Modified Sn-doped LaCrO 3 nanostructures: focus on their characterization and applications as ethanol sensor at a lower temperature

摘要

The present work emphasizes the effect of the use of Sn, with different concentrations, over the structural properties and sensing applications of LaCrO~(3). In this work, LaCrO~(3)nanostructures were modified with different concentration of Sn (0.2?M?%, 0.4?M?%, 0.6?M?% and 0.8?M ?%).Different modified Sn-doped LaCrO~(3)was synthesized by sol–gel method and followed by preparation of thick films via a conventional screen printing approach. The characterizations done by means of X-ray diffraction (XRD), energy-dispersive X-ray (EDX), scanning electron microscopy (SEM) and transmission electron microscopy (TEM) revealed the confirmation of a Sn-doped LaCrO~(3)crystal structure and its morphology, respectively. These oxides were formulated to identify various air pollutants such as CO~(2), ethanol, H~(2)S, NH~(3), NO~(2,)and acetone. The Sn-doped LaCrO3 with 0.4?M?% Sn displayed higher gas response to ethanol vapor at the range of 150–250?°C. The sensors additionally demonstrated proper recovery and acceptable stability. Graphic abstract The graphical abstract demonstrates the in situ synthesis of Sn-doped LaCrO~(3)by sol–gel method. Similarly, it shows its characterization and finally, the thick films of doped Sn demonstrate best selectivity for ethanol.