| Autor: |
Pakhare, K. S., Sargar, B. M., Potdar, S. S., Sharma, A. K., Patil, U. M. |
| Předmět: |
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| Zdroj: |
Journal of Electronic Materials; Oct2019, Vol. 48 Issue 10, p6269-6279, 11p |
| Abstrakt: |
The simple chemical bath deposition (CBD) method is used to synthesize SnO2–ZnO nanocomposite at room temperature. Formation of SnO2–ZnO nancomposite is confirmed by the x-ray diffraction (XRD) pattern of annealed films. Scanning electron microscopy (SEM) micrographs of nanocomposite SnO2–ZnO depict that morphological change from nanocubes to manifold hexagonal nanorods with an increase in ZnO content in a composite sample. Also, pure SnO2 sample exhibits interconnected nanospheres. Electron dispersive spectroscopy (EDS) is employed to confirm elemental compositions in composite films. SnO2–ZnO samples were applied as a sensor for different test gases, namely liquified petroleum gas (LPG), ethanol, ammonia (NH3), and hydrogen sulfide (H2S). The maximum response of 59.67% is observed for ethanol at an operating temperature of 275°C and 24 ppm gas concentration. Also, a composite sensor shows a quick response in comparison with a bare sensor. This superior performance of composite over pure sensor may be attributed to a n–n heterojunction at intergrain boundaries. The SnO2–ZnO sensor is found to be selective towards ethanol even at lower gas concentrations. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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