Exploring Gas Sensing Applications and Characterization of Nanostructured Magnesium Orthostannate Synthesized Through Hydrothermal Method
Abstract
In this present work, nanostructured magnesium orthostannate (Mg2SnO4) was synthesized by hydrothermal method with magnesium chloride (MgCl2) as a source of Mg and tin chloride (SnCl4) as a source of Sn used at different concentrations. The thick films of Mg2SnO4 formed using the screen printing method. The structural properties and crystalline sizes of Mg2SnO4 (samples S1, S2, S3, S4) were determined using the Debye-Scherrer equation and confirmed through X-ray diffraction analysis. The surface morphology of fabricated thick films was analyzed by scanning electron microscopy (SEM). The chemical composition of synthesized material was detected by energy dispersive spectroscopy analysis (EDS). The particle size and interplaner distance of the Mg2SnO4 nanomaterial were determined by transmission electron microscopy (TEM) and selected area diffraction pattern (SAED). The films were tested for application as a gas sensor for different gases like nitrogen dioxide (NO2), ammonia (NH3), hydrogen Sulphide (H2S), ethanol (CH3CH2OH), and methanol (CH3OH). The Mg2SnO4 film sensor shows the maximum sensitivity to CH3OH gas at an operating temperature of 120 with 300 ppm concentration as compared with other gases. The Mg2SnO4 sensor shows rapid response and recovery time. The other parameters, such as the repeatability and stability of the sensor were also recorded.