The rational design of sensing materials with distinct morphologies and compositions is important to construct outstanding flexible gas sensors. Herein, a mesh polyaniline (PANI)/Ti₃C₂T_x composite nanofiber-based flexible sensor was constructed by electrospinning of PANI and few-layer Ti₃C₂T_x nanosheets. Sensing results indicated that this novel PANI/Ti₃C₂T_x flexible sensor demonstrated much higher NH₃ sensing response (2.3-fold improvement @ 20 ppm) in comparison with the sensor based on pure PANI nanofibers at 25 °C. Under different bending angles (maximum compression of 150°) and different bending times (maximum bending of 3200 times), the PANI/Ti₃C₂T_x flexible sensor maintained steady sensing behavior towards 20 ppm NH₃, which reflected its good flexible bending stability. The PANI/Ti₃C₂T_x flexible sensor also exhibited good selectivity, repeatability, as well as good long-term stability. The improvement of NH₃ sensing properties can be ascribed to the formation of Schottky junctions between PANI and Ti₃C₂T_x nanosheets, improved protonation degree of PANI, and the special three-dimensional mesh fiber structure. Our work revealed that the PANI/Ti₃C₂T_x composite nanofibers with interconnected mesh fiber structure have great potential to construct flexible NH₃ sensors.

合理设计具有不同形貌和成分的传感材料对于构建出色的柔性气体传感器非常重要。在此，通过聚苯胺 (PANI)和少层₃C₂T_x纳米片的静电纺丝构建了网状_{聚苯胺 (PANI)/Ti 3}C₂T_x。传感结果表明，这种新型 PANI/Ti₃C₂T_x柔性传感器表现出更高的 NH₃与 25 °C 下基于纯 PANI 纳米纤维的传感器相比，传感响应（2.3 倍改进 @ 20 ppm）。在不同弯曲角度（最大压缩150°）和不同弯曲次数（最大弯曲3200次）下，PANI/Ti ₃ C ₂ T _x柔性传感器对20 ppm NH ₃保持稳定的传感行为，这反映了其良好的柔性弯曲稳定。PANI/Ti ₃ C ₂ T _x柔性传感器还表现出良好的选择性、可重复性以及良好的长期稳定性。_{NH 3感测性能}的改善可归因于PANI和Ti _{3之间肖特基结的形成}C ₂ T _x纳米片，提高了PANI的质子化度，特殊的三维网状纤维结构。我们的工作表明，具有互连网状纤维结构的PANI/Ti ₃ C ₂ T _{x复合纳米纤维具有构建柔性 NH 3}传感器的巨大潜力。