SnO2 nanorods based sensing material as an isopropanol vapor sensor

Well-crystalline tin oxide nanorods assembled with SnO2 nanocrystals were prepared by calcination of SnC2O4 nanorods synthesized by a chemical precipitation method using SnCl2 center dot 2H(2)O and PEG 400 as precursors. The phase and morphology of the resulting material were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM) and X-ray photoelectron spectrum (XPS). Indirect-heating sensors using SnO2 nanorods as sensitive materials were fabricated on an alumina tube with Au electrodes and platinum wires. The as-fabricated sensor based on SnO2 nanorods showed high response, fast response and recovery toward isopropanol gas, making them promising candidates for practical detectors of isopropanol gas.