Hydrothermal synthesis of SnO2-CuO composite nanoparticles as a fast-response ethanol gas sensor

In this work, the SnO2-CuO composite nanoparticles are fabricated as an ethanol gas sensor by one-step hydrothermal method, which is a core-shell structure composed of tetragonal tin oxide and monoclinic copper oxide. As ethanol gas sensor, the SnO2-CuO composite nanoparticles show excellent gas sensitivity and good selectivity to ethanol when deionized water as the hydrothermal solvent and Sn: Cu = 1: 1, and it have a small response recovery time of approximately 4 and 10 s respectively, and response value has a good linear relationship with the ethanol concentration between 50 and 300 ppm. The outstanding gas sensor character of the SnO2-CuO composite nanoparticles would be mainly attributed to special heterostructure and synergistic effect between tin oxide and copper oxide. (c) 2021 Elsevier B.V. All rights reserved.

Automated summary

The SnO2-CuO composite nanoparticles fabricated as an ethanol gas sensor exhibit excellent sensitivity and selectivity to ethanol, with short response recovery time and good linear relationship between response value and ethanol concentration, mainly due to the special heterostructure and synergistic effect between tin oxide and copper oxide.