![]() ![]() These unprecedented results reveal the potential of 2D MoS 2 to develop a low power portable gas sensor.ĢD MoS2 CVD NO2 gas sensor photo excitation selectivity. Moreover, the sensor shows reliable selectivity toward NO 2 against various other gases. This significant improvement in sensitivity (∼30%) and response time (∼88%) is attributed to the charge perturbation on the surface of the sensing layer in the context of NO 2/MoS 2 interaction under optical illumination. Further, under photo excitation, MoS 2 exhibits an enhancement in sensitivity with ultrafast response time of ∼29 s and excellent recovery to NO 2 (100 ppm) at room temperature. Thermal energy is enough to complete recovery, but it is at the expense of sensitivity. This work facilitates the gas sensing application of MXenes, and provides an avenue for the development of wireless sensing system in environmental monitoring and safety assurance. Incomplete recovery and high response time of ∼249 s of sensor are observed at room temperature. A portable, wireless NO2 monitoring system is demonstrated for gas leakage searching and dangerous warning based on Mo2TiC2Tx/MoS2 gas sensor. The sensor's performance is investigated to NO 2 at room temperature, under thermal and photo energy. Herein, we demonstrate ultrafast detection and reversible MoS 2 gas sensor at room temperature. However, the poor response time and incomplete recovery at room temperature restrict their application in high-performance practical gas sensors. At higher temperature (above 100 ☌) oxygen ions absorbed on the surface of the sensor layer 8. Two-dimensional materials have gained considerable attention in chemical sensing owing to their naturally high surface-to-volume ratio. MoS 2 based gas sensors are classified as metal oxide gas sensors. ![]()
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