INQUISAL   20936
INSTITUTO DE QUIMICA DE SAN LUIS "DR. ROBERTO ANTONIO OLSINA"
Unidad Ejecutora - UE
artículos
Título:
Strong photoluminescence and sensing performance of nanosized Ca0.8Ln0.1Na0.1WO4 (Ln = Sm,Eu) compounds obtained by the dry "top-down" grinding method
Autor/es:
LÓPEZ, CARLOS A.; TORRES DELUIGI, MARIÁ DEL R.; GOMEZ, GERMÁN E.; AYSCUE, R. LEE; KNOPE, KARAH E.; NARDA, GRISELDA E.
Revista:
DALTON TRANSACTIONS
Editorial:
ROYAL SOC CHEMISTRY
Referencias:
Lugar: Cambridge; Año: 2019 vol. 48 p. 12080 - 12087
ISSN:
1477-9226
Resumen:
Two lanthanide doped nanosystems Ca0.8Ln0.1Na0.1WO4 (Ln = Eu, Sm), denoted as Eu@CWO and Sm@CWO, were prepared by a "top-down" approach in three simple steps: Activation, miniaturization by high-energy milling, and further calcination. The solids were thoroughly characterized by X-ray powder diffraction (XRPD) and Scanning-electron microscopy (SEM). Also, analyses of the structure of the compounds and the impact of milling on the crystallite shape and size were carried out through Rietveld refinements. Solid-state photoluminescence was studied in terms of excitation, emission, lifetimes (τobs) and europium-quantum yields. Finally, the Eu@CWO sample was employed as a potential water-stable chemical sensor towards toxic cations, showing a quenching effect in the presence of iron ions.