Synthesis and photoluminescence of novel 3D flower-like CaMoO4 architectures hierarchically self-assembled with tetragonal bipyramid nanocrystals

Abstract Novel three-dimensional (3D) hierarchical flowerlike CaMoO 4 microarchitectures self-assembled with octahedral nanocrystals (tetragonal bipyramid) (OF-CaMoO 4 ) have been synthesized via β-Cyclodextrin-assisted precipitation–hydrothermal process. The OF-CaMoO 4 microflowers have a diameter of about 2–4 μm, and are composed of octahedral nanocrystals of about 200–500 nm that connect to each other by surface-to-surface attachments. β-Cyclodextrin plays a crucial role in achieving the good dispersibility and octahedral nanocrystals of the final product. The OF-CaMoO 4 superstructures display an enhanced photoluminescence. Our work provides an easy and novel synthetic route for the controllable construction of inorganic phosphors with hierarchical architectures.