Response speed of SnO_(2)-based H_(2)S gas sensors with CuO nanoparticles

摘要

CuO nanoparticles on sputtered SnO_(2) thin-film surface exhibit a fast response speed (14 s) and recovery time (61 s) for trace level (20 ppm) H_(2)S gas detection. The sensitivity of the sensor (S～2.06×10~(3)) is noted to be high at a low operating temperature of 130℃. CuO nanoparticles on SnO_(2) allow effective removal of excess adsorbed oxygen from the uncovered SnO_(2) surface due to spillover of hydrogen dissociated from the H_(2)S-CuO interaction.