Room Temperature Acetone-Sensing Properties of Ru-Doped MoSe₂ Nanoflowers: Experimental and Density Functional Theory Study
Sujing Yu, Dongzhi Zhang, Qi Li
Abstract
A high-performance acetone gas sensor based on Ru-MoSe <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sub> nanoflowers was synthesized by a facile hydrothermal method. The gas-sensing properties of MoSe <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sub> and Ru-MoSe <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sub> were investigated at room temperature. The Ru-MoSe <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sub> based sensor exhibits high sensitivity, good selectivity, and stability, which effectively enhance the acetone sensing performance. The sensitivity of Ru-doped MoSe <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sub> is more than six times that of MoSe <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sub> sensor. In addition, the first-principle density functional theory was employed to explore the acetone sensing mechanism of Ru-MoSe <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sub> . The results indicate that the developed Ru-doped MoSe <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sub> sensor has promising prospect in high-performance acetone detection, which is expected to be used for diagnosing diabetes in the future.