• Home
  • Search Results
  • Molten salt synthesis and luminescent properties of YVO4:Ln (Ln = Eu3+, Dy3+) nanophosphors.

Molten salt synthesis and luminescent properties of YVO4:Ln (Ln = Eu3+, Dy3+) nanophosphors.

Journal of nanoscience and nanotechnology (2012-04-25)
Chenglu Liu, Fang Wang, Peiyun Jia, Jun Lin, Zhiqiang Zhou
ABSTRACT

Eu3+ and Dy(3+)-doped YVO4 nanocrystallites were successfully prepared at 400 degrees C in equal moles of NaNO3 and KNO3 molten salts. X-ray diffraction (XRD), Fourier transform infrared (FT-IR) spectroscopy, transmission electronic microscopy (TEM), photoluminescence (PL) spectrum and lifetime were used to characterize the nanocrystallites. XRD results demonstrate that NaOH concentration and annealing temperature play important roles in phase purity and crystallinity of the nanocrystallites, the optimum NaOH concentration and annealing temperature being 6:40 and 400 degrees C respectively. TEM micrographs show the nanocrystallites are well crystallized with a cubic morphology in an average grain size of about 18 nm. Upon excitation of the vanadate group at 314 nm, YVO4:Eu3+ and YVO4:Dy3+ nanocrystallites exhibit the characteristic emission of Eu3+ and Dy3+, which indicates that there is an energy transfer from the vanadate group to the rare earth ions. Moreover, the structure and luminescent properties of the nanocrystallites were compared with their bulk counterparts with same composition in detail.

MATERIALS
Product Number
Brand
Product Description

Sigma-Aldrich
Potassium nitrate, ACS reagent, ≥99.0%
Sigma-Aldrich
Potassium nitrate, ReagentPlus®, ≥99.0%
Sigma-Aldrich
Sodium nitrate, ACS reagent, ≥99.0%
Sigma-Aldrich
Yttrium(III) oxide, 99.99% trace metals basis
Sigma-Aldrich
Vanadium(V) oxide, ≥98%
Sigma-Aldrich
Potassium nitrate, puriss. p.a., ACS reagent, reag. ISO, reag. Ph. Eur., ≥99%
Sigma-Aldrich
Vanadium(V) oxide, 99.95% trace metals basis
Sigma-Aldrich
Potassium nitrate, BioReagent, suitable for cell culture, suitable for plant cell culture
Supelco
Mettler-Toledo Calibration substance ME 51143095, Potassium nitrate, traceable to primary standards (LGC)
Sigma-Aldrich
Sodium nitrate, ≥99.0%, suitable for plant cell culture
Sigma-Aldrich
Vanadium(V) oxide, ≥99.6% trace metals basis
Sigma-Aldrich
Sodium nitrate, 99.995% trace metals basis
Sigma-Aldrich
Sodium nitrate, BioXtra, ≥99.0%
Sigma-Aldrich
Potassium nitrate, 99.999% trace metals basis
Sigma-Aldrich
Potassium nitrate, BioXtra, ≥99.0%
Sigma-Aldrich
Yttrium(III) oxide, nanopowder, <50 nm particle size
Sigma-Aldrich
Potassium nitrate, 99.99% trace metals basis
Supelco
Nitrate ion standard solution, 0.01 M NO3-, for ion-selective electrodes
Sigma-Aldrich
Sodium nitrate, BioUltra, ≥99.0% (T)
Sigma-Aldrich
Sodium nitrate, anhydrous, free-flowing, Redi-Dri, ReagentPlus®, ≥99%
Sigma-Aldrich
Yttrium(III) oxide, 99.999% trace metals basis
Sigma-Aldrich
Potassium nitrate, puriss., meets analytical specification of Ph Eur, BP, USP, FCC, E252, 99.0-100.5%
Sigma-Aldrich
Yttrium(III) oxide, dispersion, 10 wt. % in isopropanol, nanoparticles, <100 nm (DLS), ≥99.9% trace metals basis
Sigma-Aldrich
Yttrium(III) oxide, sputtering target, diam. × thickness 2.00 in. × 0.25 in., 99.99% trace metals basis