Controlled growth and fabrication of edge enriched SnS2 nanostructures for room temperature NO2 gas sensor applications

Abstract

Nanostructured SnS2 with enhanced edge sites was prepared and investigated the impact on NO2 gas molecules detection at room temperature (RT). SnS2 flower-like structure with exposed active sites provides more interaction channels for the NO2 gas molecules. The crystal orientation along with the (011) plane exhibits more active edge sites, thus enhancing the sensing performance of the flower-like structure. The fabricated SnS2 gas sensor showed more selective towards NO2 gas molecules. SnS2 flower-like structure provides more stability of 81.22% and 32.63% increased sensing response compared to the platelet-like structure. This result provides a pathway for the development of a practical room temperature NO2 gas sensor.