t-Se microspheres with holes: Hydrothermal synthesis and growth mechanism

In the present paper, novel t-Se microspheres with holes were successfully prepared via a facile solution-phase approach at 150 °C for 20 h, employing SeO2 and glucose as reagents, poly(vinylpyrrolidone) (PVP) as the surfactant. The phase and morphology of the product were characterized by means of powder X-ray diffraction (XRD), energy dispersive spectrometry (EDS), transmission electron microscopy (TEM), and scanning electron microscopy (SEM). The conversion from α-Se to t-Se was investigated by a series of experiments and a possible formation process was suggested based on the experimental results.