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Synthesis, Characterization and Enhanced Sensing Properties of a NiO/ZnO p-n Junctions Sensor for the SF6 Decomposition Byproducts SO2, SO2F2, and SOF2.
- Source :
- Sensors (14248220); Apr2017, Vol. 17 Issue 4, p913, 14p
- Publication Year :
- 2017
-
Abstract
- The detection of partial discharge and analysis of the composition and content of sulfur hexafluoride SF<subscript>6</subscript> gas components are important to evaluate the operating state and insulation level of gas-insulated switchgear (GIS) equipment. This paper reported a novel sensing material made of pure ZnO and NiO-decorated ZnO nanoflowers which were synthesized by a facile and environment friendly hydrothermal process for the detection of SF<subscript>6</subscript> decomposition byproducts. X-ray diffraction (XRD), field emission scanning electron microscopy (FESEM), transmission electron microscopy (TEM), high resolution transmission electron microscopy (HRTEM), energy-dispersive X-ray spectroscopy (EDS) and X-ray photoelectron spectroscopy (XPS) were used to characterize the structural and morphological properties of the prepared gas-sensitive materials. Planar-type chemical gas sensors were fabricated and their gas sensing performances toward the SF<subscript>6</subscript> decomposition byproducts SO<subscript>2</subscript>, SO<subscript>2</subscript>F<subscript>2</subscript>, and SOF<subscript>2</subscript> were systemically investigated. Interestingly, the sensing behaviors of the fabricated ZnO nanoflowers-based sensor to SO<subscript>2</subscript>, SO<subscript>2</subscript>F<subscript>2</subscript>, and SOF<subscript>2</subscript> gases can be obviously enhanced in terms of lower optimal operating temperature, higher gas response and shorter response-recovery time by introducing NiO. Finally, a possible gas sensing mechanism for the formation of the p-n junctions between NiO and ZnO is proposed to explain the enhanced gas response. All results demonstrate a promising approach to fabricate high-performance gas sensors to detect SF<subscript>6</subscript> decomposition byproducts. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 14248220
- Volume :
- 17
- Issue :
- 4
- Database :
- Complementary Index
- Journal :
- Sensors (14248220)
- Publication Type :
- Academic Journal
- Accession number :
- 122915129
- Full Text :
- https://doi.org/10.3390/s17040913