2H-SnS assembled with petaloid 1T@2H-MoS nanosheet heterostructures for room temperature NO gas sensing.

In this study, we explored the gas-sensing capabilities of MoS petaloid nanosheets in the metallic 1T phase with the commonly investigated semiconducting 2H phase. By synthesizing SnS nanoparticles and MoS petaloid nanosheets through a hydrothermal method, we achieve notable sensing performance for NO gas at room temperature (27 °C). This investigation represents a novel study, and to the best of our knowledge no, prior similar investigations have been reported in the literature for 1T@2HMoS/SnS heterostructures for room temperature NO gas sensing. The formed heterostructure between SnS nanoparticles and petaloid MoS nanosheets exhibits synergistic effects, offering highly active sites for NO gas adsorption, consequently enhancing sensor response. Our sensor demonstrated a remarkable sensing response ( / = 7.49) towards 1 ppm of NO, rapid response time of 54 s, baseline recovery in 345 s, good selectivity and long-term stability, underscoring its potential for practical gas-sensing applications.