An excellent triethylamine sensor based on composite nanotube WO3/SnO2

Triethylamine (TEA) is a volatile organic compound, widely used in production and life. But as a strong irritating and flammable gas, it is a serious threat to people 's life safety, so the development of high-performance TEA gas sensor is of great significance to human life and production. In this work, pure WO 3 and WO 3 /SnO 2 composite nanofibers were prepared by electrospinning method. The morphology and microstructure of the obtained samples were characterized by SEM, XRD, XPS, PL, etc. Then the gas sensitivity of the samples was studied. The results show that both pure WO 3 nanofibers and composite nanofibers have good selectivity for TEA. But compared with pure WO 3 nanofibers, WO 3 /SnO 2 nanofibers have higher response, faster response/recovery time (14 s/22 s) and better stability. The optimal temperature is 260 degrees C, 20 degrees C lower than that of pure WO 3 nanofibers, and the response to 100 ppm TEA at this temperature is about 26, which is nearly 1 times higher than that of pure WO 3 nanofibers. The improvement of gas -sensitive performance is mainly attributed to the successful construction of heterojunctions to improve electron transport efficiency and the optimization of morphology and structure through the composite.