Highly Sensitive Tin Oxide Hollow Microspheres and Nanosheets to Ethanol Gas Prepared by Hydrothermal Method

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Abstract:

In this study, we synthesized tetragonal-phase SnO2 with a variety of well-crystallized morphologies as solid microspheres, hollow microspheres and mixture of hollow microspheres and nanosheets via the hydrothermal method. The synthesized samples were characterized with XRD, SEM, and BET. SnO2 hollow microsphere structures have been hydrothermally synthesized by using urea and SnCl2 as raw materials. With the addition of cetyltrimethylammonium bromide (CTAB), nanostructures with morphologies of hollow microspheres and nanosheets were obtained. Also, when CTAB was added in the reaction solution without urea, SnO2 microsphere with a solid interior composed of nanoparticles were obtained. A possible formation mechanism of these samples was briefly discussed. The gas sensing properties of sensors based on these samples were investigated. The result revealed that sample with morphology of hollow microsphere and nanosheet calcined at 600 °C showed the highest sensitivity to ethanol due to the special morphology and absence of SnO phase.

Keywords: HOLLOW SPHERE; NANOSHEET; SENSING; SNO2

Document Type: Research Article

DOI: http://dx.doi.org/10.1166/jnn.2010.2579

Publication date: September 1, 2010

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  • Journal for Nanoscience and Nanotechnology (JNN) is an international and multidisciplinary peer-reviewed journal with a wide-ranging coverage, consolidating research activities in all areas of nanoscience and nanotechnology into a single and unique reference source. JNN is the first cross-disciplinary journal to publish original full research articles, rapid communications of important new scientific and technological findings, timely state-of-the-art reviews with author's photo and short biography, and current research news encompassing the fundamental and applied research in all disciplines of science, engineering and medicine.
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