Highly Uniform and Monodisperse Ba2ClF3 Microrods: Solvothermal Synthesis and Characterization

One-dimensional hexagonal Ba 2 ClF 3 microrods with highly uniform morphology and size have been successfully synthesized via a facile solvothermal method at a low temperature (160 °C). X-ray diffraction (XRD), scanning electron microscopy (SEM), and transmission electron microscopy (TEM) were used to characterize the samples. The synthesis process, based on a phase-transfer and separation mechanism, allows the control of properties such as particle size and shape in low dispersity by bonding the surfactant oleic acid to the crystal surface. We propose a possible formation process and preliminary growth mechanism for the microrods based on the effect of oleic acid. In the synthetic process, oleic acid as a surfactant plays a crucial role in confining the growth of the Ba 2 ClF 3 microcrystals. Under different reaction conditions, Ba 2 ClF 3 microcrystals with different shapes and sizes can be obtained.