Abstract
TiO2:Eu3+ nanorods and nanobelts were successfully prepared through a simple hydrothermal method followed by a subsequent calcination process. On the basis of X-Ray diffraction, Fourier transform infrared spectroscopy, and transmission electron microscopy results, it can be assumed that the precursors have the structural formula of titanate (H2Ti2O5·H2O). The morphologies of the precursors are nanobelts and nanotubes. However, the nanobelts could transform to anatase TiO2 with the same morphology, while the nanotubes modulate from nanotubes to nanorods after an annealing process. Both the TiO2:Eu3+ nanorods and nanobelts exhibit strong red emission corresponding to the 5D0–7F2 transition of the Eu3+ ions under UV light excitation. However, TiO2:Eu3+ nanobelts showed higher emission intensity than that of the nanorods; the reason is that the nanobelts have less defects.
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