Abstract
Samarium fluorides and europium fluorides have been successfully synthesized via a salt-assisted sonochemical method in an aqueous solution at room temperature without any templates or organic additives. The morphologies and chemical compositions of as-obtained products changed with the variation of reaction parameters, including the molar ratio of F/Ln (R(F/Ln)) and the concentration of inorganic salt NaNO3. The products presented diverse morphologies such as disk, doughnut, sphere, cube, bundle, shuttle, spindle, and tube-like structures. The value of x/y (r(x/y)) for NaxLnyFx+3y (Ln=Sm, Eu) increased with the increase of R(F/Ln) and NaNO3 concentration. Photoluminescent properties of europium fluorides have been further investigated via the PL test and proved to be dependent on the morphologies and compositions of the products.
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