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Hierarchical α-Fe2O3/NiO Composites with a Hollow Structure for a Gas Sensor
Abstract
Hierarchical α-Fe2O3/NiO composites with a hollow nanostructure were synthesized by a facile hydrothermal method. The structures and morphologies of the composites were investigated by different kinds of techniques, including X-ray diffraction, field-emission electron scanning microscopy, transmission electron microscopy, and energy dispersive spectroscopy. Hierarchical α-Fe2O3/NiO composites were fabricated by growing the α-Fe2O3 nanorods on the surfaces of porous NiO nanosheets with a thickness of ∼12 nm. The gas sensing properties of hierarchical α-Fe2O3/NiO composites toward toluene were investigated using a static system. The response of α-Fe2O3/NiO composites to 100 ppm toluene was ∼18.68, which was 13.18 times higher than that of pure NiO at 300 °C. The enhanced response can be attributed to heterojunction. Meanwhile, the rapid response and recovery characteristics were observed because of the porous hollow structural characteristics and catalytic actions of α-Fe2O3 and NiO.
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Self-citation
Metadata
- Authors
- Wang, C., Cheng, X., Zhou, X., Sun, P., Hu, X., Shimanoe, K., Lu, G., & Yamazoe, N.
- Venue
- ACS Applied Materials & Interfaces
- Publisher
- American Chemical Society (ACS)
- Published
- 2014-07-16
- Volume
- 6
- Issue
- 15
- Pages
- 12031-12037
- ISSN
- 1944-8244 (ISSN-L)
- 1944-8252
- OpenAlex
- W2322541659
- Cited by
- 283
- References
- 20
- FWCI
- 15.03
- Type
- journal article
- Language
- en
- Open access
- closed
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