Highly sensitive and selective triethylamine sensor based on SnO2@ZnO nanocomposite synthesized apply high humidity atmosphere

Triethylamine (TEA) sensors are an effective and powerful tool for real-time monitoring of TEA, and play an important role in early warning of production processes, environmental atmospheric monitoring and human health protection. In this paper, SnO₂/ZnO complex oxide was prepared by calcining bimetallic organic frameworks (BMOFs) to improve both the selectivity, sensitivity and accuracy of TEA-sensing materials and devices. The results show that the obtained 5Sn5Zn complex oxide prepared by mol (Sn):mol (Zn) = 1:1 has excellent selective responsiveness, repeatability and longtime reliability stability to TEA gas at 270 °C Besides, the 5Sn5Zn complex oxide exhibits a rapid response/recovery performance to TEA at 100 ppm concentration (T_res/T_rec = 4 s/60 s separately), especially at the high humidity of 40–90% relative humidity (RH), and the response degree of the 5Sn5Zn complex oxide to TEA only decreases by 17%. This may be the best TEA selective response stability achieved by SnO₂/ZnO complex oxide material under high humidity conditions.