Ppb-Level Xylene Gas Sensors Based on Co₃O₄ Nanoparticle-Coated Reduced Graphene Oxide(rGO) Nanosheets Operating at Low Temperature

Xylene is a toxic carcinogen, which may irritate eyes and respiratory tract, or damage the central nervous system. However, the traditional semiconductor gas sensor can only detect the ppm level of xylene gas, which cannot meet the building air quality monitoring requirements. Therefore, the development of low concentration gas detection of xylene gas sensor is necessary. In this article, a one-step hydrothermal method for the preparation of...