文献类型：期刊文献

英文题名：Evolution of SnO2 nanoparticles into 3D nanoflowers through crystal growth in aqueous solution and its optical properties

作者：Wang, Lei[1]; Ren, Jiawen[1]; Liu, Xiaohui[1]; Lu, Guanzhong[1]; Wang, Yanqin[1]

机构：[1] Lab for Advanced Materials, Research Institute of Industrial Catalysis, East China University of Science and Technology, Meilong Road 130, Shanghai 200237, China

年份：2011

卷号：127

期号：1-2

起止页码：114

外文期刊名：Materials Chemistry and Physics

收录：EI(收录号：20111313858324)

语种：英文

外文关键词：Energy gap - Photoluminescence - Nanorods - Crystalline materials - Nanoflowers - Solutions - Hydrolysis - Crystal growth

摘要：Three-dimensional nanoflowers consisting of uniform crystalline SnO 2 nanorods were spontaneously grown by the gradual hydrolysis of SnS32- in an aqueous system at 180 °C. The resulting material was characterized by using SEM, TEM, EDX, SAED, XRD, and UV-vis techniques. The results clearly show that these uniform crystalline SnO 2 nanorods grow in the [0 0 1] direction with the enclosing facets of {1 1 0}. It is believed that the controlled release of Sn(OH)62- is achieved via the gradual hydrolysis of SnS32-, which is accounting for the oriented growth. The band gap energy (Eg) of the SnO2 nanoflowers deduced from the diffused UV-vis spectrum is 3.60 eV and the photoluminescence spectra of the nanoflowers shows three emission peaks centered at wavelengths of 355, 390 and 465 nm, respectively. ? 2011 Published by Elsevier B.V. All rights reserved.