized by thermogravimetric (TG) analysis, X-ray diffraction (XRD) analysis, fluorescence spectroscopy (FLS) and scanning electron microscopy (SEM). The chemical composition, microstructure and luminescent properties of these LDHs were investigated and discussed. The Ce-3 (+) substitution effects were investigated in the Mg3Al1-xCex LDHs by changing the Ce-3 (+) concentration in the metal cation layers from 0.05 to 10 mol%. It was demonstrated, that luminescence properties of cerium-substituted LDHs depend on the morphological features of the host lattice.
palavras-chave
LIGHT-EMITTING-DIODES; X-RAY-DIFFRACTION; OPTICAL-PROPERTIES; GARNET PHOSPHORS; PHOTOLUMINESCENCE; FILMS; LDH; INTERCALATION; NANOCOMPOSITE; NANOPARTICLES
categoria
Chemistry; Materials Science; Mineralogy
autores
Smalenskaite, A; Vieira, DEL; Salak, AN; Ferreira, MGS; Katelnikovas, A; Kareiva, A
nossos autores
Andrei Salak
Investigador Principal
Daniel Eduardo Loureiro Vieira
Estudante de doutoramento
Mário Guerreiro Silva Ferreira
Professor(a) Jubilado(a)Grupos
G2 - Materiais Fotónicos, Eletrónicos e Magnéticos
G3 - Materiais Eletroquímicos, Interfaces e Revestimentos
agradecimentos
The work has been done in frame of the project TUMOCS. This project has received funding from the European Union's Horizon 2020 - Research and innovation Framework Programme under the Marie Sklodowska-Curie grant agreement No 645660. The financial support of P2020 COMPETE and FCT-Portugal through project POCI-01-0145-FEDER-016686 - PTDC/CTM-NAN/2418/2014 (NANOCONCOR) is also acknowledged.