Hydrothermal synthesis of hierarchical CoO/SnO2 nanostructures for ethanol gas sensor
| Autor: | Lianjing Zhao, Xueli Yang, Fangmeng Liu, Qingji Wang, Geyu Lu, Chang Liu, Tingting Lin, Jun Lin, Xueying Kou |
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| Rok vydání: | 2018 |
| Předmět: |
Ethanol
Nanostructure Materials science Heterojunction 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Hydrothermal circulation 0104 chemical sciences Surfaces Coatings and Films Electronic Optical and Magnetic Materials Biomaterials chemistry.chemical_compound Colloid and Surface Chemistry chemistry Chemical engineering Hydrothermal synthesis Molecule Ethanol fuel 0210 nano-technology |
| Zdroj: | Journal of Colloid and Interface Science. 513:760-766 |
| ISSN: | 0021-9797 |
| Popis: | In this work, ethanol gas sensor with high performance was fabricated successfully with hierarchical CoO/SnO2 heterojunction by two-steps hydrothermal method. The response value of CoO/SnO2 sensor is up to 145 at 250 °C when exposed to 100 ppm ethanol gas, which is much higher than that (13.5) of SnO2 sensor. These good sensing performances mainly attribute to the formation of the CoO/SnO2 heterojunction, which makes great variation of resistance in air and ethanol gas. Thus, the combination of n-type SnO2 and p-type CoO provides an effective strategy to design new ethanol gas sensors. The unique nanostructure also played an important role in detecting ethanol, due to its contribution in facilitating the transport rate of the ethanol gas molecules. Also, we provide a general two-step strategy for designing the heterojunction based on the SnO2 nanostructure. |
| Databáze: | OpenAIRE |
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