Shape-selected synthesis, characterization and optical properties of KMnF3 micropolyhedra, microspheres and hollow microspheres

Micropolyhedra, microspheres and hollow microspheres of the cubic KMnF3 were selectively prepared by controllable, hydrothermal method at 120 °C. Manganese acetate and potassium fluoride were employed as the starting materials in the reaction, and variety of polyethylene glycol and dosage of citric acid were demonstrated to be responsible for the shape evolution. The samples were characterized by X-ray diffraction, scanning electron microscopy, X-ray photoelectron spectra, UV–vis absorption spectroscopy and photoluminescence spectra. A possible mechanism for the growth of KMnF3 microcrystal was proposed.

Graphical abstractMicropolyhedra, microspheres and hollow microspheres of the cubic KMnF3 were selectively prepared by controllable, hydrothermal method at 120 °C. The variety of polyethylene glycol and dosage of citric acid were demonstrated to be responsible for the shape evolution. It is interesting that these microstructures can be obtained by just modifying one reaction parameter in the reaction.Figure optionsDownload full-size imageDownload as PowerPoint slide