Morphology-controlled synthesis of NaGd(WO4)2:Eu3+ microcrystals by hydrothermal process

Average Structure, Local Structure, Photoluminescence, and NLO Properties of Scheelite Type NaCe(WO4)2

“…However, in this report we employed a template-free solvothermal method to synthesize a pure and stable phase of NaCe­(WO 4 ) 2 using two different solvents such as water and ethylene glycol. It is well-known that, in the solvothermal method, selection of suitable solvent plays a crucial role in determining particle size, shape, and morphology compared to that of other wet chemical synthesis. , Furthermore, the nucleation process strongly depends on the type of solvent used, as their properties such as dielectric constant and viscosity are found to have a potential effect on particle size and morphology. ,,, Hence in our case, reaction parameters such as time and temperature were maintained to 30 h at 200 °C. Under these conditions, homogeneous smaller particles are formed when ethylene glycol is used as a solvent compared to that in water .…”

“…6,8 Furthermore, the nucleation process strongly depends on the type of solvent used, as their properties such as dielectric constant and viscosity are found to have a potential effect on particle size and morphology. 3,21,22,36 Hence in our case, reaction parameters such as time and temperature were maintained to 30 h at 200 °C. Under these conditions, homogeneous smaller particles are formed when ethylene glycol is used as a solvent compared to that in water.…”

“…For instance, Dirany et al investigated the tunable morphologies of NaCe­(WO 4 ) 2 via an EDTA assisted method and showed variation in optical absorption properties with morphology . Nevertheless, use of additives such as surfactants or structure directing agents during synthesis was found to reduce fluorescence intensity in most of the luminescent materials. , Very recently Shimemura et al reported ACe­(WO 4 ) 2 where A = Li + , Na + , and K + by a conventional method and showed the effect of an alkali metal ion on emission properties. However, the spectral properties of the Ce 3+ ion in the Scheelite-like NaCe­(WO 4 ) 2 structure are not clear and the nonlinear optical properties have not been studied to date.…”

Hydrothermal synthesis of NaY(WO4)2:Tb3+ powders with assistance of surfactant and luminescence properties

“…Over the past few years, rare earth doped materials have been studied widely because of their interesting optical properties, such as large Stokes shift, long lifetime, sharp and abundant emission colors deriving from their unique intra 4f transitions, which induces the potential applications in the fields of display systems and other optoelectronic devices [1][2][3]. Till now, lots of rare earth doped inorganic materials, including borate, phosphate, aluminate, tungstate, and silicate have been synthesized by different methods [1][2][3][4][5][6][7][8][9].…”

“…Till now, lots of rare earth doped inorganic materials, including borate, phosphate, aluminate, tungstate, and silicate have been synthesized by different methods [1][2][3][4][5][6][7][8][9]. As one kind of important solid-state materials, rare-earth tungstates have gained much attention because of their remarkable properties in the areas of catalysts, quantum electronics and lasers [7].…”