The current two-dimensional (2D) material based NH₃ sensors generally suffer from low response values and sluggish recovery dynamics, which is resulted from their inferior conductivity. Herein, high conductivity (0.045 S/m) of 2D hydrogen substituted graphyne (HsGY) nanosheets are successfully synthesized employing aqueous/organic interface method and using them for the first time for the detection of NH₃ at room temperature. The resultant gas sensing performance shows that the 2D HsGY nanosheets exhibit a high gas response value (4.9) to 100 ppm NH₃ and fast recovery time (108 s) at the room temperature. The NH₃ gas sensing mechanism is discussed by utilizing density functional theory (DFT) calculations. The present study provides novel gas sensing material for the development of high-performance room temperature NH₃ sensors.

当前基于二维（2D）材料的NH ₃传感器通常由于其较差的电导率而导致响应值低和恢复动力学缓慢。在此，采用水/有机界面法成功合成了高电导率（0.045 S/m）的二维氢取代石墨烯（HsGY）纳米片，并首次将其用于室温下NH ₃的检测。所得的气敏性能表明，2D HsGY纳米片在室温下对100 ppm NH ₃表现出高气体响应值（4.9）和快速恢复时间（108 s）。利用密度泛函理论(DFT) 计算讨论了NH ₃气体传感机制。本研究为高性能室温NH ₃传感器的开发提供了新型气敏材料。