Novel Microwave-Induced Combustion Synthesis of SnO2 Nanoparticles for Selective Sensing of CO Using Tin Chloride

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A novel technique of chloride solution combustion synthesis (CSCS) is employed for preparation of SnO2 nanoparticles, using SnCl4 and sorbitol as a novel precursor and a fuel, respectively. Ammonium nitrate is also used as a combustion aid. The solution combustion synthesis is a single-step and simple method for nanoparticles synthesis. However, it commonly uses nitrate precursors. In this study tin chloride is used in CSCS method for the first time, employing ammonium nitrate as a combustion aid. The nanoparticles are characterized by means of XRD, SEM, EDS and BET and applied in sensing of carbon monoxide and methane. The molar ratio of fuel plus oxidant to SnCl4 (Ψ) and the ratio of fuel-to-oxidant (φ) were varied in the modified CSCS technique. The smallest nanoparticles size, i.e., 3.9 nm with 220 m2·g−1 obtained at Ψ = 1 and φ = 1. The sensor fabricated based on the SnO2 nanoparticles obtained by CSCS method shows 2–3 times higher sensitivity to CO than the one obtained by the conventional sol–gel method. The CSCS sensors show high sensitivity to CO at temperatures lower than 300 °C, at which insignificant sensitivity to methane is observed. This makes the sensor selective to CO in presence of methane.


Document Type: Research Article


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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