Double-shell structured nanocomposites with magnetic and fluorescent properties

The synthetic strategy for the creation of Double-shell structure is based on a facile calcining process, in which carbon middle layer of Fe 3 O 4 @C@Y 2 O 3 :Eu 3+ @C@Y 2 O 3 :Eu 3+ composite nanostructures was calcined away. We obtained the Fe 3 O 4 @Y 2 O 3 :Eu 3+ @Y 2 O 3 :Eu 3+ nanocomposites with luminescent and magnetic properties. X-ray diffraction (XRD), transmission electron microscopy (TEM), vibrating sample magnetometer (VSM) and photoluminescence spectroscopy (PL) were used to analyze the structure, morphology, magnetic and luminescence properties of the composites. The nanocomposites has spherical morphology with narrow size distribution. In addition, they exhibit good magnetization with the saturation magnetization of 1.99 emu/g) and unique red emission for Eu 3+ at 610 nm.