Enhanced gas selectivity induced by surface active oxygen in SnO/SnO₂ heterojunction structures at different temperatures.

ABSTRACT: The development of heterojunction structures has been considered as an important step for sensing materials. In this report, 3D hierarchical SnO-SnO₂ heterojunction structures were synthesized and developed via simple one-pot hydrothermal synthesis without any extra processes. The prepared 3D samples exhibit high sensitivity, benefiting from the synergistic effects of SnO and SnO₂. Interestingly, SnO-SnO₂ hybrid structures exhibited distinctly different sensitivities at 180 and 280 °C, and the sensitivity can achieve values of 47.69 and 41.56 toward ethanol and acetone, respectively, at concentrations of 100 ppm. A mechanistic analysis of the sensitivity and concentration-dependence revealed that the oxygen species on the surface were O^- a

SUBMITTER: Yin G 

PROVIDER: S-EPMC9059712 | biostudies-literature | 2019 Jan

REPOSITORIES: biostudies-literature