Room Temperature Acetone-sensing Properties of Ru-doped MoSe2 Nanoflowers: Experimental and Density Functional Theory Study

A high-performance acetone gas sensor based on Ru-MoSe2 nanoflowers was synthesized by a facile hydrothermal method. The gas-sensing properties of MoSe2 and Ru-MoSe2 were investigated at room temperature. The Ru-MoSe2 based sensor exhibits high sensitivity, good selectivity, and stability, which effectively enhance the acetone sensing performance. The sensitivity of Ru-doped MoSe2 is more than six times that of MoSe2 sensor. In addition, the first-principle density functional theory was employed to explore the acetone sensing mechanism of Ru-MoSe2. The results indicate that the developed Ru-doped MoSe2 sensor has promising prospect in high-performance acetone detection, which is expected to be used for diagnosing diabetes in the future.