Controlled synthesis and photoluminescence properties of BaXO4 (X = W, Mo) hierarchical nanostructures via a facile solution route

Shape-controlled synthesis of BaWO4 hierarchical nanostructures has been achieved in a mixed solvent of water and ethanol at room temperature. By simply adjusting the volume ratio of C2H5OH and H2O (R ratio), the size and shape of BaWO4 nanostructures, such as shuttle-like and ellipsoid-like, are successfully controlled. This simple method has been extended to synthesize BaMoO4 hierarchical nanostructures. Both BaWO4 and BaMoO4 hierarchical nanostructures exhibited new green emission peaks at 558 and 560 nm, respectively.