Synthesis of high-purity SnO2 nanobelts by using exothermic reaction

Abstract

This paper presents a new method to synthesize high-purity single-crystalline SnO2 nanobelts with rutile structure. The purity, morphology, crystal structure, and sizes of the as-grown SnO2 nanobelts are characterized by X-ray diffraction, energy-dispersive X-ray analysis, scanning electron microscopy, transmission electron microscopy, and Raman-scattering spectroscopy. The scanning electron microscopy and transmission electron microscopy reveal tetragonal SnO2 nanobelts of 50-120nm in width, 20-50nm in thickness, and 2-10m in length. The three observed Raman peaks at 475, 633, and 774cm-1 indicate the typical rutile structure of the SnO 2, which is in agreement with the X-ray diffraction results, and other peaks of impurity are not found. High-resolution transmission electron microscopy demonstrates that the nanobelts have a high degree of crystallinity, without typical imperfects in it. And the growth mechanism of the SnO 2 nanobelts is discussed. © 2011 Guodong Zhang et al.