Morphology controllable synthesis and luminescence properties of NaLa(WO4)2: Eu microcrystals

Abstract NaLa(WO 4 ) 2 :Eu microcrystals with shapes of four-arris shuttle, quadrangled star, and quadrangled dendrite were hydrothermally synthesized at 180 °C for 16 h. The concentration of the reactants and cetyltrimethyl ammonium bromide (CTAB) influenced the morphologies of the products. As La(NO 3 ) 3 , Na 2 WO 4 and CTAB was 0.375, 1.0, and 1.0 mmol, respectively, four-arris shuttle was obtained. As the concentration of the reactants doubled and the amount of CTAB ranged from 0.4 to 2.0 mmol, quadrangled dendrite, quadrangled star and four-arris shuttle were prepared, respectively. Luminescence intensity measurement of the three morphologies of NaLa(WO 4 ) 2 :Eu showed that quadrangled dendrite was the strongest and four-arris shuttle was the lowest.