High-Performance Ammonia Detection of Polymeric BaTiO3/Ti3C2Tx MXene Composite-Based Sensor for Gas Emission and Leakage

NH3 is a dangerous gas, posing significant threats to human health and the delicate equilibrium of the environment. It emerges as a primary contributor to the noxious gas emissions prevalent in the selective catalytic reduction (SCR) processes employed by marine diesel engines. Its deleterious impact extends beyond the immediate surroundings, permeating the air with potential health hazards and exacerbating environmental degradation. The repercussions of NH3 emissions are far-reaching, impacting respiratory health, ecosystem vitality, and overall air quality. In this paper, BaTiO3/Ti3C2Tx composites were synthesized by anchoring BaTiO3 nanospheres on multilayer Ti3C2Tx nanosheets. The shortcomings of low sensitivity and poor recovery of the pristine Ti3C2Tx MXene gas sensor were improved. The BaTiO3/MXene composite sensor exhibits an improved response (10.43) to 20 ppm NH3 at room temperature, which is about 3.5 times higher than that of the pure MXene sensor. Furthermore, the BaTiO3/MXene composite sensor greatly improves the recovery time and exhibits outstanding repeatability, stability, and high selectivity to NH3. The exceptional characteristics of these composites underscore the potential for advancing novel sensitive materials in the form of BaTiO3/MXene composites, specifically tailored for high-performance NH3 sensors.