Synthesis of Sb2Te3 Hierarchical Nanostructures by Divalent Germanium Ion‐assisted Solution Method

摘要

A simple and convenient divalent germanium iona??assisted low temperature (100a???°C) liquid phase synthesis of Sb2Te3 flowerlike nanostructures with diameters of 300a??500a??nm by controlled agglomeration is described. Transmission electron microscopy (TEM) images showed that the flakes were formed by twoa??dimensional aggregation of nanocrystals smaller than 10a??nm. Subsequent experiments performed without the use of germanium source gave only platelike architectures of irregular size and shape. The morphology and composition of these synthesized Sb2Te3 nanoflowers were characterized by powder Xa??ray diffraction, scanning electron microscope, TEM, higha??resolution transmission electron microscopy, differential scanning calorimetry, energya??dispersive Xa??ray spectroscopy, and Xa??ray photoelectron spectra. The atomic ratio of Sb to Te is very close to 23 stoichiometry. A possible mechanism is also proposed for the formation of these hierarchical nanostructures.