Journal
JOURNAL OF SOLID STATE CHEMISTRY
Volume 181, Issue 1, Pages 122-129Publisher
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jssc.2007.11.010
Keywords
SnO2; nanorods; hollow microspheres; photoluminescence; gas sensitivity
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SnO2 urchin-like structures composed of nanorods with diameters of 10-15nm and lengths of 50-70nm have been hydrothermally synthesized via a H2O2-assisted route without any surfactant, using SnCl2 as raw material. With the addition of methenamine (HMT), SnO2 hollow microspheres with diameters of 2-3 pin and shell thickness of 60-140 nm were also prepared. The as-obtained products were examined using diverse techniques including X-ray powder diffraction (XRD), Raman spectroscopy, field-emission scanning electron microscopy (FE-SEM), transmission electron microscopy (TEM), selected-area electron diffraction (SAED), high-resolution TEM and photoluminescence spectra. The gas sensitivity experiments have demonstrated that the as-synthesized SnO2 materials exhibit good sensitivity to alcohol vapors, which may offer potential applications in gas sensors. (c) 2007 Elsevier Inc. All rights reserved.
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