Synthesis and gas sensitivities of SnO2 nanorods and hollow microspheres

✍ Scribed by Haizhen Wang; Jianbo Liang; Hai Fan; Baojuan Xi; Maofeng Zhang; Shenglin Xiong; Yongchun Zhu; Yitai Qian

• Publisher: Elsevier Science
• Year: 2008
• Tongue: English
• Weight: 754 KB
• Volume: 181
• Category: Article
• ISSN: 0022-4596
• DOI: 10.1016/j.jssc.2007.11.010

✦ Synopsis

SnO 2 urchin-like structures composed of nanorods with diameters of 10-15 nm and lengths of 50-70 nm have been hydrothermally synthesized via a H 2 O 2 -assisted route without any surfactant, using SnCl 2 as raw material. With the addition of methenamine (HMT), SnO 2 hollow microspheres with diameters of 2-3 mm 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 SnO 2 materials exhibit good sensitivity to alcohol vapors, which may offer potential applications in gas sensors.