Hydrothermal synthesis and photoluminescence behavior of CeO_2 nanowires with the aid of surfactant PVP  

作　　者：Ming-zai Wu Yan-mei Liu Peng Dai Zhao-qi Sun Xian-song Liu 

机构地区：[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

出　　处：《International Journal of Minerals,Metallurgy and Materials》2010年第4期470-474,共5页矿物冶金与材料学报（英文版）

基　　金：supported by the National Natural Science Foundation of China(Nos.50901074 and 50672001);the Young Teacher Natural Science Fund of Anhui Province,China(No.2008jq1002).

摘　　要：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 CeO2 nanowires,which are believed to be related to the abundant defects in these nanostructures.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 CeO2 nanowires,which are believed to be related to the abundant defects in these nanostructures.

关 键 词：cerium oxide polyvinyl pyrrolidone HYDROTHERMAL PHOTOLUMINESCENCE 

分 类 号：TB383[一般工业技术—材料科学与工程] TQ326.6[化学工程—合成树脂塑料工业]