title: Photoluminescence and Photocatalytic Activity of Bi2MoO6:Ln3+ Nanocrystals.
abstract: Sheet-like Bi2MoO6:Ln3+ nanocrystals were synthesized by a hydrothermal method. The crystalline size of Bi2MoO6:Ln3+ (Ln = Eu and Gd) nanocrystals changes gradually with the increasing of Ln3+ content in the reaction solutions. The photoluminescence properties of Bi2MoO6:Ln3+ nanocrystals were investigated in detail. In the emission spectra of Bi2MoO6:Eu3+ nanocrystals the 5D0-->7F2 is much stronger than the 5D0 --> 7F1 and is the strongest when the excitation is performed at 467 nm. The relative intensity of the transitions from Eu3+ increased with increasing Eu3+ concentrations, up to about 50 mol%, and then decreased abruptly. In the excitation spectra of Bi2MoOI:Eul+ (30%)/Gd3+ monitored at 618 nm, the 7F0 --> 5D2 (~467 nm) transition is dominating when the Gd3+ concentrations were 10% or 20%. When the Gd3+ concentration was 30%, the 7FO -> D1 (~538 nm) transition is dominating. In addition, the photocatalytic activity of Bi2MoO6:Eu3+ was evaluated by the degradation of rhodamine B (RhB) aqueous solution under simulated solar light. The best photocatalytic performance was observed when the Eu3+ concentration was 1%.
authors.forename: Li
authors.initials: L
authors.lastname: Feng
authors.forename: Mingxia
authors.initials: M
authors.lastname: Li
authors.forename: Kai
authors.initials: K
authors.lastname: Pan
authors.forename: Rong
authors.initials: R
authors.lastname: Li
authors.forename: Naiying
authors.initials: N
authors.lastname: Fan
authors.forename: Guofeng
authors.initials: G
authors.lastname: Wang
mesh_terms: D002384:Catalysis; D008027:Light; D049449:Luminescence; D008163:Luminescent Measurements / Q000379:methods*; D008422:Materials Testing; D053768:Metal Nanoparticles / Q000737:chemistry* / Q000528:radiation effects / Q000648:ultrastructure*; D010316:Particle Size; D012235:Rhodamines / Q000737:chemistry* / Q000302:isolation & purification / Q000528:radiation effects*
chemical_list: D012235:Rhodamines; C029773:rhodamine B