Synthesis, characterization and luminescence properties of ZrBDC:Eu³⁺,Tb³⁺ nanoscaled metal organic frameworks

Abstract

Zirconium nanoscaled metal-organic frameworks doped and co-doped with Eu 3+ and/or Tb 3+ (ZrBDC:Eu 3+ ,Tb 3+ ) 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:Eu 3+ ,Tb 3+ and ZrO2:Eu 3+ ,Tb 3+ nanoparticles have multicolour visible emissions at 473, 591, 612 and 701 nm assigned to the 5 D0 → 7 F1, 5 D0 → 7 F2, 5 D0 → 7 F3 and 5 D0 → 7 F4 transition of Eu 3+ ions and at 488, 582 and 621 nm assigned to 5 D4 → 7 F, 5 D4 → 7 F5; 5 D4 → 7 F4 and 5 D4 → 7 F3 transitions of Tb 3+ ions, respectively. The X-ray diffraction and field emission scanning electron microscopy results suggest that the ZrBDC:Eu 3+ ,Tb 3+ nanoscaled metal-organic frameworks can be used as precursors to design the tetragonal phase of ZrO2:Eu 3+ ,Tb 3+ nanoparticles with high purity and a narrow size distribution via heat treatment process. The as-prepared ZrO2:Eu 3+ ,Tb 3+ nanoparticles have size of about 10-15 nm with BET multipoint surface area of 162 m 2 /g.

Rapid annealing: minutes to enhance the green emission of the Tb3+-doped ZnGa2O4nanophosphor with restricted grain growth

“…[13][14][15] Among these, wet-chemical methods, such as hydrothermal/solvothermal synthesis, have frequently been employed. [16][17][18] However, such processing is time-consuming due to the slow kinetics at the temperatures employed. To enhance the kinetics, microwave heating can be introduced.…”