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Abstract
A new material (IL923SGs) composed of ionic liquids and trialkyl phosphine oxides
(Cyanex 923) for Y(III) uptake was prepared via a sol-gel method. The hydrophobic
ionic liquid 1-octyl-3-methylimidazolium hexafluorophosphate (C8mim+ PF6(-)) was used
as solvent medium and pore templating material. The extraction of Y(III) by IL923SGs
was mainly due to the complexation of metal ions with Cyanex 923 doped in the solid
silica. Ionic liquid was stably doped into the silica gel matrix providing a diffusion
medium for Cyanex 923, and this will result in higher removal efficiencies and excellent
stability for metal ions separation. IL923SGs were also easily regenerated and reused
in the subsequent removal of Y(III) in four cycles.