水热法制备Sn掺杂TiO₂纳米颗粒及其丙酮传感器应用

Titanium dioxide, owing to its excellent sensitivity to volatile organic chemicals gases and physicochemical stability, is consideredto be one of the potential candidates for VOCs gases sensing applications. In this work, (1~5 mol%)Sn-doped porous TiO₂ nanoparticles were synthesized by hydrothermal method. By testing and studying the acetone sensitivity of Sn-doped TiO₂ based gas sensor, in the field of gas sensors, the potential application prospect of Sn-doped porous TiO₂ nanoparticles wasproved. For instance, the sensor test shows that Sn-doped significantly decreased the best work temperature. 3 mol % Sn-TiO₂ showed high response (S_R~42.35), fast response (16 s), recovery (8s) time good selectivity and long-term stability. In order to understand and authenticate the sensing mechanism, the structure and morphology of synthesized Sn-TiO₂ NPs were performed by XRD, XPS, SEM and TEM. Furthermore, a plausible sensing mechanism was discussed on basis of the obtained results.