Uniform and well-dispersed LaBO3 hierarchical architectures: synthesis, formation, and luminescence properties

Abstract

Well-dispersed straw-sheaflike LaBO₃ hierarchical architectures have been successfully synthesized by a designed hydrothermal conversion method. La(OH)₃ nanowires were first prepared through a simple hydrothermal process. Subsequently, uniform straw-sheaflike LaBO₃ architectures were synthesized at the expense of the La(OH)₃ nanowires during a hydrothermal conversion process. The whole process was carried out under aqueous conditions without the use of any organic solvent, surfactant, or catalyst. The conversion process from the La(OH)₃ precursor to LaBO₃ hierarchical architectures was investigated by time-dependent experiments. The as-obtained Eu³⁺ and Tb³⁺-doped LaBO₃ products show strong characteristic red and green emissions under ultraviolet excitation, which might find potential applications in fields of fluorescent lamps, display systems, and optoelectronic devices.