【作者】：Lingling Meng, Yuliang Li, Man Yang, Xiaohong Chuai*, Zhijie Zhou, Changhua Hu, Peng Sun, Fangmeng Liu, Xu Yan, Geyu Lu*
【题目】：Temperature-controlled resistive sensing of gaseous H2S o r N O2 by using flower-like palladium-doped SnO2nanomaterials
【关键词】：Gas sensors, Pd-doped SnO2, H2S, NO2, Temperature-adjusted, Hydrothermal method
【版面信息】：Microchimica Acta (2020) 187: 297
摘要:
Palladium-doped SnO2nanomaterials, with palladium in fractions from 0 to 10 mol% were hydrothermally synthesized and characterized by XRD, FESEM, TEM, and XPS. Their gas sensing properties were studied in two temperature ranges of 75-95℃and 160-210℃. The sensor using 5 mol% Pd-doped SnO2exhibits temperature-dependent sensing property. NO2 can be detected at 80℃, while H2S is preferably detected at 180℃. The response to 10 ppm H2S is 50 times higher than that of the undoped sample. Its detection limit is 500 ppb. For NO2, the sensor exhibited strong response and a lower detection limit of 20 ppb. In view of the selective detection of H2S and NO2by regulating the temperature, palladium-doped SnO2has great prospects in the detection of H2S and NO2. Schematic of the gas sensing mechanism of the S-5% Pd doped SnO2.
