LAUSR

The facile and green synthesis of novel structured inorganic micro/nanocrystals is prospective in the field of functional materials. Herein, uniform porous/hollow YVO4 submicro-ellipsoids were developed via a surfactant-free and one-pot aqueous-based strategy using Y2(OH)5NO3·nH2O (LYH) as a precursor. We propose a possible morphological evolution mechanism related to quick assembly, followed by the Ostwald ripening process based on a series of time-dependent investigations. Besides, we propose a possible transformation process from LYH to YVO4 on the basis of the high structural matching between [001]LYH and [110]YVO4. Furthermore, we found that the successful synthesis of porous/hollow YVO4 ellipsoids remarkably depended on the precise tuning of the reaction parameters (reaction temperature, pH value, and Na+ concentration). In addition, multicolor down-conversion emissions were realized via lanthanide ion (Ln3+: Eu3+, Sm3+, and Dy3+) doping. The as-synthesized porous/hollow products may be ideal candidates for bio-/energy-related applications.