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Well-crystalline CeO_2 nanowires were prepared via a surfactant-assisted hydrothermal process.Reaction temperature and reaction time were changed for the determination of optimal synthesis parameters.The as-obtained products were characterized by X-ray diffraction (XRD),high-resolution transmission electron microscopy(HRTEM),and field emission scanning electron microscopy(FESEM).The results show that single crystal CeO_2 nanowires with high yield and good uniformity can be obtained hydrothermally at 180℃for 12 h with the aid of 2.0 g surfactant(polyvinyl pyrrolidone,PVP).The role of PVP was then discussed and a possible growth mechanism was proposed. Moreover,room temperature photoluminescence(PL) spectra were obtained for these CeO_2 nanowires,which are believed to be related to the abundant defects in these nanostructures.
Well-crystalline CeO2 nanowires were prepared via a surfactant-assisted hydrothermal process. Reaction temperature and reaction time were for the determination of optimal synthesis parameters. The as-obtained products were characterized by X-ray diffraction (XRD), high-resolution transmission electron microscopy (HRTEM), and field emission scanning electron microscopy (FESEM). The results show that single crystal CeO 2 nanowires with high yield and good uniformity can be hydrothermally at 180 ° C for 12 h with the aid of 2.0 g surfactant (polyvinyl pyrrolidone , PVP). The role of PVP was then discussed and a possible growth mechanism was proposed. Moreover, room temperature photoluminescence (PL) spectra were obtained for these CeO 2 nanowires, which are believed to be related to the abundant defects in these nanostructures.