%0 Journal Article
%T Selective synthesis of SnO2 hollow microspheres and nano-sheets via a hydrothermal route
%A Yue Li
%A YanQun Guo
%A RuiQin Tan
%A Ping Cui
%A Yong Li
%A WeiJie Song
%J Chinese Science Bulletin
%@ 1861-9541
%D 2010
%I 
%R 10.1007/s11434-010-0004-y
%X We report a mild template-free hydrothermal route for selective synthesis of SnO2 hollow microspheres and nano-sheets using SnCl2 and NaOH as initial materials. By switching the solvent from water to ethanol, the formed SnO2 nanostructures changed from nano-sheets to hollow microspheres. The obtained nano-sheets were single crystalline in structure. On the basis of the characterization of intermediate products, the formation of SnO2 hollow microspheres was ascribed to a crystal growth process, while the formation of SnO2 nano-sheets was ascribed to the oxidation of SnO2 sheets during the hydrothermal process. Further characterization of the SnO2 hollow microspheres and nano-sheets by X-ray photoelectron spectroscopy and UV-Vis absorption spectroscopy reveals different optical absorption properties and valence band electronic structures. In addition, the SnO2 nano-sheets and hollow microspheres exhibit different sensing properties. The present work provides a facile and simple template-free method for the synthesis of nano-structured SnO2.
%K SnO2
%K hydrothermal
%K nanostructure
%K sensing
%U http://link.springer.com/article/10.1007/s11434-010-0004-y