Abstract
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.
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This work was supported by the Hundred Talents Program from the Chinese Academy of Sciences, “Qianjiang Talent Program” (Grant No.2009R10064) and Ningbo Natural Science Foundation (Grant Nos.2007A610027, 2008A 610047 and 2009A610030).
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Li, Y., Guo, Y., Tan, R. et al. Selective synthesis of SnO2 hollow microspheres and nano-sheets via a hydrothermal route. Chin. Sci. Bull. 55, 581–587 (2010). https://doi.org/10.1007/s11434-010-0004-y
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DOI: https://doi.org/10.1007/s11434-010-0004-y