Shape-controlled synthesis of monodispersed nano-/micro- NaY(MoO4)2 (doped with Eu3+) without capping agents via a hydrothermal process

Abstract

Nearly monodisperse NaY(MoO 4 ) 2 architectures with various shapes have been selectively prepared on a large scale by a capping agent free hydrothermal process using Y(OH) 3 nanorods as a precursor. The molar ratio of Na 2 MoO 4 /Y(OH) 3 , the volume ratio of water/ethanol in the mixed solvents and temperature have comprehensive and crucial influences on the formation of multi morphologies of NaY(MoO 4 ) 2 . The formation of multi morphologies is explained mainly from the viewpoint of the effective concentration of MoO 4 2À ions. At high temperature, high Na 2 MoO 4 /Y(OH) 3 ratio and high water/ethanol volume ratio, the effective concentration and reactivity of reactants, especially MoO 4 2À ions, are improved, which is beneficial to the growth of 3D NaY(MoO 4 ) 2 architectures. Under UV excitation, without further annealing treatment, NaY(MoO 4 ) 2 :0.05Eu 3+ bipyramid micro samples show strong red emission, corresponding to the characteristic lines of Eu 3+ .

Photoluminescence properties of a novel red fluoride K2LiGaF6:Mn4+nanophosphor

“…Currently most of the available red phosphors still have certain problems. 10,11 For example, oxide phosphors [12][13][14][15][16] cannot absorb blue light efficiently and sulde phosphors [17][18][19] are unstable because of their high sensitivity to hydrolysis reactions. As for the nitride phosphors, [20][21][22][23] they have overlapping re-absorption with the yellow phosphor and the synthesis conditions are rigid.…”

EDTA-mediated morphology and tunable optical properties of Eu3+-doped NaY(MoO4)2 phosphor

“…NaY(MoO 4 ) 2 , which shares scheelite-like structures, shows excellent thermal and hydrolytic stability and is demonstrated to be an efficient host for other lanthanide ions to produce various luminescence properties [22,27,[39][40][41][42]. The Eu 3?…”

Controllable synthesis and luminescent properties of rare earth doped Gd2(MoO4)3 nanoplates

“…As a group of inorganic new rare earth luminescent materials, due to its stability light spectrum, superior luminescent performance, good color change effect and the typical activation characteristics, molybdates have shown great application potential on luminescence materials. Nowdays, the shape control of inorganic nano-/micromaterials has attracted considerable attention, due to the shape, size, and morphology are tightly related to the property of nanomaterials, which have giant effects on their chemical, physical, magnetoelectric, photocatalytic, fluorescent and catalytic properties [22,23]. Therefore, it is badly in need of to synthesize inorganic nanocrystals with a controlled morphology [24,25].…”