High Sensitive Triethylamine Gas Sensor Based on C@WS2/WO3 Composite

Abstract

WO3 is a promising candidate material for gas sensors due to its simple preparation, convenient operation, diverse structure and high electron mobility. However, WO3 gas sensors often have problems such as high operating temperature, high-energy consumption and sensitive characteristics easily affected by environmental humidity. In this paper, an effective method to improve the gas sensitivity of WO3 gas sensor by using composite carbon nanomaterials is explored. The results show that the composite of WS2/WO3 and carbon spheres, C@WS2/WO3 composite gas-sensitive material shows good sensing performance for triethylamine (TEA) at low temperatures. In addition, excellent TEA selectivity, good stability, and good response recovery characteristics are also achieved. Compared with pure WS2/WO3 material, the sensor response of C@WS2/WO3 composite is as high as 24.6 at the optimal operating temperature of 240[Formula: see text]C, compared with 21.81 of pure WS2/WO3 material.