Large-scale and uniform Dy(OH)3
nanorods have been successfully prepared by a simple hydrothermal
method. Subsequent thermal decomposition of the as-prepared
Dy(OH)3 nanorods
produced Dy2O3
nanorods. X-ray diffraction (XRD), field-emission scanning electron microscopy (FESEM),
transmission electron microscopy (TEM), high-resolution transmission electron microscopy
(HRTEM), thermogravimetric analysis (TGA) and differential thermal analysis (DTA)
have been employed to characterize the products. XRD and SAED patterns showed the
Dy(OH)3
nanorods were a pure hexagonal phase and single-crystal in nature.
FMSEM and TEM images showed that the diameters of the
Dy(OH)3
nanorods ranged from 40 to 50 nm and the lengths ranged from 300 to 500 nm. The
Dy2O3
nanorods inherited their parents’ morphology, but their size is slightly shrunk in comparison with the
Dy(OH)3 nanorods. The
formation mechanism of Dy(OH)3
nanorods is discussed. Photoluminescence measurement shows that the nanorods have two
emission peaks around 490 and 575 nm, which should come from the electron transition from
4F9/2 to
6H15/2 levels
and 4F9/2
to 6H13/2
levels, respectively.
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