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]E China Univ Sci & Technol, Adv Mat Lab, Res Inst Ind Catalysis, Shanghai 200237, Peoples R 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：;WOS:【SCI-EXPANDED(收录号:WOS:000289322800021)】；

基金：This project was supported financially by the National Basic Research Program of China (No. 2010CB732300), the National Natural Science Foundation of China (20973058), the Commission of Science and Technology of Shanghai Municipality (08JC1407900, 10XD1401400) and "Excellent scholarship" of East China University of Science and Technology, China.

语种：英文

外文关键词：Oxides; Crystal growth; Nanostructures; Optical properties

摘要：Three-dimensional nanoflowers consisting of uniform crystalline SnO2 nanorods were spontaneously grown by the gradual hydrolysis of SnS32- in an aqueous system at 180 degrees 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 SnO2 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)(6)(2-) is achieved via the gradual hydrolysis of SnS32-, which is accounting for the oriented growth. The band gap energy (E-g) 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. Crown Copyright (C) 2011 Published by Elsevier By. All rights reserved.