Synthesis of novel nano-flowers assembled with nano-petals array of stannous oxide

In this paper, stannous oxide (SnO) nano flowers self-assembled with nano petals have been successfully synthesized with template-free hydrothermal growth method by using SnCl2 center dot 2H(2)O and KOH as raw materials. The crystalline phase, morphology, particle sizes and component of the as-prepared materials were characterized by using X-ray diffraction (XRD), field-emission scanning electron microscopy (FESEM) and energy-dispersive X-ray spectroscopy (EDS). FESEM results had showed that the flower like SnO structure was in the range of 4-7 mu m. The average crystalline size of the tetragonal phase SnO nano-particles was calculated about 22 nm from the full-width at half-maximum of XRD. Furthermore, Ultraviolet-visible-near infrared (UV-vis-NIR) spectrophotometry was used to determine the transmittance behavior of SnO nano structures. Direct optical band gap of 3.13 eV was acquired by Davis-Mott model. Moreover, photoluminescence (PL) emission spectrum of SnO nano-petals at room temperature exhibited a very prominent violet emission at 398 nm that corresponds to direct band emission. (C) 2012 Elsevier RV. All rights reserved.