Synthesis, characterization and luminescence properties of ZrBDC:Eu ³⁺ ,Tb ³⁺ nanoscaled metal organic frameworks

摘要： Zirconium nanoscaled metal–organic frameworks doped and co-doped with Eu3+ and/or Tb3+ (ZrBDC:Eu3+,Tb3+) have been synthesized by hydrothermal method using 1,4-dicarboxylic acid as linkers. The luminescence spectra obtained indicated that under 254 nm excitation, the as-synthesized ZrBDC:Eu3+,Tb3+ and ZrO2:Eu3+,Tb3+ nanoparticles have multicolour visible emissions at 473, 591, 612 and 701 nm assigned to the 5D0 → 7F1, 5D0 → 7F2, 5D0 → 7F3 and 5D0 → 7F4 transition of Eu3+ ions and at 488, 582 and 621 nm assigned to 5D4 → 7F, 5D4 → 7F5; 5D4 → 7F4 and 5D4 → 7F3 transitions of Tb3+ ions, respectively. The X-ray diffraction and field emission scanning electron microscopy results suggest that the ZrBDC:Eu3+,Tb3+ nanoscaled metal–organic frameworks can be used as precursors to design the tetragonal phase of ZrO2:Eu3+,Tb3+ nanoparticles with high purity and a narrow size distribution via heat treatment process. The as-prepared ZrO2:Eu3+,Tb3+ nanoparticles have size of about 10-15 nm with BET multipoint surface area of 162 m2/g.