Cu₂O/Ti₃C₂Tnanocomposites for detection of triethylamine gas at room temperature

Triethylamine gas is one of the harmful volatile organic compounds for human health and the ecological environment. Therefore, in order to prevent the detrimental effects of triethylamine gas, it has greatly requirement to be accurately detected. Unfortunately, Cu₂O has a low triethylamine gas response and slow recovery. Because of this, we prepared Cu₂O/Ti₃C₂Tnanocomposites by a facile ultrasonication technique. Cu₂O is uniformly dispersed on the surface and interlayers of multilayer Ti₃C₂Tto form a stable hybrid heterostructure. The optimized Cu₂O/Ti₃C₂Tnanocomposite sensor's response to 10 ppm triethylamine at room temperature is 181.6% (∣R_g-R_a∣/R_a × 100%). It is 3.5 times higher than the original Cu₂O nanospheres (52.1%). Moreover, due to the characteristics of high carrier migration rate and excellent conductivity of Ti₃C₂T, the response recovery rate (1062 s/74 s) of Cu₂O/Ti₃C₂T_xcomposites is greatly improved than pristine Cu₂O (3169 s/293 s). In addition, Cu₂O/Ti₃C₂Tnanocomposites sensor also shows excellent repeatability, outstanding selectivity, and long-term stability. Thus, the Cu₂O/Ti₃C₂Tnanocomposites sensor has broad application prospects for detecting triethylamine gas at room temperature.