Abstract
Herein, we report a microwave-assisted solvothermal ionic liquid method for rapid synthesis of aluminum fluorohydroxide AlFx(OH)3−x·nH2O single-crystalline octahedra with sizes of several micrometers using AlCl3·6H2O, urea and room-temperature ionic liquid 1-n-butyl-3-methyl imidazolium tetrafluoroborate (BMIM[BF4]) as starting reagents in water at 16°C for 15min. AlFx(OH)3−x·nH2O perfect single-crystalline octahedra with a well-defined morphology are obtained in a short period of microwave processing time. The effects of experimental parameters on the product are studied. A reaction mechanism for the formation of AlFx(OH)3−x·nH2O single-crystalline octahedra is discussed. The products are characterized with X-ray powder diffraction (XRD), Fourier transform infrared (FTIR) spectroscopy, scanning electron microscopy (SEM) and transmission electron microscopy (TEM).
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