Dual functionalized flower-like MoS2 nanospheres with Pd and g-C3N4 for triethylamine gas sensing performance
Weiwei Guo, Kewei Chen, Song Wang, Hejing Zhang, Dianwu Wu
Abstract
Triethylamine, a colorless transparent liquid with a pungent taste, is highly toxic. Here, we prepared the flower-like Pd-MoS 2 /g-C 3 N 4 nanosphere with BET surface area of 31.568 m 2 /g by hydrothermal method to detect triethylamine. The prepared Pd-MoS 2 /g-C 3 N 4 composite presents high gas response (9.85), fast response/recovery times (38 s/26 s) to 30 ppm TEA at 225 ℃. Furthermore, the Pd-MoS 2 /g-C 3 N 4 also has good selectivity , stability and humidity resistance for detecting TEA. The significantly improved gas sensing performance of the Pd-MoS 2 /g-C 3 N 4 composite can be due to the spillover effect and S vacancies by doping Pd, the n-n heterojunctions and large surface area by combining g-C 3 N 4 .