Journal
RSC ADVANCES
Volume 5, Issue 46, Pages 36340-36346Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c5ra03675e
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Funding
- Program for Changjiang Scholars and Innovative Research Team in University [IRT1017]
- Graduate Innovation Fund of Jilin University [20121108]
- National Natural Science Foundation of China [51102109]
- Postdoctoral Science Foundation of China [2012M510878, 2014T70289]
- Program for Science and Technology Development [20110725]
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1D Co3O4/alpha-Fe2O3 core-shell nanofibers were successfully fabricated by a facile and template-free coaxial electrospinning method, and developed for acetone gas detection. Morphology and component characterizations confirm that the as-prepared 1D heterostructures possess a well-defined core-shell structure with Co3O4 in the core and alpha-Fe2O3 in the shell. The unique 1D core-shell nanostructures, heterojunction effect at the Co3O4/alpha-Fe2O3 interfaces and the catalysis of Co3O4 endow the Co3O4/alpha-Fe2O3 core-shell nanofiber-based sensor with an enhanced gas sensing performance in terms of good sensing selectivity, high sensitivity (11.7), rapid response/recovery times (2 s/20 s) and better reproducibility for acetone gas. The gas sensing mechanism is proposed in detail. Overall, the 1D Co3O4/alpha-Fe2O3 core-shell heterostructure nanofibers synthesized through coaxial electrospinning make a promising and effective acetone sensor.
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