Portal de Periódicos da CAPES

Structural Changes and Spectroscopic Properties of Ce 3+ -Ion-Doped Sodium Yttrium Fluoride Nanocrystals: Influences of Sonication and Temperature

2009; American Chemical Society; Volume: 114; Issue: 2 Linguagem: Inglês

10.1021/jp910912c

1932-7455

Pushpal Ghosh, Arik Kar, Amitava Patra,

Glass properties and applications

The formation and decomposition of a layered structure of ammonium fluorolanthate during the preparation of Ce3+-doped sodium yttrium fluoride nanomaterials are investigated by XRD, TGA, TEM, FTIR, and photoluminescence spectroscopy. The influences of sonication and temperature of heating on the structural changes, that is, lattice strain and lattice parameters due to decomposition of the layered fluoride structure, have been demonstrated. The change of morphology from nanorods to nanoparticles after sonication is confirmed by TEM study. It is confirmed from FTIR study that interlayer water molecules are "icelike connective water" in nature and it generates strong crystal field effects on Ce3+ ions. The Ce3+ ion is used as a spectroscopic probe to confirm the presence of interlayer water and its influences on spectroscopic properties of Ce3+ ions.