SnO2 nanoparticles-modified 3D-multilayer MoS2 nanosheets for ammonia gas sensing at room temperature

In this work, MoS2 nanosheets decorated with SnO2 nanoparticles were prepared via a facile two-step hydrothermal method, which possesses a proposed sensing composite structure of supporting layer/sensitive dots. The SnO2/MoS2 nanocomposites exhibited an excellent sensing response (2080.36) toward 200 ppm NH3, which was ∼27.5 times higher than that of pristine MoS2 films, a fast response/recovery time (23/1.6 s) toward 50 ppm at room temperature...