【作者】：Yueyue Li , Mei Dai, Jihao Bai , Yilin Wang, Yuan Li, Chenchang Wang , Fengmin Liu , Peng Sun, Tianshuang Wang, Geyu Lu
【题目】：Ppb-level NO2 sensing properties at room temperature of ultra-thin SnS2 nanopetals annealed at different temperatures
【关键词】：Ultra-thin SnS2 nanopetals NO2 sensors Low detection limit Sulfur vacancies Room temperature
【版面信息】：Ppb-level NO2 sensing properties at room temperature of ultra-thin SnS2 nanopetals annealed at different temperatures. Sensors and Actuators B: Chemical 2022, 370.
摘要:
Two-dimensional SnS2with stable electron transport capacity, high specific surface area, and high surface activity due to defects such as sulfur vacancies, is a suitable candidate for gas sensors at room temperature. Here, ultra-thin SnS2nanopetals are synthesized and planar type sensors are obtained through coating SnS2on a substrate with interdigitated electrodes. Samples annealed at different temperatures were characterized and their gas-sensing properties were compared. The sensor annealed at 200◦C in the air of the muffle furnace (SnS2-200) exhibits the best sensing performance with the high response of 24.20 to 100 ppb NO2at RT and ultra-low detection limit of 5 ppb NO2. Moreover, the SnS2-200 sensor also possesses good repeatability, selectivity and long-term stability. The excellent sensing performances prove that the SnS2holds excellent application prospects in the detection of trace-level NO2.
