High Gas Response Performance Based on Reduced Graphene Oxide/SnO₂ Nanowires Heterostructure for Triethylamine Detection

SnO₂ nanowires are locally synthesized by a simple thermal evaporation method and its growth mechanism is confirmed. Here, we present a simple strategy for realizing reduced graphene oxide (RGO)/SnO₂ nanowires heterostructure. As expected, the heterostructure gas-sensing response is up to 63.3 when the gas concentration of trimethylamine (TEA) is 50 ppm, and it exhibits an excellent dynamic response with high stability at 180 °C. A low detection limit of 50 ppb level is fully realized. Compared to SnO₂ nanowires, the sensing performance of the RGO/SnO₂ heterostructure-based sensor is greatly enhanced, which can be ascribed to the RGO and the heterostructure. The RGO/SnO₂ composite engineering poses an easy way to make full use of the advantages originating from RGO and heterostructure.