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α-Fesub.2Osub.3/TiOsub.2/Tisub.3Csub.2Tsub.x Nanocomposites for Enhanced Acetone Gas Sensors
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α-Fesub.2Osub.3/TiOsub.2/Tisub.3Csub.2Tsub.x Nanocomposites for Enhanced Acetone Gas Sensors
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Journal Article
α-Fesub.2Osub.3/TiOsub.2/Tisub.3Csub.2Tsub.x Nanocomposites for Enhanced Acetone Gas Sensors
2024
Overview
Metal oxide semi-conductors are widely applied in various fields due to their low cost, easy processing, and good compatibility with microelectronic technology. In this study, ternary α-Fe[sub.2]O[sub.3]/TiO[sub.2]/Ti[sub.3]C[sub.2]T[sub.x] nanocomposites were prepared via simple hydrothermal and annealing treatments. The composition, morphology, and crystal structure of the samples were studied using XPS, SEM, EDS, XRD, and multiple other testing methods. The gas-sensing measurement results suggest that the response value (34.66) of the F/M-3 sensor is 3.5 times higher than the pure α-Fe[sub.2]O[sub.3] sensor (9.78) around 100 ppm acetone at 220°C, with a rapid response and recovery time (10/7 s). Furthermore, the sensors have an ultra-low detection limit (0.1 ppm acetone), excellent selectivity, and long-term stability. The improved sensitivity of the composites is mainly attributed to their excellent metal conductivity, the unique two-dimensional layered structure of Ti[sub.3]C[sub.2]T[sub.x], and the heterojunction formed between the nanocomposite materials. This research paves a new route for the preparation of MXene derivatives and metal oxide nanocomposites.
