Response speed of SnO2-based H2S gas sensors with CuO nanoparticles

作者：Arijit Chowdhuri, Vinay Gupta, Kondepudy Sreenivas, Rajeev Kumar, Subho Mozumdar, P. K. Patanjali · 发表于：Applied Physics Letters · 年份：2004 · DOI：10.1063/1.1646760 · 被引用次数：327 · 研究领域：Gas Sensing Nanomaterials and Sensors、Advanced Chemical Sensor Technologies、ZnO doping and properties

CuO nanoparticles on sputtered SnO2 thin-film surface exhibit a fast response speed (14 s) and recovery time (61 s) for trace level (20 ppm) H2S gas detection. The sensitivity of the sensor (S∼2.06×103) is noted to be high at a low operating temperature of 130 °C. CuO nanoparticles on SnO2 allow effective removal of excess adsorbed oxygen from the uncovered SnO2 surface due to spillover of hydrogen dissociated from the H2S–CuO interaction.