2D/2D BiSe/SnSe heterostructure with rapid NO gas detection.

Heterostructure engineering is crucial for enhancing gas sensing performance. However, achieving rapid response for room-temperature NO sensing through rational heterostructure design remains a challenge. In this study, a BiSe/SnSe 2D/2D heterostructure was synthesized by hydrothermal method for the rapid detection of NO at room temperature. By combining BiSe nanosheets with SnSe nanosheets, the BiSe/SnSe sensor demonstrated and the lowest detection limit for NO a short response time (15 s) to 10 ppm NO at room temperature, reaches 25 ppb. Furthermore the sensor demonstrates significantly larger response to NO than to other interfering gases, including 10 ppm NO, HS, NH, CH, CO, and SO,demonstrating its outstanding selectivity. And we discuss the mechanism of related performance enhancement.