Abstract
We investigated the effect of grain size on the H2-sensing behavior of SnO2-ZnO composite nanofibers. The 0.9SnO2-0.1ZnO composite nanofibers were calcined at 700 °C for various times to control the size of nanograins. A bifunctional sensing mechanism, which is related not only to the SnO2-SnO2 nanograins, but also to the ZnO-SnO2 nanograins with surface metallization effect, is responsible for the grain-oriented H2-sensing properties and the selective improvement in sensing behavior to H2 gas compared to other gases. Smaller grains are much more favorable for superior H2 sensing in SnO2-ZnO composite nanofibers, which will be an important guideline for their use in H2 sensors. The one-dimensional nanofiber-based structures in the present study will be efficient in maximizing the sensing capabilities by providing a larger amount of junctions.
Original language | English |
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Pages (from-to) | 2486-2494 |
Number of pages | 9 |
Journal | ACS applied materials & interfaces |
Volume | 8 |
Issue number | 4 |
DOIs | |
State | Published - 3 Feb 2016 |
Bibliographical note
Publisher Copyright:© 2016 American Chemical Society.
Keywords
- hydrogen
- nanofibers
- oxide
- sensors
- SnO
- ZnO