Journal
MATERIALS LETTERS
Volume 63, Issue 24-25, Pages 2085-2088Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.matlet.2009.06.060
Keywords
Nanomaterials; Hydrothermal; SnO2; Microstructure; Nano-sheets
Funding
- Chinese Academy of Sciences
- Ningbo Natural Science Foundation [2007A610027, 2008A610047]
- K.C. Wang Magna Found in Ningbo University
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Square SnO2 nano-sheets have been successfully synthesized by a template-free hydrothermal method basing on the reaction between SnCl2 and NaOH in ethanol/water solution. The products have been characterized by X-ray diffraction, scanning electron microscope, and transmission electron microscope. The size and morphology of nano-sheets could be controlled by changing the ratio of ethanol to water. Compared experiments showed that the addition of NaOH was crucial to the formation of SnO2 nano-sheets, and the addition of glycol could induce the formation of cabbage-like structure. The nano-sheets show a strong absorption peak around 330 nm, corresponding to a band gap value of 3.75 eV. This blue shift of the band gap energy was possibly induced by the spatial confinement of excitons in the nano-sheet structures. (C) 2009 Elsevier B.V. All rights reserved.
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