Hydrothermal synthesis and photoluminescence behavior of CeO₂ nanowires with the aid of surfactant PVP

Ming-zai Wu~(1,2)),Yan-mei Liu~(1)),Peng Dai~(1)),Zhao-qi Sun~(1)),and Xian-song Liu~(1,2)) 1) Key Laboratory of Opto-electronic Information Acquisition and Manipulation,Anhui University,Hefei 230039,China 2) Engineering Technology Research Center of Magnetic Materials,Anhui University,Hefei 230039,China

摘 要：<正>Well-crystalline CeO₂ 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 CeO₂ 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 CeO₂ nanowires,which are believed to be related to the abundant defects in these nanostructures.

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