Porous MoS2 microspheres decorated with Cu2O nanoparticles for ammonia sensing property.

Graphical abstract In the study, a facile, inexpensive solution approach was utilized to prepare novel 3D porous Cu 2 O-MoS 2 microspheres, which were employed for NH 3 gas detection. The results indicated the sensor fabricated by the porous Cu 2 O-MoS 2 microspheres exhibited fascinating gas-sensing properties to NH 3 with high gas response and short response time. Remarkably, the unique architecture and p-n heterojunction design and build play a vital role in the gas sensing properties improvement. Highlights • Novel 3D porous Cu 2 O-MoS 2 microspheres were synthesized via a facile solution route. • The Cu 2 O-MoS 2 microspheres based sensor exhibited excellent gas sensing performances. • The mechanism enhanced sensing properties was discussed in detail. Abstract A facile, inexpensive solution approach was utilized to prepare novel 3D porous Cu 2 O-MoS 2 microspheres, which were employed for NH 3 gas detection. Morphological characterizations indicated porous MoS 2 microspheres were decorated with numerous Cu 2 O nanoparticles. The fabricated gas sensor based on the Cu 2 O-MoS 2 microspheres possessed high gas response of 43 with fast response and recovery speed towards NH 3 , good reproducibility as well as satisfactory stability, which were mainly ascribed to the distinctive 3D porous microsphere architecture and the formation of p-n heterojunction at the interface between the n-type MoS 2 and p-type Cu 2 O. [ABSTRACT FROM AUTHOR]