Design a SnWO4 coral-like nanostructure for triethylamine (TEA) sensing. (April 2022)

• Record Type: Journal Article
• Authors: Ma, N.N.; Ma, S.Y.; Wang, L.; Wang, X.P.; Liu, M.M.; Cai, Y.H.; Yang, T.T.
• Is Part Of: Vacuum. Volume 198(2022)
• Publication Date: 2022-04
• Subjects: SnWO4 coral-like -- Nanomaterial -- Hydrothermal method -- Triethylamine -- Gas sensor; Vacuum -- Periodicals; 621.55
• DOI: 10.1016/j.vacuum.2022.110913
• Languages: English
• ISSNs: 0042-207X

Abstract

Abstract: The gas sensors of semiconducting metal oxide are commonly deemed to be a promising sensor type. This work introduces a synthesizing method for SnWO4 sensor with coral-like by simple hydrothermal strategy. The acquired SnWO4 products were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM) and X-ray photoelectron spectroscopy (XPS). Tests revealed scheelite SnWO4 sample was successfully prepared and the vacancy oxygen and lattice oxygen respectively accounted for 74.35% and 25.65% in the oxygen element distribution. The gas sensing performances of SnWO4 coral-like were investigated via static gas sensor testing system. What's more, the response of SnWO4 sensor to 200 ppm triethylamine (TEA) is 17.58 at the optimum operating temperature (240 °C). And it expresses unique selectivity and long-term stability to triethylamine (TEA). This paper proves for the first time that SnWO4 nanomaterial can be used as a noval material in gas sensor field. Highlights: The SnWO4 sensor was prepared by the hydrothermal method and applied to the gas sensor to detect TEA for the first time. The sensor displayed low ppm gas detection, high selectivity, and good repeatability. The sensor baseline was low and stable during the experiment. The response value to 200 ppm triethylamine is 17.58, and its response and recovery time are 18 s and 17 s, respectively.