Acta Chimica Sinica ›› 2012, Vol. 70 ›› Issue (17): 1812-1818.DOI: 10.6023/A12030053 Previous Articles     Next Articles

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岳丹a,c, 李春阳a, 鲁伟b, 张新磊a, 常加忠a, 王振领a   

  1. a 周口师范学院分析测试中心 周口 466001;
    b 香港理工大学应用物理学系 香港;
    c 郑州大学化学与分子工程学院 郑州 450001
  • 投稿日期:2012-03-24 发布日期:2012-07-26
  • 通讯作者: 王振领
  • 基金资助:
    项目受国家自然科学基金(No. 21171179)、河南省高校科技创新人才支持计划(No. 2011HASTIT030)和河南省高校青年骨干教师资助计划(No. 2009GGJS-119)资助.

Controllable Morphology, Phase and Luminescent Properties of Rare Earth Ion-doped LaPO4 Nano-structural Materials

Yue Dana,c, Li Chunyanga, Lu Weib, Zhang Xinleia, Chang Jiazhonga, Wang Zhenlinga   

  1. a Analytical and Testing Center, Zhoukou Normal University, Zhoukou 466001;
    b Department of Applied Physics, The Hong Kong Polytechnic University, Hongkong;
    c College of Chemistry and Molecular Engineering, Zhengzhou University, Zhengzhou 450001
  • Received:2012-03-24 Published:2012-07-26
  • Supported by:
    Project supported by the National Natural Science Foundation of China (No. 21171179), the Program for Science & Technology Innovation Talents in University of Henan Province (No. 2011HASTIT030) and the Foundation for University Key Teacher by Henan Province (No. 2009GGJS-119).

Rare earth ions (Ce3+, Tb3+) doped LaPO4 nano-structural materials were synthesized by hydrothermal treatment at 180 ℃ for 24 h, and characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), photoluminescence (PL) spectra and kinetic decay curves. The morphology, phase and luminescent properties of the obtained samples can be controlled through altering the variety of additives and doped rare earth ions, and the doping concentration of rare earth ions. The results indicate that when the doping concentration is as low as 5 mol%, Ce3+ or Tb3+ ion-doped LaPO4 materials are composed of single-crystalline nanorods with the length of 200~550 nm and the diameter of 12~30 nm, and have monoclinic phase structure. These nanorods with small size trend to assemble through shoulder-by-shoulder to form the nanorod bundles. When the concentration of Ce3+ ions increases from 5 to 30 mol%, the phase structure of LaPO4 nanorods transforms from monoclinic to hexagonal phase, whereas the doping concentration of Tb3+ ions at the same range can not result in the phase transformation. The length of the obtained nanorod bundles is at the range from 150 nm to 2.0 μm and the value can be controlled by altering the variety and the doping concentration of the doped rare earth ions, while the diameter of the nanorod bundles is mainly kept at 40~60 nm. The addition of different additives can improve the uniform feature of the obtained nanorod bundles and lead to the alteration of the length of these nanorod bundles. Under the excitation of ultraviolet light, Ce3+ or Tb3+ ion-doped LaPO4 nanorod bundles exhibit the characteristic emission of the corresponding doping ions, and the Ce3+ and Tb3+ ions co-doped samples exhibit strong green emission of Tb3+ ions due to the efficient energy transfer between Ce3+ and Tb3+ ions.

Key words: rare earth ion, LaPO4, nanorod bundle, doping, luminescence